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Method for removing arsanilic acid in water by adopting ferromanganese oxide material

A technology of ferromanganese oxide and assulfuric acid, which is applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of lack of assulfuric acid treatment technology, reduce the total arsenic concentration, and achieve high removal efficiency. Effect

Active Publication Date: 2020-08-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is still a lack of economical and efficient arsanic acid treatment technology

Method used

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  • Method for removing arsanilic acid in water by adopting ferromanganese oxide material
  • Method for removing arsanilic acid in water by adopting ferromanganese oxide material
  • Method for removing arsanilic acid in water by adopting ferromanganese oxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The preparation of embodiment 1 ferromanganese oxide material

[0057] In a clean 100mL beaker, add 59.4mg of manganous chloride tetrahydrate and 1.2g of polyvinylpyrrolidone K30, add 40mL of deionized water, and stir to dissolve. Take another clean 2mL centrifuge tube, add 64.2mg of potassium ferricyanide, add 150μL of deionized water, and ultrasonically dissolve. The entire solution in the 2mL centrifuge tube was quickly injected into the aforementioned 100mL beaker with a pipette gun, stirred rapidly at 700rpm for 30min, and left to age for 24h after the stirring was stopped. Centrifuge at 7000rpm for 3min, and discard the supernatant. Wash twice with 30mL of deionized water and twice with 30mL of 1:1 ethanol / water mixed solution, ultrasonically disperse the solid during each wash, then centrifuge at 7000rpm for 3min, and pour off the supernatant. Finally, the centrifuged product was dried in a vacuum oven at 60° C. for 24 hours to obtain the Prussian blue analogue...

Embodiment 2

[0059] The application of embodiment 2 ferromanganese oxide material to remove arsanic acid in water

[0060] Add the ferromanganese oxide material obtained in Example 1 into the solution with 10 mg / L arkanic acid as the treatment object, and the dosage is 0.4 g / L, and ultrasonically disperse. Add acetic acid / sodium acetate buffer solution to make the pH value of the solution about 4, and the dosage is 20mmol / L (calculated by acetate ion). Stir at 700 rpm. The removal rate of arsanic acid can reach 75.4% within 30 minutes; the removal rate of As element in the solution can reach 74.8% within 30 minutes.

Embodiment 3

[0061] Example 3 Application of persulfate-enhanced ferromanganese oxide material to remove arsanic acid in water

[0062] In order to obtain a better removal effect of arkanic acid and As elements in the solution, peroxymonosulfate was added to the solution after stirring for 30 minutes in Example 2, and the dosage was 0.2 g / L. The stirring speed was maintained at 700 rpm. The removal rate of arsanic acid can reach 99.0% within 1 hour; the removal rate of As in the solution can reach 95.2% within 1 hour.

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Abstract

The invention provides a method for removing arsanilic acid in water by using a ferromanganese oxide material, which comprises the following steps: adding the ferromanganese oxide material into watercontaining arsanilic acid, regulating the pH value to be acidic, and adding peroxymonosulfate. According to the method, the ferromanganese oxide material is used for removing the arsanilic acid in water, and the method has the characteristics that the removal efficiency is high, the total arsenic concentration in water is synchronously reduced, the material can be recycled, and the removal efficiency is less interfered by substances such as chloride ions and humic acid.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for removing arsanic acid in water by using ferromanganese oxide materials. Background technique [0002] In the past few decades, phenylarsenic acid compounds such as arsanic acid have been widely used as feed additives to promote the growth of livestock and poultry and prevent them from being infected with diseases during their growth. After these phenylarsenic acid compounds are ingested by poultry and livestock, they can hardly be metabolized and transformed in the animal body, so they will directly enter the nature through feces or urine. It is estimated that tens of thousands of tons of phenylarsenic acid compounds are discharged into the environment from poultry and pig farms around the world every year. Although phenylarsenic acid compounds are not highly toxic, they will be transformed into more toxic inorganic arsenic in the environmen...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/06B01J20/30C02F101/38
CPCC02F1/281B01J20/06C02F2303/16C02F2101/38
Inventor 俞汉青柯明坤黄贵祥
Owner UNIV OF SCI & TECH OF CHINA
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