An adsorption material prepared by using a magnetic deep eutectic solvent and a method for adsorbing dyes in waste oil and wastewater

Abstract

The present application discloses an adsorbent material prepared by using a magnetic low eutectic solvent and a method for adsorbing waste engine oil and dyes in wastewater, which belongs to the field of sewage treatment and waste engine oil recovery. The adsorbent material is prepared by using lithium battery positive electrode waste lithium cobalt oxide to achieve waste treatment. In the technical scheme of the present application, the components of the adsorbent material include a low eutectic solvent, a magnetic material and lithium cobalt oxide; the adsorbent material is prepared by the following steps: 1) stirring and mixing a hydrogen bond donor and a hydrogen bond acceptor to form a low eutectic solvent; 2) mixing the low eutectic solvent, the magnetic material and lithium cobalt oxide in proportion to obtain an intermediate mixture; 3) heating and stirring the intermediate mixture to obtain the adsorbent material; 4) grinding the adsorbent material obtained in step 3) into powder. The advantage of the present invention is that it can overcome the drawbacks of the prior art, treat waste with waste, is easy to operate, has high adsorption efficiency and is easy to recycle, and has high practical application value for wastewater treatment, waste engine oil recovery and lithium battery recovery.

Description

Technical Field

[0001] The invention relates to an adsorption material prepared by using a magnetic low eutectic solvent and a method for adsorbing waste engine oil and dye in waste water, belonging to the field of waste water treatment and waste engine oil recovery. Background Art

[0002] With the development and progress of science and technology, lithium-ion batteries are widely used in many fields such as production and life due to their high energy density, high charging efficiency, and low self-discharge. However, the production cost of lithium cobalt oxide in the positive electrode material of lithium-ion batteries is high, and improper handling will cause pollution to the environment. Low eutectic solvents are two-component or three-component eutectics composed of hydrogen bond acceptors and hydrogen bond donors. They have the advantages of low cost, simple synthesis, strong biodegradability, and good biocompatibility. They are called "green solvents of the 21st century". Magnetic low eutectic solvents are a type of low eutectic solvents. The use of magnetic low eutectic solvents to dissolve lithium cobalt oxide is mild, green and efficient. Dye wastewater is one of the main industrial wastewaters. The heavy metal ions present in dyes cannot be degraded. They accumulate in the human body through the food chain and are harmful to the human body. Waste oil contains carcinogens, among which aromatic organic compounds may harm the human blood system and nervous system when in contact with the human body, but the current cost of recycling waste oil is relatively high. Summary of the invention

[0003] The present invention provides an adsorption material prepared by utilizing a magnetic low eutectic solvent and a method for adsorbing dyes in waste engine oil and waste water. The material can be used to treat waste with waste, has simple operation, high adsorption efficiency and is easy to recycle, and has high practical application value for wastewater treatment and lithium battery recovery.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is an adsorption material prepared by using a magnetic low eutectic solvent, the components of the adsorption material include a low eutectic solvent, a magnetic material and lithium cobalt oxide; the adsorption material is prepared by the following steps:

[0005] 1) stirring and mixing a hydrogen bond donor and a hydrogen bond acceptor to form a deep eutectic solvent;

[0006] 2) mixing the deep eutectic solvent, the magnetic material and lithium cobalt oxide according to a proportion to obtain an intermediate mixture;

[0007] 3) heating and stirring the intermediate mixture to obtain an adsorption material;

[0008] 4) grinding the adsorption material obtained in step 3) into powder;

[0009] In step 2), the ratio of the low eutectic solvent, the magnetic material and the lithium cobalt oxide is 4-8 parts by weight of the low eutectic solvent, 0.5-1.5 parts by weight of the magnetic material and 0.05-0.15 parts by weight of the lithium cobalt oxide.

[0010] Optimized, in the adsorption material prepared by using the magnetic low eutectic solvent, the hydrogen bond donor of the low eutectic solvent is polyethylene glycol 200, the hydrogen bond acceptor of the low eutectic solvent is phytic acid; and the magnetic material is ferrosoferric oxide.

[0011] Optimally, in the above-mentioned adsorption material prepared by using a magnetic deep eutectic solvent, the molar ratio of the hydrogen bond donor in the deep eutectic solvent to the hydrogen bond acceptor in the deep eutectic solvent is 1:1.

[0012] Optimally, in the above-mentioned adsorption material prepared by using a magnetic low eutectic solvent, in step 1), the hydrogen bond donor and the hydrogen bond acceptor are stirred and mixed at 60 degrees Celsius to form a low eutectic solvent.

[0013] Optimally, in the above-mentioned adsorption material prepared by using a magnetic deep eutectic solvent, in step 3), the intermediate mixture is stirred at 100 degrees Celsius for 24 hours to obtain the adsorption material.

[0014] A method for adsorbing dyes in wastewater, using the adsorption material prepared by using the magnetic low eutectic solvent to adsorb dye wastewater, wherein the dye wastewater is wastewater containing one or more dyes selected from methylene blue, methyl orange and rhodamine B.

[0015] Optimally, in the above method for adsorbing dyes in wastewater, the process of adsorbing the dyes is carried out at room temperature, and the adsorption time is 1 hour to 72 hours.

[0016] Optimized, in the above method for adsorbing dyes in wastewater, the concentration of the dye aqueous solution is 0.2 micromoles per liter to 10 micromoles per liter, and the volume of the dye aqueous solution is 5 milliliters to 15 milliliters.

[0017] Optimally, in the above method for adsorbing dyes in wastewater, the ratio of the adsorbent material to the dye aqueous solution is 1 g / 5 ml to 0.1 g / 15 ml.

[0018] A method for adsorbing waste engine oil, comprising preparing an adsorption material using a magnetic low eutectic solvent for adsorbing waste engine oil, wherein the mass of the adsorbent is 2 grams, the adsorption temperature is 25 degrees Celsius, the adsorption time ranges from 20 minutes to 3 hours, the mass fraction of the water content of the engine oil ranges from 0 to 0.2, and the mass of the engine oil is 0.1 grams.

[0019] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and then placed in a high-speed centrifuge at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain the filtrate.

[0020] The absorbance of the original methylene blue aqueous solution and the methylene blue aqueous solution after adsorption was measured by a spectrophotometer at a wavelength of 662 nanometers with distilled water as a reference, the absorbance of the original rhodamine B aqueous solution and the rhodamine B aqueous solution after adsorption was measured at a wavelength of 554 nanometers with distilled water as a reference, and the absorbance of the original methyl orange aqueous solution and the methyl orange aqueous solution after adsorption was measured at a wavelength of 464 nanometers with distilled water as a reference; the adsorption rate was calculated based on the measured absorbance.

[0021] In the technical solution of the present application, polyethylene glycol 200 and phytic acid are mixed into a low eutectic solvent, and then the low eutectic solvent, ferrosoferric oxide and lithium cobalt oxide are mixed under certain conditions to obtain an adsorption material. The material is magnetic and can easily separate dyes and waste engine oil in wastewater after adsorption, which is in line with the concept of "treating waste with waste".

[0022] The present invention provides a method for absorbing dyes in wastewater, which combines the recovery of lithium cobalt oxide, a positive electrode material of lithium ion batteries, and the absorption of dyes in wastewater. It not only realizes the recovery of positive electrode materials of lithium ion batteries, but also can absorb dyes and waste oil in wastewater, which conforms to the concept of "using waste to treat waste". This method is simple to operate, has high adsorption efficiency, is easy to recycle and is green and environmentally friendly, and has important practical application value for wastewater treatment and lithium battery recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a graph showing the effect of time, dye concentration, dye volume, and new material quality on dye adsorption in wastewater in this application;

[0024] Figure 2 This is a diagram showing the effect of the adsorption of methylene blue, methyl orange and rhodamine B in wastewater by the adsorption material in this application. DETAILED DESCRIPTION

[0025] The technical features of the present invention are further described below in conjunction with specific embodiments.

[0026] The invention provides an adsorption material prepared by using a magnetic low eutectic solvent, and provides a method for adsorbing dyes in wastewater by using the adsorption material.

[0027] The chemical formulas of the low eutectic solvent polyethylene glycol 200 and phytic acid are as follows:

[0028]

[0029] The chemical formula of ferroferric oxide is as follows:

[0030]

[0031] The chemical formula of the dye is as follows:

[0032]

[0033] Example 1

[0034] This embodiment discloses an adsorption material prepared by using a magnetic low eutectic solvent, the components of which mainly include polyethylene glycol 200, phytic acid, ferrosoferric oxide and lithium cobalt oxide.

[0035] The preparation method mainly comprises the following steps:

[0036] Add polyethylene glycol 200: phytic acid in a molar ratio of 1:1 into a reagent bottle and stir thoroughly at 60 degrees Celsius to generate a polyethylene glycol 200-phytic acid type low eutectic solvent.

[0037] The low eutectic solvent, ferrosoferric oxide and lithium cobalt oxide were mixed in a reaction bottle in a mass ratio of 5:1:0.1, put into an oil bath, and stirred at 100 degrees Celsius for 24 hours to obtain an adsorption material.

[0038] Grind the adsorbent material in a mortar and place it in a reagent bottle for storage.

[0039] This embodiment also discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb dye wastewater. The adsorption treatment method mainly includes the following steps:

[0040] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0041] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0042] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 55.80%.

[0043] Example 2

[0044] The difference between this embodiment and embodiment 1 is that:

[0045] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0046] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L Rhodamine B aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0047] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0048] The absorbance of the filtrate was measured at a wavelength of 554 nanometers using a spectrophotometer. Figure 2 As shown, the adsorption rate of the new material on Rhodamine B in wastewater was measured by spectrophotometry and was 51.53%.

[0049] Example 3

[0050] The difference between this embodiment and embodiment 1 is that:

[0051] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0052] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of 10 μmol / L methyl orange aqueous solution and place a magnetic bar, and place the reaction in an oil bath at 25 degrees Celsius and stir for 8 hours.

[0053] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0054] The absorbance of the filtrate was measured at a wavelength of 464 nanometers using a spectrophotometer. Figure 2 As shown, the adsorption rate of methyl orange in wastewater by the new material was measured by spectrophotometry and was 55.12%.

[0055] Example 4

[0056] This embodiment discloses an adsorption material prepared by using a magnetic low eutectic solvent, the components of which mainly include polyethylene glycol 200, phytic acid, ferrosoferric oxide and lithium cobalt oxide.

[0057] The preparation method mainly comprises the following steps:

[0058] Add polyethylene glycol 200: phytic acid in a molar ratio of 1:1 into a reagent bottle and stir thoroughly at 60 degrees Celsius to generate a polyethylene glycol 200-phytic acid type low eutectic solvent.

[0059] The low eutectic solvent and lithium cobalt oxide were mixed in a reaction bottle at a mass ratio of 5:0.1, placed in an oil bath, and stirred at 100 degrees Celsius for 24 hours to obtain an adsorption material.

[0060] Grind the adsorbent material in a mortar and place it in a reagent bottle for storage.

[0061] This embodiment also discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb dye wastewater. The adsorption treatment method mainly includes the following steps:

[0062] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0063] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0064] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. The adsorption rate of the new material on methylene blue in wastewater was measured by spectrophotometry to be 44.44%.

[0065] Example 5

[0066] This embodiment discloses an adsorption material prepared by using a magnetic low eutectic solvent, the components of which mainly include polyethylene glycol 200, phytic acid, ferrosoferric oxide and lithium cobalt oxide.

[0067] The preparation method mainly comprises the following steps:

[0068] Add polyethylene glycol 200: phytic acid in a molar ratio of 1:1 into a reagent bottle and stir thoroughly at 60 degrees Celsius to generate a polyethylene glycol 200-phytic acid type low eutectic solvent.

[0069] The low eutectic solvent and ferrosoferric oxide were mixed in a reaction bottle at a mass ratio of 5:1, placed in an oil bath, and stirred at 100 degrees Celsius for 24 hours to obtain an adsorption material.

[0070] Grind the adsorbent material in a mortar and place it in a reagent bottle for storage.

[0071] This embodiment also discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb dye wastewater. The adsorption treatment method mainly includes the following steps:

[0072] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0073] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0074] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. The adsorption rate of the new material on methylene blue in wastewater was measured by spectrophotometry to be 46.61%.

[0075] Example 6

[0076] The difference between this embodiment and embodiment 1 is that:

[0077] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0078] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 1 hour.

[0079] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0080] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. The adsorption rate of the new material on methylene blue in wastewater was measured by spectrophotometry to be 49.54%.

[0081] Example 7

[0082] The difference between this embodiment and embodiment 1 is that:

[0083] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0084] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 4 hours.

[0085] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0086] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in a, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 53.66%.

[0087] Example 8

[0088] The difference between this embodiment and embodiment 1 is that:

[0089] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0090] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 24 hours.

[0091] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0092] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in a, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 59.95%.

[0093] Example 9

[0094] The difference between this embodiment and embodiment 1 is that:

[0095] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0096] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 72 hours.

[0097] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0098] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in a, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 72.10%.

[0099] Example 10

[0100] The difference between this embodiment and embodiment 1 is that:

[0101] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0102] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 10 ml of an aqueous solution of methylene blue with a concentration of 10 μmol / L and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0103] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0104] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in c, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 48.70%.

[0105] Embodiment 11

[0106] The difference between this embodiment and embodiment 1 is that:

[0107] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0108] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 15 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0109] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0110] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in c, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and it was 43.54%.

[0111] Example 12

[0112] The difference between this embodiment and embodiment 1 is that:

[0113] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0114] Weigh 0.10 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0115] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0116] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in Figure d, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 54.35%.

[0117] Example 13

[0118] The difference between this embodiment and embodiment 1 is that:

[0119] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0120] Weigh 0.20 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0121] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0122] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in Figure d, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 72.19%.

[0123] Embodiment 14

[0124] The difference between this embodiment and embodiment 1 is that:

[0125] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0126] Weigh 0.50 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of a 10 μmol / L methylene blue aqueous solution and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0127] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0128] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in Figure d, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 86.08%.

[0129] Embodiment 15

[0130] The difference between this embodiment and embodiment 1 is that:

[0131] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0132] 1.00 g of the adsorbent material was weighed and placed at the bottom of the reaction bottle, 5 ml of a 10 μmol / L methylene blue aqueous solution was added and a magnetic bar was placed, and the reaction was placed in an oil bath and stirred at 25 degrees Celsius for 8 hours.

[0133] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0134] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in Figure d, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 94.54%.

[0135] Example 16

[0136] The difference between this embodiment and embodiment 1 is that:

[0137] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0138] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of an aqueous solution of 5 μmol / L methylene blue and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0139] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0140] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in Figure d, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 65.03%.

[0141] Embodiment 17

[0142] The difference between this embodiment and embodiment 1 is that:

[0143] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0144] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of an aqueous solution with a concentration of 2.5 μmol / L of methylene blue and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0145] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0146] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in Figure d, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 73.40%.

[0147] Embodiment 18

[0148] The difference between this embodiment and embodiment 1 is that:

[0149] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0150] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of an aqueous solution of methylene blue with a concentration of 1 μmol / L and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0151] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0152] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in Figure d, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 76.57%.

[0153] Embodiment 19

[0154] The difference between this embodiment and embodiment 1 is that:

[0155] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0156] Weigh 0.15 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of an aqueous solution with a concentration of 0.2 μmol / L of methylene blue and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0157] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0158] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. Figure 1 As shown in b, the adsorption rate of methylene blue in wastewater by the new material was measured by spectrophotometry and was 83.33%.

[0159] Embodiment 20

[0160] The difference between this embodiment and embodiment 1 is that:

[0161] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material prepared above to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0162] Weigh 0.20 g of the adsorbent material and place it at the bottom of the reaction bottle, add 5 ml of an aqueous solution with a concentration of 0.2 μmol / L of methylene blue and place a magnetic bar, and place the reaction in an oil bath and stir at 25 degrees Celsius for 8 hours.

[0163] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0164] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. The adsorption rate of the new material on methylene blue in wastewater was measured by spectrophotometry to be 57.14%.

[0165] Embodiment 21

[0166] The difference between this embodiment and embodiment 1 is that:

[0167] This embodiment discloses a method for adsorbing dyes in wastewater, which uses the adsorption material recovered in Example 20 to adsorb the dye wastewater. The adsorption treatment method mainly includes the following steps:

[0168] The adsorbent material in the needle filter of Example 20 was washed with anhydrous ethanol, and the recovered adsorbent material was obtained after vacuum filtration. The recovered adsorbent material was placed at the bottom of the reaction bottle, 5 ml of an aqueous solution with a concentration of 0.2 μmol / L of methylene blue was added, and a magnetic bar was placed, and the reaction was placed in an oil bath pot and stirred at 25 degrees Celsius for 8 hours.

[0169] After the adsorption is completed, the solid-liquid mixture in the reaction bottle is immediately transferred to a 15 ml centrifuge tube, and the centrifuge tube is placed in a high-speed centrifuge and centrifuged at 12,000 rpm for 20 minutes. After the centrifugation is completed, the new material is filtered out using a needle filter to obtain a filtrate.

[0170] The absorbance of the filtrate was measured at a wavelength of 662 nanometers using a spectrophotometer. The adsorption rate of the new material on methylene blue in wastewater was measured by spectrophotometry to be 59.52%.

[0171] Embodiment 22

[0172] This embodiment discloses an adsorbent prepared by using a magnetic low eutectic solvent, the components of which mainly include polyethylene glycol 200, phytic acid, ferrosoferric oxide and lithium cobalt oxide.

[0173] The preparation method mainly comprises the following steps:

[0174] Add polyethylene glycol 200: phytic acid in a molar ratio of 1:1 into a reagent bottle and stir thoroughly at 60 degrees Celsius to generate a polyethylene glycol 200-phytic acid type low eutectic solvent.

[0175] The low eutectic solvent, ferrosoferric oxide and lithium cobalt oxide were mixed in a reaction bottle in a mass ratio of 5:1:0.1, put into an oil bath, and stirred at 100 degrees Celsius for 24 hours to obtain an adsorption material.

[0176] Grind the adsorbent material in a mortar and place it in a reagent bottle for storage.

[0177] This embodiment also discloses a method for adsorbing waste engine oil, which uses the adsorbent prepared above to adsorb the waste engine oil. The adsorption treatment method mainly includes the following steps:

[0178] Weigh 0.1 g of adsorbent and 2 g of waste engine oil with a water content of 0% in a centrifuge tube and adsorb at 25 degrees Celsius for 20 minutes.

[0179] After the adsorption is completed, centrifuge at a speed of 1000 rpm for 5 minutes, and then place the centrifuge tube at a fixed tilt angle to pour out the unabsorbed oil for 5 minutes. Use an analytical balance to measure and calculate the actual amount of adsorbed oil, and calculate its adsorption efficiency (expressed as the amount of waste oil adsorbed by 1 gram of adsorbent).

[0180] At 25 degrees Celsius, 0.1 grams of adsorbent can adsorb 0.2413 grams of waste engine oil with a water content of 0%, and the adsorption efficiency is 240.82%.

[0181] Embodiment 23

[0182] The difference between this embodiment and embodiment 22 is that:

[0183] This embodiment discloses a method for adsorbing waste engine oil, which uses the adsorbent prepared above to adsorb the waste engine oil. The adsorption treatment method mainly includes the following steps:

[0184] Weigh 0.1 g of adsorbent and 2 g of waste engine oil with a water content of 0% in a centrifuge tube and adsorb at 25 degrees Celsius for 1 hour.

[0185] After the adsorption is completed, centrifuge at a speed of 1000 rpm for 5 minutes, and then place the centrifuge tube at a fixed tilt angle to pour out the unabsorbed oil for 5 minutes. Use an analytical balance to measure and calculate the actual amount of adsorbed oil, and calculate its adsorption efficiency (expressed as the amount of waste oil adsorbed by 1 gram of adsorbent).

[0186] At 25 degrees Celsius, 0.1 grams of adsorbent can adsorb 0.2401 grams of waste engine oil with a water content of 0%, and the adsorption efficiency is 240.10%.

[0187] Embodiment 24

[0188] The difference between this embodiment and embodiment 22 is that:

[0189] This embodiment discloses a method for adsorbing waste engine oil, which uses the adsorbent prepared above to adsorb the waste engine oil. The adsorption treatment method mainly includes the following steps:

[0190] Weigh 0.1 g of adsorbent and 2 g of waste engine oil with a water content of 0% in a centrifuge tube and adsorb at 25 degrees Celsius for 3 hours.

[0191] After the adsorption is completed, centrifuge at a speed of 1000 rpm for 5 minutes, and then place the centrifuge tube at a fixed tilt angle to pour out the unabsorbed oil for 5 minutes. Use an analytical balance to measure and calculate the actual amount of adsorbed oil, and calculate its adsorption efficiency (expressed as the amount of waste oil adsorbed by 1 gram of adsorbent).

[0192] At 25 degrees Celsius, 0.1 grams of adsorbent can adsorb 0.2423 grams of waste engine oil with a water content of 0%, and the adsorption efficiency is 241.33%.

[0193] Embodiment 25

[0194] The difference between this embodiment and embodiment 22 is that:

[0195] This embodiment also discloses a method for adsorbing waste engine oil, which uses the adsorbent prepared above to adsorb the waste engine oil. The adsorption treatment method mainly includes the following steps:

[0196] Weigh 0.1 g of adsorbent and 2 g of waste engine oil with a water content of 20% in a centrifuge tube and adsorb at 25 degrees Celsius for 20 minutes.

[0197] After the adsorption is completed, centrifuge at a speed of 1000 rpm for 5 minutes, and then place the centrifuge tube at a fixed tilt angle to pour out the unabsorbed oil for 5 minutes. Use an analytical balance to measure and calculate the actual amount of adsorbed oil, and calculate its adsorption efficiency (expressed as the amount of waste oil adsorbed by 1 gram of adsorbent).

[0198] At 25 degrees Celsius, 0.1 grams of adsorbent can adsorb 0.5779 grams of waste engine oil with a water content of 0%, and the adsorption efficiency is 576.75%.

[0199] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. An adsorption material prepared by using a magnetic deep eutectic solvent, characterized in that: Its components include a low eutectic solvent, a magnetic material and lithium cobalt oxide, and it is prepared by the following steps: 1) stirring and mixing a hydrogen bond donor and a hydrogen bond acceptor to form a deep eutectic solvent; 2) mixing the deep eutectic solvent, the magnetic material and lithium cobalt oxide according to a proportion to obtain an intermediate mixture; 3) heating and stirring the intermediate mixture to obtain an adsorption material; 4) grinding the adsorption material obtained in step 3) into powder; In step 2), the ratio of the low eutectic solvent, the magnetic material and the lithium cobalt oxide is 4-8 parts by weight of the low eutectic solvent, 0.5-1.5 parts by weight of the magnetic material and 0.05-0.15 parts by weight of the lithium cobalt oxide; The hydrogen bond donor of the deep eutectic solvent is polyethylene glycol 200, the hydrogen bond acceptor of the deep eutectic solvent is phytic acid; the magnetic material is ferrosoferric oxide; In step 3), the intermediate mixture is stirred at 100 degrees Celsius for 24 hours to obtain an adsorption material.

2. The adsorption material prepared by using a magnetic deep eutectic solvent according to claim 1, characterized in that: The molar ratio of the hydrogen bond donor in the deep eutectic solvent to the hydrogen bond acceptor in the deep eutectic solvent is 1:

1.

3. The adsorption material prepared by using a magnetic deep eutectic solvent according to claim 1, characterized in that: In step 1), the hydrogen bond donor and the hydrogen bond acceptor are stirred and mixed at 60 degrees Celsius to form a deep eutectic solvent.

4. A method for adsorbing dyes in wastewater, characterized in that: The dye wastewater is adsorbed using the adsorption material prepared by using the magnetic low eutectic solvent as described in any one of claims 1 to 3, wherein the dye wastewater is wastewater containing one or more dyes selected from methylene blue, methyl orange, and rhodamine B.

5. The method for adsorbing dyes in wastewater according to claim 4, characterized in that: The process of adsorbing the dye is carried out at room temperature, and the adsorption time is 1 hour to 72 hours.

6. The method for adsorbing dyes in wastewater according to claim 4, characterized in that: The concentration of the dye aqueous solution is 0.2 micromol / L to 10 micromol / L, and the volume of the dye aqueous solution is 5 ml to 15 ml.

7. The method for adsorbing dyes in wastewater according to claim 4, characterized in that: The ratio of adsorbent material to aqueous dye solution used is 1 g / 5 ml to 0.1 g / 15 ml.

8. A method for absorbing waste engine oil, characterized in that: The adsorption material prepared using a magnetic low eutectic solvent as described in any one of claims 1 to 3 is used to adsorb waste engine oil, the mass of the adsorbent is 2 grams, the adsorption temperature is 25 degrees Celsius, the adsorption time ranges from 20 minutes to 3 hours, the mass fraction of the water content of the engine oil ranges from 0 to 0.2, and the mass of the engine oil is 0.1 grams.

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