白银东大沟水体和底泥中重金属污染评价

张钊熔, 段星星, 夏明哲

Contamination situation and evaluation of heavy metal pollution in water and sediments of Dongdagou area, Baiyin

Zhao-Rong ZHANG, Xing-Xing DUAN, Ming-Zhe XIA

表5 底泥中重金属含量统计特征

Table 5 Statistical characteristics of the heavy mental contents in the sediments

元素 最小值/10-6 最大值/10-6 平均值/10-6 标准差 变异系数 甘肃省土壤背景值[25]/10-6 Cr 43 80.1 61.6 10.6 0.2 70.2 Zn 425.3 13800 5999.3 4417.7 0.7 68.5 Pb 60.6 15900 4819.5 5387.4 1.1 18.8 Cu 39.4 8449.8 1795.6 2282.6 1.3 24.1 Cd 2.689 2908 502.816 832.31 1.7 0.116 Hg 0.03 476.6 65.07 129.15 2 0.02