北京东南郊土壤重金属元素分布及其在表层土壤中的富集特征
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张沁瑞, 李欢, 邓宇飞, 黄勇, 张博, 许一波
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Distribution of heavy metal elements in soil of the Southeastern suburbs of Beijing and their enrichment characteristics in surface soil
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ZHANG Qin-Rui, LI Huan, DENG Yu-Fei, HUANG Yong, ZHANG Bo, XU Yi-bo
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表2 表层土壤、深层土壤重金属元素统计特征值
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Table 2 Statistical eigenvalues of heavy metal elements in surface soil and deep layers soil
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| 项目 | As | Cd | Cr | Cu | Hg | Ni | Pb | Zn | | 表层 | X/10-6 | 8.64 | 0.171 | 55.1 | 24.9 | 0.079 | 27.3 | 25.5 | 76.1 | | Xmin/10-6 | 3.89 | 0.070 | 37.6 | 12.6 | 0.011 | 17.8 | 17.7 | 37.3 | | Xmed/10-6 | 8.61 | 0.165 | 55.0 | 24.3 | 0.059 | 26.8 | 24.9 | 73.4 | | Xmax/10-6 | 20.7 | 0.611 | 81.8 | 122 | 1.54 | 46.3 | 70.4 | 288 | | S/10-6 | 2.20 | 0.058 | 6.20 | 9.30 | 0.126 | 4.40 | 5.50 | 23.1 | | Cv/% | 25.5 | 33.4 | 11.2 | 36.4 | 134 | 16.0 | 21.4 | 30.3 | | 深层 | X/10-6 | 8.76 | 0.108 | 53.8 | 21.0 | 0.026 | 26.8 | 20.4 | 59.4 | | Xmin/10-6 | 1.82 | 0.040 | 15.9 | 4.50 | 0.005 | 8.30 | 13.4 | 20.2 | | Xmed/10-6 | 8.52 | 0.104 | 52.9 | 20.6 | 0.015 | 26.2 | 20.0 | 57.8 | | Xmax/10-6 | 28.6 | 0.550 | 128 | 39.9 | 0.882 | 47.7 | 46.8 | 107 | | S/10-6 | 3.97 | 0.049 | 12.1 | 7.60 | 0.064 | 7.80 | 4.20 | 17.6 | | Cv/% | 45.4 | 44.6 | 22.4 | 36.1 | 244 | 29.0 | 20.7 | 29.6 | | 北京市表层土壤/1 | 9.30 | 0.147 | 66.0 | 23.0 | 0.045 | 27.0 | 25.0 | 67.0 | | 北京市深层土壤/1 | 9.70 | 0.096 | 67.0 | 23.0 | 0.023 | 29.0 | 23.0 | 64.0 | | 中国表层土壤/1 | 8.50 | 0.140 | 58.0 | 23.0 | 0.066 | 25.0 | 24.0 | 69.0 | | 中国深层土壤/1 | 8.40 | 0.095 | 58.0 | 20.0 | 0.017 | 26.0 | 20.0 | 62.0 |
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