松嫩平原湖泊底泥重金属空间变异特征及其风险评价

于万辉, 王俊杰, 臧淑英

The Spatial Variability Characteristics and Potential Ecological Risk Assessment of Heavy Metals of Lake Sediments in the Songnen Plain

Wan-hui YU, Jun-jie WANG, Shu-ying ZANG

表3 松嫩平原湖泊底泥重金属的描述性统计分析(mg/kg)

Table 3 Descriptive statistics of heavy metals in sediments of lakes in the Songnen Plain

属性 样本数 最大值 最小值 标准差 平均值 背景值 变异系数(%) Cu 31 106 8 17.79 29.09 17.78 61.16 Ni 31 52 16 10.31 35.07 23.65 29.4 Mn 31 468 30.4 115.93 306.83 484.96 37.78 Pb 31 54 7 11.22 25.57 20.23 43.88 Sr 31 257 32 45.11 134.97 113.76 33.42 Zn 31 320 65 57.33 189.79 52.02 30.21