摘要
为探明某燃煤耦合污泥电厂固废中重金属污染程度及人体健康风险,分析了固废中As、Cr、Cu、Cd、Hg、Ni、Pb和Zn的含量,利用潜在生态风险及健康风险评价模型评估重金属的生态危害及人体健康风险.结果表明:污泥掺烧飞灰、底灰中As、Hg、Cd、Cu、Zn含量高于无污泥掺烧.飞灰对环境的潜在生态危害程度高,Cd和Hg是主要污染元素.健康风险评价结果表明经口摄入是造成风险的主要途径,As是致癌风险的主要因素,儿童风险均高于成人.
Abstract
To investigate the extent of heavy metals contamination and human health risks in the solid wastes of a coal-fired coupled sludge power plant,the concentrations of As,Cr,Cu,Cd,Hg,Ni,Pb and Zn were analyzed.The ecological hazards and human health risks of heavy metals were assessed using the potential ecological risk and health risk evaluation model.The results showed that the contents of As,Hg,Cd,Cu and Zn in the fly ash and bottom ash increased after blending with sludge.The potential ecological hazards of heavy metals in fly ash to the environment were at a high level,with Cd and Hg were the main polluting elements.Oral intake was the main route of risk,As was the main factor of cancer risk,and children had a higher risk than adults.
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