Zinc hydrometallurgy residue is one of the main sources of heavy metals in the environment. The chemical components and mineralogical characteristics of the reductive leaching residue was obtained by ICP-AES, XRD and SEM + EDS analysis. The results showed that the main heavy metals in the residue were Pb, Zn, Cd and As. Pb, Zn and Cd in the residue existed as PbSO₄, ZnS and CdS, respectively. The three-step sequential extraction procedure study showed that Zn and Cd mainly existed as oxidizable form; Pb and As mainly existed as the residue form. The leaching toxicity results using sulfuric acid and nitric acid method showed that the leaching toxicity of Zn and Cd exceeded the reference values. The potential ecological risk assessment results of heavy metals of the residue showed that the sequence of the environmental activity and ecological risk was Cd > Zn > As > Pb. Cadmium contributed to the potential risk index more greatly than any other heavy metal in the residue and the contribution rate reached 98.9%, which showed that the cadmium in the reductive leaching residue threw the greatest threat to the ecological environment.

湿法炼锌残余物是环境中重金属的主要来源之一。通过ICP-AES，XRD和SEM + EDS分析获得还原浸出渣的化学成分和矿物学特征。结果表明，残留物中的主要重金属为Pb，Zn，Cd和As。残留物中的Pb，Zn和Cd以PbSO _4的形式存在，ZnS和CdS。三步连续萃取法研究表明，Zn和Cd主要以可氧化形式存在；铅和砷主要以残留形式存在。硫酸和硝酸浸出毒性结果表明，锌和镉的浸出毒性超过了参考值。残留重金属的潜在生态风险评估结果表明，环境活动和生态风险的顺序为Cd> Zn> As> Pb。镉比其他重金属对潜在风险指数的贡献更大，贡献率达到98.9％，这表明还原浸出渣中的镉对生态环境的威胁最大。