1 results about "Disodium arsenate" patented technology

This invention discloses a method for the simultaneous removal of arsenic and chlorine from waste acid based on sodium arsenite minerals, belonging to the field of wastewater treatment and resource recovery technology. The method includes: adding an oxidant to the waste acid solution; supplementing copper, sodium, calcium, and chlorine sources according to the stoichiometric ratio of sodium arsenite (NaCaCu₅(AsO₄)₄Cl·5H₂O); conducting a water bath heating reaction under stirring conditions; adjusting the pH of the solution; and inducing Na₂O. + Ca 2+ In situ, sodium arsenate precipitate (sodium arsenate chlorite) is formed by the coordination precipitation reaction of Cu²⁺, As(V), and Cl⁻. After solid-liquid separation, washing, and drying, the sodium arsenate chlorite mineral is obtained. This invention utilizes the coexistence of arsenic and chlorine in pollutants. By adjusting the ratio of key components and controlling the reaction conditions, both arsenic and chlorine are simultaneously introduced into the mineral lattice, achieving efficient removal and resource conversion of arsenic and chlorine. This invention achieves synergistic removal and resource utilization of pollutants, resulting in significant environmental and economic benefits.