安徽省泗县池塘底泥As含量分布特征及污染评价
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摘要
利用X射线荧光光谱法测定了安徽泗县池塘底泥中As的含量,探讨其分布特征及来源并进行生态风险评价。结果表明:研究区池塘底泥As含量的变化范围在8—26mg/kg,平均值为13.32mg/kg;空间分布为:新集>黄圩>杨集>武圩>大庄>中心区;工业废弃物的排放以及含As养殖饲料的使用对底泥As富集的贡献显著;As的地累积指数(Igeo)范围在-0.66—1.05,为无污染到中度污染。长远来看,As累积趋势的存在,对土壤质量和农业安全生产具有一定的隐患。
Concentrations,distribution characteristics,source and ecological risk assessment of As element in ponds sediment from Sixian county in Anhui were determined,analysed and evaluated by X-Ray fluorescence spectrometry.The results indicated that the range of As concentrations were between 8mg/kg and 26mg/kg in researched area,and the mean value was 13.32mg/kg.The space distribution of As concentrations from high to low was Xinji,Huangwei,Yangji,Wuwei,Dazhuang,and the middle area.Contamination of industry and the use of breeding fodder contributed to the enrichment of As in ponds sediment.The Igeo index of As was in the range of-0.66—1.05,which represented pollution-free to moderate pollution.There was the tendency existence of As accumulation in the long run,that had the certain hidden danger in soil quality and agricultural production safety.
Concentrations,distribution characteristics,source and ecological risk assessment of As element in ponds sediment from Sixian county in Anhui were determined,analysed and evaluated by X-Ray fluorescence spectrometry.The results indicated that the range of As concentrations were between 8mg/kg and 26mg/kg in researched area,and the mean value was 13.32mg/kg.The space distribution of As concentrations from high to low was Xinji,Huangwei,Yangji,Wuwei,Dazhuang,and the middle area.Contamination of industry and the use of breeding fodder contributed to the enrichment of As in ponds sediment.The Igeo index of As was in the range of-0.66—1.05,which represented pollution-free to moderate pollution.There was the tendency existence of As accumulation in the long run,that had the certain hidden danger in soil quality and agricultural production safety.
引文
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[3]Meharg A A.Arsenic in Rice-Understanding a New Disaster for South-East Asia[J].Trends in Plant Science,2004,9(9):415—417.
[4]Mandal B K,Suzuki K T.Arsenic Round the World:a Review[J].Talanta,2002,58(1):201—235.
[5]Rossman T G.Mechanism of Arsenic Carcinogenesis:an Integrated Approach[J].Mutation Research Fundamental and MolecularMechanisms of Mutagenesis,2003,533(1—2):37—65.
[6]Roychowdhury T,Tokunaga H,Ando M.Survey of Arsenic and Other Heavy Metals in Food Composites and Drinking Water andEstimation of Dietary Intake by the Villagers from an Arsenic-Affected Area of West Bengal,India[J].The Science of The TotalEnvironment,2003,308(1—3):15—35.
[7]李经伟,杨路华,夏辉等.白洋淀底泥重金属污染地积累指数法评价[J].人民黄河,2007,29(12):59—88.
[8]陈松,黄淑玲,孙林华等.安徽宿州市沱河底泥中重金属元素地球化学特征[J].地球与环境,2011,39(3):331—337.
[9]中国环境监测总站.中国土壤元素背景值[M].北京:中国环境科学出版社,1990.330—382.
[10]师荣光,周启星,刘凤枝等.天津郊区土壤-蔬菜系统中Cd的积累特征及污染风险[J].中国环境科学,2008,28(7):634—639.
[11]Lin Y P,Teng T P,Chang T K.Multivariate Analysis of Soilheavy Metal Pollution and Landscape Pattern in Changhua CountyinTaiwan[J].Landscape and Urban Planning,2002,62(1):19—35.
[12]Environmental Protection Agency of United States.Integrated Risk Information System:Arsenic,Inorganic,CASRN 7440—38-2[R].Washington DC:Government Printing Office,1998.
[13]徐红宁,许嘉琳.我国砷异常区的成因及分布[J].土壤,1996,(2):80—84.
[14]赵伦山,武胜,周继华等.大同盆地砷、氟中毒地方病生态地球化学研究[J].地学前缘,2007,14(2):225—235.
[15]伯英,罗立强.内蒙古巴彦淖尔地区环境中砷的分布特征[J].环境与健康杂志,2010,27(8):696—699.
[16]Muller G.Index of Geoaccumulation in Sediments of the Rhine River[J].Geological Journal,1969,2:109—118.
[17]张玉玺,孙继朝,向小平等.云南阳宗海湖底沉积物重金属分布与来源[J].环境科学与技术,2010,33(12):171—175.
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