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Method for removing arsenic and antimony in water body by using active base metal replacement

A base metal and active technology, applied in the field of active base metal replacement to remove arsenic and antimony in water, to achieve the effect of high efficiency, easy implementation and convenient operation

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

[0005] 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 to provide a green and efficient method for removing arsenic and antimony in water bodies by replacing active base metals. Base metals can effectively remove and recover arsenic and antimony in water without producing toxic gases such as arsine and antimony

Method used

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  • Method for removing arsenic and antimony in water body by using active base metal replacement

Examples

Experimental program
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Effect test

Embodiment 1

[0018] 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 iron powder (60 mesh) and 0.5g of ammonium citrate were added, the stirring speed was 400r / min, the reaction temperature was 40°C, and the replacement time was 10~120min.

[0019] Replacement efficiency was used to evaluate the replacement and removal effect of iron powder on arsenic and antimony in water.

[0020] Table 1 Experimental results of different replacement times

[0021] time / min

Embodiment 2

[0023] Take 200mL As(III) content is 3.6gL -1 , Sb(III) content is 5.8gL -1 The silver slag leaching solution is placed in the reactor, the pH of the solution is adjusted to 0 with hydrochloric acid, 10g of zinc powder (200 mesh) and 0.5g of ammonium citrate are added, the stirring speed is 400r / min, the reaction temperature is 40°C, and the replacement time is 10~120min.

[0024] Replacement efficiency was used to evaluate the replacement and removal effect of zinc powder on arsenic and antimony in water.

[0025] Table 2 Experimental results of different replacement times

[0026] time / min

[0027] 120

Embodiment 3

[0029] Take 200mL As(III) content is 8.2gL -1 , Sb(III) content is 13.8gL -1 The silver slag leaching solution is placed in the reactor, the pH of the solution is adjusted to 0 with hydrochloric acid, 10g of zinc powder (400 mesh) and 0.5g of ammonium citrate are added, the stirring speed is 400r / min, the reaction temperature is 40°C, and the replacement time is 10~120min.

[0030] Replacement efficiency was used to evaluate the replacement and removal effect of copper powder on arsenic and antimony in water.

[0031] Table 3 Experimental results of different replacement times

[0032] time / min

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Abstract

The invention provides a method for removing arsenic and antimony in a water body by using active base metal replacement. The method comprises the following steps: regulating the pH value of wastewater containing arsenic and antimony to be 0-3 by using an acid, adding active base metal powder and a complexing agent, stirring and reacting at a stirring speed of 100-600 revolutions per minute, and replacing at the temperature of 10 to 80 DEG C for 10-120 minutes, wherein in the wastewater containing arsenic and antimony, the content of As (III) is 0.1-10g / L, and the content of Sb (III) is 0.1-25g / L; the mass amount of the active base metal powder is 5-100g / L according to the volume of the wastewater; the mass amount of the complexing agent is 0.5-5g / L according to the volume of the wastewater; and the active base metal refers to one or a combination of more than two in iron, zinc and iron-zinc alloys according to an arbitrary ratio. According to the method disclosed by the invention, arsenic and antimony in the water body are effectively removed, toxic arsenic hydride and antimony hydride gases are avoided, and the process is simple, economical and environment-friendly.

Description

(1) Technical field [0001] The invention relates to a method for removing arsenic and antimony in water by active base metal replacement, and belongs to the technical field of heavy metal water treatment. (2) Background technology [0002] Arsenic and antimony are the constituent elements of the earth's crust and are widely distributed in nature. Among them, arsenic is mainly mixed in other metal ores in the form of sulfide, and antimony generally exists in the form of elemental substance, stibnite or stibnite. With the vigorous development of modern technology, the properties of arsenic and antimony have been continuously explored and utilized, and are now widely used in various fields. The mining and smelting of arsenic and antimony minerals and the wide application of arsenic and antimonides have caused increasingly severe arsenic and antimony pollution problems. Among them, the pollution of arsenic and antimony in water is the most harmful. Industrial wastewater is an ...

Claims

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Application Information

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