农业现代化研究Issue(5)：901-905,5.DOI:10.13872/j.1000-0275.2015.0081
东洞庭湖湿地土壤重金属污染特征及潜在生态风险评价
Characteristics and potential ecological risk of heavy metals in wetland soils around East Dongting Lake
摘要
Abstract
Soilsin three typicalbottom lands(X iaoxihu,Lium enzha and M atang)around EastD ongting w ere sam pled and the contents of heavy m etals in the soils w ere analyzed. T he characteristics of heavy m etal pollution and potential ecological risks w ere evaluated using the single factor pollution index m ethod, N em erow com posite index m ethod and Hakansonpotentialecologicalrisksindexmethod.Theresultsshowed that the contentsofCd,Cr,Ni,Pb,Hg,andAsin soils from the three bottom lands w ere 0.59-2.40 m g/kg, 114.52-119.94 m g/kg, 53.49-66.59 m g/kg, 42.88-83.46 m g/kg, 0.09-0.21 m g/kg and 11.65-24.04 m g/kg respectively. A nd the values of six indexes of heavy m etals in the M atang bottom lands w ere higher than those in the X iaoxihu and L ium enzha bottom lands. O f the six kinds of heavy m etals, C d pollution w as the m ostsevere one,as the contentofC d in M atang w as 7 tim es m ore than the background value,and 3.8 tim esand 4.1 tim esm ore than the contentsofX iaoxihu and Lium enzha respectively.The single factorpollution index of different heavy m etals w ere as follow s, C d > N i> H g > A s> Pb > C r, w hich also show ed that the heaviest polluted bottomlandswasinM atang,andtheninXiaoxihu,andthelightestpollutedbottomlandswasinLiumenzha.Thepotential ecologicalrisksindex ofheavy m etalsand pollution grading evaluation show ed thatthe soilsin Lium enzha and X iaoxihu w ere at low ecological risk, w hile the soils in M atang w as at m oderate ecological risk. T herefore, the heavy m etal pollution in the bottom lands around D ongting Lake,especially in the area w hich connected to X iangjiang R iver,should be attracted m ore and m ore attention and effective m easures should be take to handle the heavy m etal pollution in this district.关键词
重金属/生态危害/污染指数/潜在生态风险/东洞庭湖Key words
heavy m etal/ecological hazard/pollution index/potential ecological risk/E ast D ongting L ake分类
资源环境引用本文复制引用
刘娜,曾静,李旭,侯志勇,谢永宏..东洞庭湖湿地土壤重金属污染特征及潜在生态风险评价[J].农业现代化研究,2015,(5):901-905,5.基金项目
国家科技支撑计划项目（2014BAC09B03）；国家基础性工作调查专项（2013FY111800）。 （）
