Li Ji, Luo Guobing, Xu Jing
School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, China.
Wuxi City Water Supply and Drainage Monitoring Station, Wuxi, 214023, China.
Bull Environ Contam Toxicol. 2019 Feb;102(2):259-267. doi: 10.1007/s00128-018-2525-z. Epub 2019 Jan 2.
The concentrations of nutrients (total nitrogen, total phosphorus and organic matter) and metals (Cu, Pb, Zn, Ni, Cd, Cr, As and Hg) in sewage sludge samples were determined to evaluate the level of contamination. Sewage sludge samples were collected from ten wastewater treatment plants from 2016 to 2018 in Wuxi city, China. All the studied sewage sludge samples displayed high fertility properties due to their richness. Total concentrations of metals in the sewage sludge samples were within the regulation of the Chinese legislation. The levels of the eight metals temporally varied. Sewage sludge pollution assessment was undertaken using pollution index, geo-accumulation index, potential ecological risk index and aggregative toxicity index. Multivariate statistical analysis indicated that Pb, Cr, As and Hg may have similar transport behavior and derive from anthropogenic sources. Ecological risk assessment revealed that Hg contamination is the major concern for human health, since the treated sewage sludge is used for agricultural purposes.
测定了污水污泥样品中营养物质（总氮、总磷和有机物）和金属（铜、铅、锌、镍、镉、铬、砷和汞）的浓度，以评估污染水平。2016年至2018年期间，从中国无锡市的10个污水处理厂采集了污水污泥样品。所有研究的污水污泥样品因其丰富性而表现出高肥力特性。污水污泥样品中金属的总浓度在中国立法规定范围内。这八种金属的含量随时间变化。采用污染指数、地累积指数、潜在生态风险指数和综合毒性指数对污水污泥污染进行评估。多变量统计分析表明，铅、铬、砷和汞可能具有相似的迁移行为，且来源于人为源。生态风险评估表明，由于处理后的污水污泥用于农业目的，汞污染是人类健康的主要担忧。
