金沙江流域底泥重金属污染特征及来源解析——以蜻蛉河为例

程琰勋, 徐磊, 吴亮, 赵萌生, 王福华, 钱坤, 郑洪福, 李文辉, 张宏辉

Characteristics and source analysis of heavy metal contamination in the sediments of the Jinsha River Basin: A case study of the Qingling River

CHENG Yan-Xun, XU Lei, WU Liang, ZHAO Meng-Sheng, WANG Fu-Hua, QIAN Kun, ZHENG Hong-Fu, LI Wen-Hui, ZHANG Hong-Hui

表6 底泥重金属地累积指数等级分布情况

Table 6 Class distribution of Igeo for heavy metals in the sediments

元素 Igeo 比例/% 变化范围 平均值 Igeo<0 0<Igeo<1 1<Igeo<2 2<Igeo<3 3<Igeo<4 4<Igeo<5 As -2.07~0.82 -0.76 81.82 18.18 0 0 0 0 Cd -2.20~2.04 -0.50 77.27 13.63 4.55 4.55 0 0 Cr -0.88~-0.21 -0.44 100.00 0 0 0 0 0 Cu -2.33~0.19 -0.95 90.91 9.09 0 0 0 0 Hg -3.39~0.78 -1.68 90.91 9.09 0 0 0 0 Ni -1.51~0.17 -0.42 90.91 9.09 0 0 0 0 Pb -2.17~4.10 -0.56 72.72 9.09 9.09 0 4.55 4.55 Zn -2.06~1.78 -0.57 81.82 13.63 4.55 0 0 0