张掖盆地1990s表土层深部土壤重金属分布特征及其来源分析

何甘地, 何进忠, 牛洪斌, 张忠平

Distribution and origin of heavy metals in deep topsoil of the Zhangye Basin in the 1990s

HE Gan-Di, HE Jin-Zhong, NIU Hong-Bing, ZHANG Zhong-Ping

表4 H3平均潜在生态风险指数

(\overset{ˉ}{R I})

异常统计值

Table 4 Statistics of the H3 anomaly of average potential ecological risk indexes

(\overset{ˉ}{R I})

参数	Zn	Pb	Ni	Hg	Cu	Cr	Cd	As	$\overset{ˉ}{R I}$
样品数	6	6	6	6	6	6	6	6	6
平均值	69.75	20.87	58.20	109.50	32.15	131.12	148.33	3.22	45.80
标准差	2.36	1.38	4.43	10.08	2.57	5.60	9.83	0.97	2.93
最小值	65.70	20.10	49.80	103.00	27.60	119.70	130.00	1.50	43.91
最大值	71.20	23.50	60.70	123.00	33.70	133.80	160.00	3.80	49.89
偏度	-0.75	1.06	-1.02	0.54	-0.82	-1.36	-0.80	-0.83	0.55
峰度	1.59	2.30	2.23	1.05	1.75	2.91	2.35	1.76	1.07