多种评价方法应用于天津核桃主产区的土壤环境质量评价

谢薇, 杨耀栋, 侯佳渝, 菅桂芹, 李国成, 赵新华

The evaluation of soil environmental quality of main walnut producing areas based on various methods of heavy metal contamination assessment in Tianjin

XIE Wei, YANG Yao-Dong, HOU Jia-Yu, JIAN Gui-Qin, LI Guo-Cheng, ZHAO Xin-Hua

表8 核桃中重金属元素含量统计

Table 8 Statistics of heavy metal contents in walnuts

元素 最小值/10-6 最大值/10-6 平均值/10-6 中位数/10-6 标准差 变异系数/% 限量标准/10-6 Cd 0.001 0.020 0.003 0.002 0.004 129.2 0.5 Hg 0.001 0.007 0.004 0.003 0.002 52.9 0.02 Pb 0.021 0.114 0.044 0.040 0.022 49.7 0.2 As 0.027 0.142 0.043 0.037 0.026 60.4 0.5 Cr 0.613 0.981 0.760 0.744 0.105 13.8 1.0 Zn 16.43 33.94 25.48 27.58 6.27 24.6 — Cu 8.90 18.88 14.68 14.69 2.87 19.6 —