作　　者： ; ; ; ; ; ; ;

机构地区： 中国科学院广州地球化学研究所

出　　处： 《地球化学》 2012年第1期63-69,共7页

摘　　要： 分析了湘江岳阳段表层沉积物样品中10种典型重金属元素(Cd、Cu、Pb、Zn、Cr、Tl、V、Mn、Co和Ni)的含量水平和分布规律,并采用地累积指数法和潜在生态风险指数法,初步评价了沉积物中重金属污染状况和潜在生态风险。研究结果表明:(1)湘江岳阳段沉积物中重金属Cd、Zn、Mn和Cu等污染较为严重,其含量范围分别为8.56～19.4 mg/kg、250～367 mg/kg、1489～2258 mg/kg和40.5～64.7 mg/kg;(2)研究区域中多种重金属潜在生态风险指数(RI)为369～698,表明研究区域沉积物重金属污染导致的潜在生态风险高,且主要风险污染物为Cd和Tl;(3)湘江岳阳段沉积物呈现出以Cd为主的多种重金属复合污染特征。 The occurrence and distribution of 10 heavy metals, Cd, Cu, Pb, Zn, Cr, Tl, V, Mn, Co and Ni in sediments collected from Xiangjiang River （Yueyang section） were analyzed. Meanwhile the potential ecological risks of these heavy metals were calculated and assessed using Index of geoaccumulation （Igco） as well as Lars Hanson method based on concentrations measured in this study. The results indicated that （1） Xiangjiang River （Yueyang section） was heavily polluted by Cd, Zn, Mn and Cu, with concentrations ranging from 8.56 19.4 mg/kg, 250 367 mg/kg, 1489 2258 mg/kg and 40.5 64.7 mg/kg, respectively; （2） RI values in this area varied from 369 to 698, implying high ecological risks in most of the sampling sites in the studied area, which were mainly from Cd and T1; （3） The pollution characteristic of multi-metals in this section was mainly related to Cd.

关 键 词： 重金属 沉积物 湘江岳阳段 地累积指数 潜在生态风险指数法

领　　域： [天文地球] [天文地球] [天文地球] [天文地球]