Method for disposal of high-arsenic acid wastewater and recovery of iron element by external field strengthening copper residue

Abstract

The application provides a method for treating high-arsenic acid wastewater by external field reinforced copper residue and recycling iron elements, and relates to the technical field of heavy metal pollution treatment. 2+ / Fe 3+ dissolution reaction, then a catalyst, an oxidant and high-arsenic acid wastewater are added to the solution, an arsenic precipitation reaction is carried out under the action of ultraviolet irradiation and ultrasonic waves, and arsenic-containing precipitate and filtrate A are obtained; then oxygen is introduced into the filtrate A and ammonia water is added to carry out a hydrolysis reaction, and precipitate and filtrate B are obtained; then lime milk is added to the filtrate B to carry out a deep purification reaction, and precipitate sludge and clean water are obtained. The application introduces an external field to reinforce the arsenic precipitation and iron extraction technology of copper residue, which is simple in operation, short in reaction period, low in arsenic-containing precipitate amount and stable, has a remarkable arsenic removal effect, and has a purity of the obtained hydroxyl ferric oxide precipitate of greater than or equal to 90%, so that the metallurgical solid waste is treated by waste, valuable component resources are recycled, and remarkable economic benefits are achieved.