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Method for removing and recovering arsenic and antimony in water body by replacement of copper powder

A technology of copper powder and water body, applied in chemical instruments and methods, metallurgical wastewater treatment, water/sewage treatment, etc., to achieve the effect of easy realization, renewable utilization of resources, and high efficiency

Active Publication Date: 2015-04-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies of the prior art in the treatment of arsenic and antimony pollution in water bodies, and provide a method for copper powder replacement and removal and recovery of arsenic and antimony in water bodies. Can effectively remove and recover arsenic and antimony in water

Method used

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  • Method for removing and recovering arsenic and antimony in water body by replacement of copper powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 200mL As(III) content is 3.6gL -1 , Sb(III) content is 5.8gL -1 The silver slag leaching solution was placed in the reactor, the pH of the solution was adjusted to 0 with hydrochloric acid, 10g of copper powder (200 mesh) was added, the reactor was closed after nitrogen gas was introduced, the stirring speed was 400r / min, and the reaction temperature was 40°C. The time is 10-120 minutes.

[0021] Replacement efficiency was used to evaluate the replacement and removal effect of copper powder on arsenic and antimony in water.

[0022] Table 1 Experimental results of different replacement times

[0023] time / min

Embodiment 2

[0025] Take 200mL As(III) content is 8.2gL -1 , Sb(III) content is 13.8gL -1 The silver slag leaching solution was placed in the reactor, the pH of the solution was adjusted to 0 with hydrochloric acid, 10g of copper powder (400 mesh) was added, the reactor was closed after nitrogen gas was introduced, the stirring speed was 400r / min, and the reaction temperature was 40°C. The time is 10-120 minutes.

[0026] Replacement efficiency was used to evaluate the replacement and removal effect of copper powder on arsenic and antimony in water.

[0027] Table 2 Experimental results of different replacement times

[0028] time / min

[0029] 10

Embodiment 3

[0031] Take 200mL As(III) content as 0.1gL -1 , Sb(III) content is 0.5gL -1 surface water in the reactor, adjust the pH of the solution to 0 with hydrochloric acid, add 5g of copper powder (60 mesh), and seal the reactor after feeding nitrogen gas, the stirring speed is 400r / min, the reaction temperature is 40°C, and the replacement time is 10~120min.

[0032] Replacement efficiency was used to evaluate the replacement and removal effect of copper powder on arsenic and antimony in water.

[0033] Table 3 Experimental results of different replacement times

[0034] time / min

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Abstract

The invention provides a method for removing and recovering arsenic and antimony in a water body by replacement of copper powder. The method comprises the following steps: (1) adjusting the pH of arsenic and antimony-containing wastewater to 0-3 by using hydrochloric acid; under nitrogen protection, adding copper powder, closing a reactor and stirring at a speed of 100-600r / minute to react, wherein the reaction temperature is 10-80 DEG C and the replacement time is 10-120 minutes; in the arsenic and antimony-containing wastewater, the content of As(III) is 0.1-10g / L and the content of Sb(III) is 0.1-25g / L; the use level of the copper powder is 5-100g / L based on the volume of the wastewater by mass; and (2) after replacement, filtering the reaction system, recovering filter residues and crystals which are obtained by recrystallizing the filtrate quickly at a low temperature. The method provided by the invention is simple in process, free of secondary pollution and economical and environment-friendly, and reproducible utilization of resources is achieved.

Description

(1) Technical field [0001] The invention relates to a method for removing and recovering arsenic and antimony in water by copper powder replacement, and belongs to the technical field of heavy metal water treatment. (2) Background technology [0002] The vigorous development of modern industry has brought unprecedented material abundance and convenience, but it has also produced a large amount of industrial wastewater, resulting in increasingly severe environmental pollution, which seriously threatens the ecological environment and biological safety. Especially industrial wastewater containing pollutants such as arsenic and antimony is highly toxic and extremely harmful. Therefore, it is urgent to purify and treat heavy metal ions such as arsenic and antimony in wastewater. In addition, arsenic and antimony in surface water in some areas also seriously exceeded the standard. Heavy metals such as arsenic and antimony in water are very harmful, and have become the key polluti...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F1/52
CPCC02F1/58C02F1/62C02F2103/16
Inventor 伍廉奎郑国渠曹华珍
Owner ZHEJIANG UNIV OF TECH
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