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首页> 外文期刊>Journal of environmental science and health, Part A. Toxic/hazardous substances & environmental engineering >Ecological risk assessment of sewage sludge from municipal wastewater treatment plants: a case study
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Ecological risk assessment of sewage sludge from municipal wastewater treatment plants: a case study

机译：市政污水处理厂污水污泥生态风险评估：以城市污水处理厂为例

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The aim of this study was to characterize sewage sludge from mechanical-biological wastewater treatment plants (WWTPs) in terms of total concentrations of heavy metals (HMs) and their distribution. Moreover, HM mobility, stability and ecological risk were assessed by calculating the mobility factor (MF), the reduced partition index (I-r) and the ecological risk index (ERI). Hierarchical cluster analysis (CA) was used to group the HMs in the sludges on the basis of their MF, I-r and ERI. The concentration of HMs decreased in the following order: Zn Cu Ni Pb Cd. HM mobility, as indicated by the MF values, was as follows: 18.7-30.6 (Zn), 8.1-36.4 (Ni), 6.8-11.1 (Cu), 3.2-32.2 (Pb) and 0 (Cd). Based on the average I-r values, the stability of the metals in the sludge increased in this order: Zn (0.23)=Pb (0.23)Cd (0.45)=Cu (0.45)Ni (0.69). Despite the high mobility of some metals, each sewage sludge had low environmental risk, as indicated by the ERI (ERI MUCH LESS-THAN 150). The HMs were more similar in terms of their mobility (two clusters) than in terms of their ecological risk (three clusters).
机译：本研究的目的是根据重金属 （HM） 的总浓度及其分布来表征机械生物废水处理厂 （WWTP） 的污水污泥。此外，通过计算迁移系数（MF）、减少分配指数（I-r）和生态风险指数（ERI）来评估HM流动性、稳定性和生态风险。采用层次聚类分析（CA）对污泥中的HMs进行MF、I-r和ERI分组。HMs浓度依次为Zn>Cu>Ni>Pb>Cd，HM迁移率由MF值表示：18.7%-30.6%（Zn）、8.1%-36.4%（Ni）、6.8%-11.1%（Cu）、3.2%-32.2%（Pb）和0%（Cd）。根据平均I-r值，污泥中金属的稳定性依次增加：Zn（0.23）=Pb（0.23）

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