摘要
为了揭示生态净化工程中的重金属污染特征,在苏南多个污水处理厂尾水生态净化工程采集了底泥和植物样本,测定其中常规污染指数及重金属元素含量,分析了生态处理中重金属的分布特性,并评价了其潜在生态风险。结果表明,底泥中重金属的生态风险较低,其中镉的生态风险达到了中等水平。虽然低污染水中的重金属浓度平均值较低,但鉴于污水处理量较大,植物对重金属的富集指数高于一般陆生植物。
In order to reveal the characteristics of heavy metal pollution in ecological purification system,plants and sediment samples were collected from the system which received tail water from five sewage treatment plants in Southern Jiangsu,heavy metals and other index were detected,the distribution characteristics of heavy metals were analyzed,and potential ecological risks were evaluated.The results show that the ecological risk of most heavy metals in sediment is low,among which the ecological risk of cadmium reaches a medium level.Although the average concentration of heavy metals in water is low,the enrichment index of heavy metals in plants is higher than that in terrestrial plants due to the large amount of sewage treated.
作者
王刚
Wang Gang(Nanjing University(Suzhou)High-tech Research Institute,Suzhou Jiangsu 215123,China)
出处
《环境与发展》
2020年第7期15-17,共3页
Environment & Development
关键词
生态净化工程
重金属
生态风险
Ecological purification system
Heavy metals
Ecological risk
