摘要
分别选择市区污泥、县城污泥、腐熟污泥作为研究对象,开展污泥重金属含量、生态风险及人体健康风险评价,为污泥资源化利用提供依据。结果表明:同类污泥中重金属平均含量均排序为锌(Zn)>铜(Cu)>铬(Cr)>砷(As)>铅(Pb)>镉(Cd)>汞(Hg),只有市区污泥中As的含量超过农用泥质A级标准(CJ/T 309—2009)。Cu、Zn、Cr、Cd在3类污泥中的含量、单因子污染指数和单因子潜在生态风险指数的平均值都表现为腐熟污泥>市区污泥>县城污泥。腐熟污泥、市区污泥、县城污泥中重金属内梅罗综合污染指数平均值分别为4.684、1.995、1.145,分别为重污染、轻度污染、轻度污染,腐熟污泥、市区污泥、县城污泥重金属综合潜在生态风险指数平均值分别为321.06、214.49、106.08,相应的综合潜在生态风险程度分别为重、中等、低。基于健康风险评价模型进行成人健康风险评价,腐熟污泥、市区污泥、县城污泥对成人非致癌综合危害指数分别为1.10×10^(-1)、5.13×10^(-2)、2.58×10^(-2),重金属多因子致癌综合危害指数分别为3.39×10^(-5)、4.77×10^(-5)、1.87×10^(-5)。县城污泥无论是生态风险还是对人类健康风险都最低。
In order to provide references for reclamation of sludge resource,selected urban sludge,county sludge and composted sludge as objects,heavy metal content,ecological risk evaluation and human health risk evaluation were conducted.The results showed that,the order of average content of heavy metal in same sludge was Zn>Cu>Cr>As>Pb>Cd>Hg,only the content of As in urban sludge exceeded the limit of agricultural argillaceous grade A standard(CJ/T 309-2009).The order of content,single factor pollution index and single factor potential ecological risk index of Cu,Zn,Cr,Cd in 3 types of sludge were composted sludge>urban sludge>county sludge.The average value of Inner melo comprehensive pollution index of heavy metal of composted sludge,urban sludge,country sludge were 4.684、1.995、1.145 respectively,which belong to heavy pollution,slightly pollution,slightly pollution respectively.The average value of comprehensive potential ecological risk index of heavy metal of composted sludge,urban sludge,country sludge were 321.06,214.49,106.08 respectively,comprehensive potential ecological risk degree were serious,medium,low respectively.The health risk of adults was assessed based on the health risk assessment model,the comprehensive non-carcinogenic index of composted sludge,urban sludge,country sludge were 1.10×10^-1,5.13×10^-2,2.58×10^-2 respectively,and multi-factor comprehensive carcinogenic index of heavy metal of composted sludge,urban sludge,country sludge were 3.39×10^-5,4.77×10^-5,1.87×10^-5 respectively.The county sludge has the lower ecological risk and human health risk.
作者
常会庆
焦常锋
郑彩杰
吴杰
王启震
朱晓辉
徐晓峰
CHANG Huiqing;JIAO Changfeng;ZHENG Caijie;WU Jie;WANG Qizhen;ZHU Xiaohui;XU Xiaofeng(Henan University of Science and Technology,Luoyang 471003,China)
出处
《河南农业科学》
北大核心
2019年第3期70-76,共7页
Journal of Henan Agricultural Sciences
基金
国家重点研发计划项目(2017YFD0801300)
国家自然科学基金面上项目(41571319)
河南省科技公关项目(172102310181)
关键词
污泥
重金属
生态风险
健康风险
评价
Sludge
Heavy metal
Ecological risk
Health risk
Assessment
