A Method for Controlling Organic Arsine Pollution in Water Using Ordered Mesoporous Layered Double Hydroxides

A hydroxide and bimetal technology, applied in the direction of alkali metal oxide/hydroxide, metal/metal oxide/metal hydroxide catalyst, alkali metal compound, etc., can solve the problem of arsenic pollutant removal, etc. Achieve high removal rate, improve photocatalytic activity, and reduce secondary pollution

Active Publication Date: 2021-11-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, studies have used UV / H 2 o 2 , UV / O 3 Such advanced oxidation technologies oxidize organic arsine and show a good removal effect, but only realize the oxidation conversion of organic arsine to inorganic arsenic, and do not completely remove arsenic pollutants from water bodies. After this process, follow-up is needed. Treatment process

Method used

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  • A Method for Controlling Organic Arsine Pollution in Water Using Ordered Mesoporous Layered Double Hydroxides

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Experimental program
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Effect test

Embodiment 1

[0034] A method for controlling organic arsine pollution in water by using ordered mesoporous layered double hydroxides, said method comprising the steps of:

[0035] Step 1: Preparation of ordered mesoporous ZnTi-LDHs

[0036] S1. Add 5.04g of poloxamer into 100mL of deionized water, and stir vigorously at 60°C until completely dissolved;

[0037] S2, successively add 0.22mLTiCl 4 , 1.19gZn (NO 3 ) 2 ·6H 2 0 and 3g of urea are added to the mixed solution of step S1 and vigorously stirred until completely dissolved;

[0038]S3. Put the mixed solution in step S2 in an autoclave for aging for 48 hours at a temperature of 130° C., centrifuge the aged solution to obtain a precipitate, wash the precipitate with ethanol and deionized water several times in turn, and then place the precipitate at 60° C. Dry overnight at temperature;

[0039] S4. Grinding the dried solid first, then placing it in a muffle furnace at a temperature of 350° C. for 3 hours, and naturally cooling to ...

Embodiment 2

[0047] A method for controlling organic arsine pollution in water by using ordered mesoporous layered double hydroxides, said method comprising the steps of:

[0048] Step 1: Preparation of ordered mesoporous ZnTi-LDHs

[0049] S1. Add 5.04g of poloxamer into 100mL of deionized water, and stir vigorously at 60°C until completely dissolved;

[0050] S2, successively add 0.22mLTiCl 4 , 1.19gZn (NO 3 ) 2 ·6H 2 0 and 3g of urea are added to the mixed solution of step S1 and vigorously stirred until completely dissolved;

[0051] S3. Put the mixed solution in step S2 in a high-pressure reactor for aging at 120°C for 40 hours, centrifuge the aged solution to obtain a precipitate, wash the precipitate with ethanol and deionized water several times in turn, and then place the precipitate at 50°C Dry overnight at temperature;

[0052] S4. Grinding the dried solid first, then placing it in a muffle furnace for 3.5 hours at a temperature of 300° C., and cooling to room temperature ...

Embodiment 3

[0060] The ratio of the dosage mg of the ordered mesoporous ZnTi-LDHs in this embodiment to the volume L of raw water is 400-500:1, and other steps are the same as in Embodiment 1.

[0061] The removal rate of arsanic acid in this embodiment is 99.3%. Inorganic arsenic was not detected.

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Abstract

The invention belongs to the technical field of water treatment, and for the first time proposes a method for controlling organic arsine pollution in water by using a novel photocatalytic material-ordered mesoporous layered double hydroxide. Currently, UV / H oxidation technology for removing organic arsines in water 2 o 2 , UV / O 3 etc. have only realized the oxidative conversion of organic arsine to inorganic arsenic, but have not completely removed arsenic pollutants from water bodies. The ordered mesoporous ZnTi-LDHs of the present invention has interlayer anion exchange characteristics, extremely high specific surface area and rich three-dimensional pore structure, which can greatly improve photocatalytic activity and realize the simultaneous enrichment of releasing inorganic arsenic; the ordered mesoporous ZnTi-LDHs of the present invention Mesoporous ZnTi-LDHs can be recycled and reused after use, which reduces operating costs; the present invention is simple to operate and easy to implement; the method used in the present invention has a very low dissolution concentration of metal ions and minimal secondary pollution; the present invention can effectively The removal rate of arsanic acid in water is as high as 98%, and basically no inorganic arsenic is detected.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for photocatalytically removing organic arsine in water by using ordered mesoporous layered double metal hydroxides. Background technique [0002] Since the 1950s, western developed countries have used organic arsine preparations as feed additives in the aquaculture industry. In 1993, the Ministry of Agriculture of my country officially approved the production of arsanic acid (p-ASA), and in 1996 approved the use of roxarsine (ROX), and organic arsine preparations began to be widely used in my country. They have the effect similar to antibiotics, can improve feed utilization rate and conversion rate, enable animals to absorb more nutrients and thus improve the survival rate and daily weight gain rate of livestock and poultry, so they have been vigorously promoted and used at the beginning of their discovery . Organic arsine compounds are hardly meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/06B01J35/10B01J20/02B01J20/28B01J20/30C02F1/28C02F1/30C02F101/10C02F101/30
CPCB01J20/0211B01J20/0248B01J20/28083B01J23/06B01J35/0033B01J35/004B01J35/10B01J35/1004C02F1/281C02F1/30C02F2101/103C02F2101/30
Inventor 邓靖陈胜男蔡安洪阮书瑜陈吴傲啸徐梦苑邱春根
Owner ZHEJIANG UNIV OF TECH
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