太原市小店污灌区土壤重金属和多环芳烃复合污染现状评价
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摘要
为调查太原市小店污灌区农田重金属和多环芳烃的污染状况,研究测定了45个土壤样品Pb,Cd,Cr,Hg,As以及PAHs的含量,并采用潜在生态风险评价的方法进行评价。结果表明,与背景值相比,小店污灌区土壤普遍存在污染现象,土壤中As,Hg,Cd,Cr,Pb和PAHs最高含量分别是背景值的5.46,9.71,11.72,2.26,2.74,23.87倍;利用潜在生态危害指数法评价得出,Hg,Cd为小店污灌区主要危害因子,单因子潜在生态危害系数在120~320之间;小店污灌区的潜在生态危害指标为371.48,为较强生态危害。
45 soil samples in farmland collected from Xiandian sewage irrigation area in Taiyuan were monitored for the contents of Pb,Cd,Cr,Hg,As,PAHs and analyzed by the potential ecological risk assessment method.The result indicates that the maximum contents of As,Hg,Cd,Cr,Pb and PAHs were 5.46,9.71,11.72,2.26,2.74 and 23.87 times higher than the soil background values.The single potential ecological risk index ranged between 120 and 320.The ecological risk of Xiaodian sewage irrigation is serious,with the potential ecological risk index of 371.48,which was ranged as strong ecological risk.
45 soil samples in farmland collected from Xiandian sewage irrigation area in Taiyuan were monitored for the contents of Pb,Cd,Cr,Hg,As,PAHs and analyzed by the potential ecological risk assessment method.The result indicates that the maximum contents of As,Hg,Cd,Cr,Pb and PAHs were 5.46,9.71,11.72,2.26,2.74 and 23.87 times higher than the soil background values.The single potential ecological risk index ranged between 120 and 320.The ecological risk of Xiaodian sewage irrigation is serious,with the potential ecological risk index of 371.48,which was ranged as strong ecological risk.
引文
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[15]栗献锋.太原市污灌区土壤重金属分布特征及风险评价[J].山西农业科学,2012,40(7):742-746,774.
[2]解静芳,郭晓君,杨彪.污水灌溉和镉胁迫对菠菜品质的影响[J].华北农学报,2010,25(1):204-207.
[3]王永强,李诗殷,蔡信德.中国农田污水灌溉研究进展[J].天津农业科学,2010,16(4):77-80.
[4]张福金,尤芙云,刘建平,等.内蒙古城郊菜地土壤重金属污染状况分析[J].内蒙古农业科技,2008(5):74-75.
[5]王祖伟,张辉.天津污灌区土壤重金属污染环境质量与环境效应[J].生态环境,2005,14(2):211-213.
[6]李名升,佟连军.辽宁省污灌区土壤重金属污染特征与生态风险评价[J].中国生态农业学报,2008,16(6):1517-1522.
[7]郭晓君.太原市污灌区土壤重金属生态风险评价研究[D].太原:山西大学,2010.
[8]张乃明,张守,武丕武.山西太原污灌区农田土壤汞污染状况及其生态效应[J].土壤通报,2010,32(2):95-96.
[9]解文艳,樊贵盛,周怀平,等.太原市污灌区土壤重金属污染现状评价[J].农业环境科学学报,2011,30(8):1553-1560.
[10]刘光崧.中国生态系统研究网络观测与分析标准:土壤理化分析与剖面描述[M].北京:中国标准出版社,1996:79-85.
[11]Tao S,Cui Y H.Determination of PAHs in wastewater irrigated a-gricultural soil using accelerated solvent extraction[J].Journal ofEnvironmental Science and Health,2002,37:141-150.
[12]邢承玉,张成锁.太原市污灌区土壤重金属含量特征及评价[J].农业环境与发展,2007,24(6):103-106.
[13]杜斌,孙强,祁志冲,等.太原市小店污灌区土壤重金属污染现状评价[J].中北大学学报:自然科学版,2011,32(3):329-335.
[14]Hakanson L.An ecological risk index for aquatic pollution con-trol-A sedimentological appmach[J].Water Research,1980,14(8):975-1001.
[15]栗献锋.太原市污灌区土壤重金属分布特征及风险评价[J].山西农业科学,2012,40(7):742-746,774.