表6 表层沉积物重金属的单因子污染指数和单因子潜在生态风险指数统计结果Table 6 Single factor pollution index and potential ecological risk index of heavy metals in surface sediments 参数 Cu Ni Cr As Cd Pb Hg Zn C f i (平均值) 0.43～1.19(0.86) 0.37～2.28(1.49) 0.65～2.25(1.76) 0.99～1.84(1.57) 0.68～5.20(2.26) 0.64～1.09(0.79) 0.02～0.60(0.26) 0.47～1.40(0.98) E r i (平均值) 2.16～5.97(4.3) 1.86～1 ........
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