【摘要】 有色金属冶炼过程中产生的高砷污酸酸度大、杂质复杂，传统钠基硫化剂（如Na₂S、NaHS）虽能高效除砷，但会引入钠离子，增加后续处理成本，且存在H₂S逸出风险。本研究提出采用单斜晶FeS处理污酸，利用其高比表面积、低溶度积及稳定释放S^2-的特性，在S/As摩尔比3.75、40℃反应180 min的条件下，使砷浓度从1 889 mg·L^-1降至1.54 mg·L^-1，除砷率达99.92%，满足工业要求。XRF、XRD、XPS、SEM表征分析表明，As（Ⅲ）以As₂S₃沉淀形式去除，FeS的针状表面结构增强了反应效率，同时减少H₂S排放，降低环境风险。更多还原

【Abstract】 Non-ferrous metal smelting produces high-arsenic waste acid with strong acidity and complex impurities.Traditional sodium-based sulfiding agents（e.g., Na₂S, NaHS） efficiently remove arsenic but introduce sodium ions, increasing subsequent treatment costs and posing H₂S emission risks. This study proposes using monoclinic FeS for arsenic removal, leveraging its high surface area, low solubility product, and stable S^2- release. Under optimal conditions（S/As molar ratio 3.75, 40 ℃, 180 min）, arsenic concentration decreased from 1 889 mg·L^-1 to 1.54 mg·L^-1, achieving a 99.92% removal rate, meeting industrial standards. XRF, XRD, XPS, and SEM characterization analyses indicate that As（Ⅲ） is removed in the form of As₂S₃ precipitate. The needle-like surface structure of FeS enhances reaction efficiency while reducing H₂S emissions, thereby lowering environmental risks.更多还原