Abstract:Zero-valent iron(ZVI) was prepared from industrial solid waste sulfuric acid residue(SAR) and blast furnace ash(BFA) by carbothermic reduction and used to remove Cu2+ from wastewater. Effects of preparation conditions and reaction conditions on removal rate of Cu2+ were investigated. The results show that iron oxide in SAR and BFA can be reduced to ZVI using the reducibility of BFA, and Cu2+ from wastewater can be removed by ZVI. The removal effect of Cu2+ from wastewater can be optimized by rising BFA dosage and reduction temperature, and prolonging reduction time in a certain range. The ZVI obtained when BFA dosage is 50% and reduced at 1 200 ℃ for 60 min has best effect on removal of Cu2+ from wastewater, and the ZVI can be applied to wide range of pH value and high initial concentration of Cu2+. Cu2+ is reduced to Cu0 by ZVI and then adsorbed on the surface of ZVI to be removed. When ZVI dosage is 0.75 g/L, pH value and Cu2+ initial concentration of wastewater is 4 and 100 mg/L respectively, the removal rate of Cu2+ is 93.05%. This study can provide reference for comprehensive utilization of SAR and BFA and removal of Cu2+ from wastewater using ZVI.