汕头市城市污水处理厂污泥中重金属污染及生态风险研究  

Study on Heavy Metal Pollution and Ecological Risk in Shantou Municipal Wastewater Treatment Plant

作　　者：雷小楠 Lei Xiaonan(Shantou Municipal Sewage Treatment and Management Center,Shantou 515041,China)

机构地区：[1]汕头市城市污水处理管理中心,广东汕头515041

出　　处：《广东化工》2023年第15期119-121,125,共4页Guangdong Chemical Industry

摘　　要：调研了汕头市8座具有代表性的城市生活污水处理厂污泥中10种重金属(Se、Ni、Cr、Cu、Zn、Pb、Cd、Ba、As、Hg)含量,并分析了污泥中重金属潜在生态风险情况及污泥的再利用情况。结果表明,各厂污泥中Ni、Cr等8种重金属含量均符合国家排放标准并低于全国城市污泥平均值;各厂污泥综合生态风险指数(RI)的排序为:CYCQ(3294.10)>XS(2120.50)>BZ(238.66)>HJ(176.50)>NQ(129.53)>LZ(62.66)>XX(23.11)>QY(19.29),其中,CYCQ、XS厂污泥处于高风险水平,BZ、HJ厂处于中风险水平,其他各厂均处于低风险水平;各厂污泥重金属指标均能达到城镇污水处理厂污泥处置园林绿化用泥质标准,污泥经过适当处理后可以用于园林绿化。The concentration of 10 heavy metals(Se,Ni,Cr,Cu,Zn,Pb,Cd,Ba,As,Hg)in sewage sludge samples form 8 municipal wastewater treatment plants in Shantou were investigated.The feasibility and potential risk of sludge reuse in gardens or parks were evaluated.The result showed that amount of 8 kinds of heavy metals such as Ni and Cr,in sewage sludge of Shantou city sewage treatment plant,were lower than Discharge Standard of pollutant pollutants for municipal wastewater and national mean value.The integrated-factor potential ecological risk index of the sludge presented as CYCQ(3294.10)>XS(2120.50)>BZ(238.66)>HJ(176.50)>NQ(129.53)>LZ(62.66)>XX(23.11)>QY(19.29).The potential ecological risk assessment shows that the sludge hazard of BZ、HJ sewage treatment plant were medium risk,CYCQ and XS sewage treatment plant were highest potential ecological risk,and the sludge of other sewage treatment plants is low risk.The content of metals was not exceeding the maximum allowable content of the disposal of sludge from municipal wastewater treatment plant for greening use.The heavy metal was relatively safe in greening gardens or parks use.

关 键 词：污泥 重金属 污染 潜在生态风险 

分 类 号：X703[环境科学与工程—环境工程]