| abstract |
The invention provides a treatment method for arsenic-containing wastewater, which comprises the following steps: adding an oxidant to the arsenic-containing wastewater, stirring and reacting, filtering after the reaction is completed, removing the filter residue, and the filtrate enters the subsequent treatment; pouring the filtrate into a microwave reactor, Turn on the microwave and heat up, then slowly add iron salt dropwise to carry out arsenic precipitation reaction under the condition of pH 2～3, after the reaction is completed, carry out thermal insulation aging, then filter to obtain low arsenic waste water solution and filter residue, and the filter residue is scorodite ; Add a neutralizer to the low-arsenic wastewater solution to adjust the pH value, and then add iron salt to deeply remove the residual arsenic in the low-arsenic wastewater, and the filtrate obtained after filtering is the wastewater after arsenic removal. The treatment method of the present invention utilizes microwaves to assist in the treatment of arsenic-containing wastewater, which effectively improves the wastewater treatment efficiency, effectively reduces the consumption of iron salts in the subsequent deep arsenic removal process, and achieves a reduction in the amount of hazardous waste and a further reduction in cost. |