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7 底泥重金属单因子污染指数等级分布情况

Table 7 Class distribution of Pi of heavy metals in the sediments

元素 Pi 比例/% 变化范围 平均值 Pi≤1 1<Pi≤2 2<Pi≤3 Pi>3 As 0.36~2.64 1.02 68.18 22.73 9.09 0 Cd 0.33~6.15 1.41 50.00 36.36 4.55 9.09 Cr 0.82~1.30 1.11 18.18 81.82 0 0 Cu 0.30~1.71 0.84 81.82 18.18 0 0 Hg 0.14~2.57 0.63 81.82 13.63 4.55 0 Ni 0.53~1.69 1.17 31.82 68.18 0 0 Pb 0.33~25.72 2.95 72.72 4.55 4.55 18.18 Zn 0.36~5.14 1.24 45.45 40.91 9.09 4.55