Yuan Shijie, Yang Guodong, Zhang Xilong, Luo Siya, Yan Jie, Yu Zhaoqin, Dong Hanchuan, Zhou Yi
College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China.
Hubei Provincial Key Laboratory of Efficient Utilization and Blocking of Metallurgical Mineral Resources, Wuhan University of Science and Technology, Wuhan, 430081, China.
Environ Monit Assess. 2025 May 6;197(6):630. doi: 10.1007/s10661-025-14063-w.
Developing the metal recycling industry to meet the demand for green resource recycling and utilization has raised environmental concerns. However, long-term processing and stacking of waste heavy metals (HMs) may lead to negative impacts on the soil environment. This study investigated the distribution of HMs such as, Cd, Cu, Pb, Hg, Ni, Co, and V, in soil from metal-recycling sites. A total of 63 soil samples were collected to assess the degree of soil contamination by HMs and trace the sources of HMs. The single pollution index was calculated based on the background values of reference elements to determine the level of HMs pollution. Except for As, the average concentrations of seven HMs in the surface soil exceeded their background values. It is worth noting that according to the geo-accumulation index (I) and pollution load index (PLI) revealed that Hg, Cu, and Pb exhibited relatively high pollution levels, while the potential ecological risk index (RI) and Nemerow risk index (NRI) indicated that Hg and Cd posed higher ecological risks. The source apportionment results indicate that As, Cd, Cu, Pb, and Hg have significant homology, mainly derived from the composite source of human activities and natural sources; V mainly comes from industrial process sources; Ni and Hg mainly come from atmospheric deposition sources; Co is mainly influenced by natural factors. This study provides reference for implementing pollution control measures and promoting precise remediation work in areas affected by metal recycling activities.
发展金属回收行业以满足绿色资源回收利用需求引发了环境问题。然而，废弃重金属（HMs）的长期处理和堆放可能会对土壤环境产生负面影响。本研究调查了金属回收场地土壤中镉、铜、铅、汞、镍、钴和钒等重金属的分布情况。共采集了63个土壤样本，以评估土壤受重金属污染的程度并追踪重金属来源。基于参考元素的背景值计算单污染指数，以确定重金属污染水平。除砷外，表层土壤中七种重金属的平均浓度均超过其背景值。值得注意的是，根据地累积指数（I）和污染负荷指数（PLI）显示，汞、铜和铅呈现出较高的污染水平，而潜在生态风险指数（RI）和内梅罗风险指数（NRI）表明汞和镉构成较高的生态风险。源解析结果表明，砷、镉、铜、铅和汞具有显著同源性，主要来源于人类活动和自然源的复合源；钒主要来自工业过程源；镍和汞主要来自大气沉降源；钴主要受自然因素影响。本研究为金属回收活动影响地区实施污染控制措施和推进精准修复工作提供了参考。
