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Quick-acting water body magnetic nano phosphorus removing agent as well as preparation method and application thereof

A magnetic nanometer and dephosphorization agent technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as inability to separate out, secondary pollution of water bodies, long processing time, etc., and achieve industrialization and The effect of high phosphorus removal effect, high removal efficiency and simple preparation method

Inactive Publication Date: 2020-12-29
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that LDH takes a long time to process in the actual water treatment process, and cannot be quickly and completely separated from the water body, which is easy to cause secondary pollution to the water body

Method used

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  • Quick-acting water body magnetic nano phosphorus removing agent as well as preparation method and application thereof
  • Quick-acting water body magnetic nano phosphorus removing agent as well as preparation method and application thereof
  • Quick-acting water body magnetic nano phosphorus removing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of fast-acting water body magnetic nano phosphorus removal agent (Fe 3 o 4 @LDH), including ferric oxide (Fe 3 o 4 ) and magnesium aluminum hydrotalcite (LDH), LDH coated in Fe 3 o 4 On the surface of nanoparticles, the coating amount of LDH is 32.5wt%. Fe was obtained by TG analysis 3 o 4 Mass of LDH in @LDH, then LDH / Fe 3 o 4 @LDH, that is to get the coating amount of LDH.

[0031] The above-mentioned magnetic nano phosphorus removal agent (Fe 3 o 4 @LDH) is prepared as:

[0032] (1) Weigh 0.1 g of petal-shaped iron ferric oxide nanoparticles and ultrasonically disperse them in 10 mL of deionized water to form suspension A;

[0033] (2) Weigh 1.2g of Mg(NO 3 ) 2 ·6H 2 O and 0.6g of Al(NO 3 ) 3 9H 2 O was ultrasonically dissolved in 5 mL of deionized water to obtain a mixed solution B;

[0034] (3) The mixed solution B is slowly added dropwise to the suspension A, and the NaOH solution with a concentration of 2.9mol / L is added dropwise to adju...

Embodiment 2

[0037] A kind of fast-acting water body magnetic nano phosphorus removal agent (Fe 3 o 4 @LDH), including ferric oxide (Fe3 o 4 ) and magnesium aluminum hydrotalcite (LDH), LDH coated in Fe 3 o 4 On the surface of nanoparticles, the coating amount of LDH is 30.3wt%.

[0038] The above-mentioned magnetic nano phosphorus removal agent (Fe 3 o 4 @LDH) is prepared as:

[0039] (1) Weigh 0.6 g of petal-shaped iron ferric oxide nanoparticles and ultrasonically disperse them in 10 mL of deionized water to form suspension A;

[0040] (2) Weigh 1.2g of Mg(NO 3 ) 2 ·6H 2 O and 0.6g of Al(NO 3 ) 3 9H 2 O was ultrasonically dissolved in 5 mL of deionized water to obtain a mixed solution B;

[0041] (3) The mixed solution B is slowly added dropwise to the suspension A, and at the same time, the NaOH solution with a concentration of 2.9mol / L is added dropwise to adjust the pH of the reaction system to 11. When the pH of the reaction system is 11, the dropwise addition of the Na...

Embodiment 3

[0044] A kind of fast-acting water body magnetic nano phosphorus removal agent (Fe 3 o 4 @LDH), including ferric oxide (Fe 3 o 4 ) and magnesium aluminum hydrotalcite (LDH), LDH coated in Fe 3 o 4 On the surface of nanoparticles, the coating amount of LDH is 29.8wt%.

[0045] The above-mentioned magnetic nano phosphorus removal agent (Fe 3 o 4 @LDH) is prepared as:

[0046] (1) Weigh 0.8 g of petal-shaped iron ferric oxide nanoparticles and ultrasonically disperse them in 10 mL of deionized water to form suspension A;

[0047] (2) Weigh 1.2g of Mg(NO 3 ) 2 ·6H 2 O and 0.6g of Al(NO 3 ) 3 9H 2 O was ultrasonically dissolved in 5 mL of deionized water to obtain a mixed solution B;

[0048] (3) The mixed solution B is slowly added dropwise to the suspension A, and the NaOH solution with a concentration of 2.9mol / L is added dropwise to adjust the pH of the reaction system to be 10.5. When the pH of the reaction system is 10.5, the dropwise addition of the NaOH soluti...

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Abstract

The invention discloses a quick-acting water body magnetic nano phosphorus removing agent as well as a preparation method and application thereof. The phosphorus removal agent comprises Fe3O4 and LDH,the LDH coats the surface of Fe3O4, and the coating amount is 10.3 wt%-32.5 wt%. The preparation method comprises the following steps: (1) adding ferroferric oxide into a dispersing agent and carrying out ultrasonic treatment to obtain a suspension A; (2) ultrasonically dispersing Mg(NO3)2.6H2O and Al(NO3)3.9H2O into water to obtain a mixed solution B; (3) adding the mixed solution B into the suspension A, adjusting the pH value to 9-11, and collecting a pre-product; and (4) washing and drying the pre-product to obtain the magnetic nano phosphorus removing agent. According to the application,the magnetic nano phosphorus removal agent is used for removing phosphorus in phosphorus-containing wastewater. The preparation method is simple and low in cost; and the phosphorus removal agent disclosed by the invention can achieve a relatively high phosphorus removal effect in a short time, and can be effectively separated from a wastewater system, so that secondary pollution to a water body is avoided.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a quick-acting water body magnetic nano-phosphorus removal agent and a preparation method and application thereof. Background technique [0002] With the country's economic development and modernization process, various types of environmental pollution are increasingly affecting our lives, especially water pollution is the number one threat. Eutrophication of water body is one of the most important water pollution problems facing the world today. With the continuous development of industry and agriculture, the eutrophication of water body is becoming more and more serious, which has become the main factor restricting the development of national economy and society in our country. Relevant data show that phosphorus is the decisive factor leading to eutrophication of water bodies. At present, commercial chemical phosphorus removal agents on the market mainly include ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/08B01J20/04B01J20/0248B01J20/28009C02F1/281C02F2101/105
Inventor 吴娟赵雨王杰林伟张曼莹梁国斌刘拥军于广
Owner JIANGSU UNIV OF TECH
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