The pollution hazards of heavy metals were investigated in sewage sludge collected from four wastewater treatment plantsin Nanchang City,China,including Honggutan(HGT),Chaoyang(CY),Qingshanhu(QSH)and Xianghu(XH).Conta...The pollution hazards of heavy metals were investigated in sewage sludge collected from four wastewater treatment plantsin Nanchang City,China,including Honggutan(HGT),Chaoyang(CY),Qingshanhu(QSH)and Xianghu(XH).Contamination/riskcharacteristics of heavy metals(Cu,Pb,Zn,Cd,Cr and Ni)were evaluated based on their leachable content,total content andchemical speciation.The sewage sludge from QSH contained higher total contents of heavy metals(except Pb)than those from HGT,XH and CY.The total contents of Cd and Ni were mostly beyond standard.Cu,Cr and Pb were predominantly present in potentialeffect and stable fractions.Zn and Ni showed higher bioavailability.Cd presented roughly uniform distribution into four fractions.The leaching contents of heavy metals almost exceeded the threshold values,especially for Zn and Ni.The potential ecological riskindexes of heavy metals in sewage sludge were4263.34?7480.26,indicating very high risks.Cd contamination is the major concern.展开更多
基金Project(20151BAB213024)supported by the Natural Science Foundation of Jiangxi Province,ChinaProject(GJJ14302)supported by the Scientific Research Fund of Jiangxi Provincial Education Department,ChinaProject(YC2015-S186)supported by the Jiangxi Province Innovation Foundation for Postgraduate,China
文摘The pollution hazards of heavy metals were investigated in sewage sludge collected from four wastewater treatment plantsin Nanchang City,China,including Honggutan(HGT),Chaoyang(CY),Qingshanhu(QSH)and Xianghu(XH).Contamination/riskcharacteristics of heavy metals(Cu,Pb,Zn,Cd,Cr and Ni)were evaluated based on their leachable content,total content andchemical speciation.The sewage sludge from QSH contained higher total contents of heavy metals(except Pb)than those from HGT,XH and CY.The total contents of Cd and Ni were mostly beyond standard.Cu,Cr and Pb were predominantly present in potentialeffect and stable fractions.Zn and Ni showed higher bioavailability.Cd presented roughly uniform distribution into four fractions.The leaching contents of heavy metals almost exceeded the threshold values,especially for Zn and Ni.The potential ecological riskindexes of heavy metals in sewage sludge were4263.34?7480.26,indicating very high risks.Cd contamination is the major concern.
