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Magnetic chitosan/cationic surface active agent modified zeolite adsorbent and preparation method and application thereof

A surfactant and modified zeolite technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of adsorption and removal of organic pollutants and heavy metal ion pollutants in water without magnetic adsorbent materials Research reports and other issues to achieve the effect of high utilization, high efficiency and low cost

Inactive Publication Date: 2012-07-04
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been reports on the use of cationic surfactants to modify zeolite to remove organic pollutants in water and the use of chitosan to remove organic pollutants and heavy metal ions in water, there has been no report on the use of chitosan, zeolite, iron tetroxide and cationic surfactants as raw materials to prepare magnetic chitosan / cationic surfactant modified zeolite adsorbent materials, and there is no research report on the magnetic adsorbent materials to adsorb and remove organic pollutants and heavy metal ion pollutants in water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Weigh 2.5g of natural zeolite and 2.5g of ferric oxide respectively, place them in a reactor filled with 25mL of distilled water, stir to make the natural zeolite and ferric oxide fully mixed and in suspension, and use sodium hydroxide solution Adjust the pH value of the suspension to 10.0;

[0023] (2) Pipette the chitosan solution of 50mL and the suspension mixed solution to fully stir and mix, add dropwise sodium hydroxide solution during the mixing process to keep the pH value of the mixed solution at 10.0, continue to stir for 15min after the reaction is completed; then carry out solid-liquid separation, Use distilled water to wash the solid repeatedly until the pH of the supernatant is close to 7.0. After the solid is dried at 105°C, it is ground and passed through a 200-mesh sieve for later use. The resulting solid is recorded as chitosan / zeolite;

[0024] (3) Weigh 1g of chitosan / zeolite in a conical flask, pipette 16mL of cetylpyridinium bromide stock solut...

Embodiment 2

[0029] The operation process of this embodiment is basically the same as that of Example 1, except that the consumption of chitosan solution in step (2) is 25mL, and the adsorption capacity of CPB on the gained adsorbent is 168mmol / kg.

[0030] Weigh 0.025g of the adsorbent prepared by the above method, place it in 25mL humic acid solution with a concentration of 100mg / L, and adjust the pH of the solution to 4.0 and 7.0 with sodium hydroxide solution and hydrochloric acid solution. The solution was shaken on a constant temperature shaker in a water bath for 24 hours at a speed of 150 rpm. The test results show that the unit adsorption capacity of the adsorbent to humic acid is 99mg / g and 90mg / g respectively.

[0031]Weigh 0.025 g of the adsorbent prepared by the above method, place it in 25 mL of Congo red solution with a concentration of 100 mg / L, adjust the pH of the solution to 4.0 and 7.0 with sodium hydroxide solution and hydrochloric acid solution, respectively. The sol...

Embodiment 3

[0033] The present embodiment is basically the same as Example 1, except that the consumption of ferric oxide in step (1) is 1.5g, and the consumption of chitosan solution in step (2) is 40mL, the adsorption of CPB on the gained adsorbent The amount is 205 mmol / kg.

[0034] Weigh 0.025g of the adsorbent prepared by the above method, place 25mL of humic acid solution with a concentration of 100mg / L, adjust the pH of the solution to 7.0 with sodium hydroxide solution and hydrochloric acid solution, and place the solution on a water bath constant temperature oscillator Shake for 24 hours at a shaking rate of 150 rpm. The test results show that the unit adsorption capacity of the adsorbent to humic acid is 90 mg / g.

[0035] Weigh 0.025g of the adsorbent prepared by the above method, place it in 25mL of Congo red solution with a concentration of 100mg / L, adjust the pH of the solution to 7.0 with sodium hydroxide solution and hydrochloric acid solution, and place the solution on a ...

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PUM

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Abstract

The invention discloses a preparation method of a magnetic chitosan / cationic surface active agent modified zeolite adsorbent, which comprises preparing the magnetic chitosan / zeolite with ferroferric oxide, the zeolite and the chitosan serving as raw materials; mixing the magnetic chitosan / zeolite with cationic surface active agent solution; and obtaining the magnetic chitosan / cationic surface active agent modified zeolite adsorbent through constant-temperature water-bath oscillation. The prepared adsorbent can be applied to removing organic pollutants such as humic acid and congo red in water and removing heavy metal pollutants such as copper ions. Efficient utilization of cheap natural resources is achieved. The prepared product is suitable for removing soluble organic pollutants in drinking water, anionic dye in printing and dyeing wastewater and the heavy metal pollutants such as the copper ions, and has the advantages of high utilization rate, good separation effect, low price and the like.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and in particular relates to a magnetic chitosan / cationic surfactant modified zeolite adsorbent and a preparation method and application thereof. Background technique [0002] With the rapid development of my country's industry and agriculture and the improvement of people's living standards, the demand for water resources continues to increase, and the discharge of industrial wastewater and domestic sewage also increases. However, the treatment rate of industrial wastewater and domestic sewage in my country is relatively low. The pollution of my country's water environment is becoming more and more serious. There are natural organic substances such as humic acid, synthetic organic substances such as dyes, and heavy metal ions such as copper ions in the surface water bodies such as rivers, lakes and reservoirs in our country. The pollution of surface water bodies has seriously threa...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/58C02F1/62C02F101/20C02F101/30C02F101/34
Inventor 詹艳慧林建伟
Owner SHANGHAI OCEAN UNIV
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