Method of removing arsenic from acid arsenic-containing solution

Abstract

The invention discloses a method of removing arsenic from an acid arsenic-containing solution. The method comprises the following steps: the pH value of the acid arsenic-containing solution is adjusted to be 1.0-5.0, an iron-containing material and an oxidizing agent are added, the temperature of the solution is controlled at 25-90 degrees, after reaction, ferric arsenate sediment and arsenic-removed post liquid are obtained, and the removal of arsenic is realized. When copper contained in the acid arsenic-containing solution is greater than or equal to 0.2g / L, iron powder replacement copper removal treatment is required to be carried out first. The method has the advantages that the method is simple in process, low in cost and high in arsenic removal rate and obtained ferric arsenate sediment is stable; valuable metals can be recycled effectively; and the method has very high practicability and economic value.

Description

technical field

[0001] The invention relates to a method for removing arsenic from an acidic arsenic-containing solution, in particular to a method for removing arsenic from nonferrous metallurgy or chemical industry, such as copper fume, black copper slag, high-arsenic-lead fume, antimony smelting high-arsenic fume, tin smelting fume, A method for removing arsenic from gold smelting arsenic-containing fumes and other arsenic-containing waste materials in acidic leaching solutions, especially a method for removing arsenic in the solution in the form of iron arsenate under low pH conditions. Background technique

[0002] Arsenic is a non-metal, and almost all arsenic and its compounds are highly toxic. The state of arsenic in nature is stable, and the toxicity of trivalent arsenic in the environment is 60 times higher than that of pentavalent arsenic. my country is currently one of the countries with the most serious arsenic pollution in the world, and the situation of pollu...

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