欢迎来到天天文库
浏览记录
ID:58138171
大小:378.39 KB
页数:6页
时间:2020-04-24
《合肥及周边城市污水污泥重金属含量和农用潜在生态风险评价-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、安徽农业大学学报,2011,39(2):280.285JournalofAnhuiAgriculturalUniversity网络出版时间:2011-10.2510:31[URL】http://www.cnki.net/kcms/detail/34.1162.S.20111025.1031.030.html合肥及周边城市污水污泥重金属含量和农用潜在生态风险评价张蓉,谢贻兵,花日茂,李学德(安徽农业大学资源与环境学院,安徽省高校农产品安全重点实验室,合肥230036)摘要:测定合肥市及周边蚌埠,阜阳,黄山,宿州等城市7个污水处理厂污泥
2、、生物反应器活性污泥及污水中5种重金属Pb,Cr,Cu,Zn,Cd的含量;计算污水处理厂对污水中重金属的去除,及污泥重金属去除负荷;参比安徽省土壤重金属元素背景值和全球土壤沉积物重金属元素平均值,用潜在生态危害指数法对污泥中重金属作毒性分析、污染程度评价和潜在生态风险评价;对比国家污泥农用标准,给出污泥农用建议。结果表明不同背景值下,污染程度和潜在生态风险评价差异较大,以安徽省土壤重金属元素含量为背景值评价,单因子Cd的污染程度“极强”,使潜在生态风险处在“很强”范围;以全球土壤沉积物重金属含量平均值为背景值,评价潜在生态风险只有部
3、分样品处在“很强”范围。关键词:活性污泥;重金属;农业利用;潜在生态风险中图分类号:X703文献标识码:A文章编号:1672—352X(2012)02—0280—06InvestigationofheavymetalscontainedinsewagesludgefrommunicipalwastewatertreatmentplantsfromfivecitiesandevaluationontheirpotentialecologicalrisksinagriculturalutilizationZHANGRong,XIEYi—
4、bing,HUARi-mao,LIXue—de(KeyLabofArgo—foodSafetyofAnhuiProvince,SchoolofResourcesandEnvironment,AnhuiAgriculturalUniversity,Hefei230036)Abstract:DeterminationwereconductedoffiveheavymetalscontentOfPb,Cr,Cu,Zn,andCdinsewagesludgefrommunicipalwastewater仃eatmentplants.theb
5、iologicalreactionsandthewasterWaterinHefei.Bengbu.Fuyang.andHuangshancityTheheavymetalsremovalratesandsludgeremovalloadsofheavymetalwerecalcu—lated.Comparedwiththebackgroundvaluesofheavymetalsinsoi1ofAnhuiprovinceandaveragebackgroundval—uesOfmatinEarthsediment.thetoxic
6、itiesofheavymetalswereanalyzed.Theirpollutionlevelsandpotentialeco.1ogicalriskwereevaluatedusingpotentialecologicalriskindex.Someadvicesonagriculturalapplicationofthesewagesludgeweregivenaccordingtothenationalstandards.Theresultsindicatethatthepollutionlevelsandpo—tent
7、ialecologicalriskweredifierentcomparedwithdiferentbackgroundvalues.ThepollutionleveloffactorofCdwasveryseriOUScomparedwiththebackgroundvalueinAnhuiprovinceleadingtotheseriOUSpotentialecologicalriskofthesewagesludge.whilepansofthemwereseriOUScomparedwiththatinEarthsedim
8、ent.Keywords:sewagesludge;heavymetal;agriculturalutilization;potentialecologicalrisk城市污水污泥含丰富的氮N、磷P、钾Ka和有要方式[3-6]。各国政
此文档下载收益归作者所有