Biogeochemical behavior, health risk assessment and source identification of antimony and arsenic in soil from a legacy antimony smelter in Gansu, Northwest China

Environmental Sciences Europe

Table 1 Statistical analysis and pollution evaluation of HMs concentrations in soils/mg·kg⁻¹

Element	Sb	As	Cr	Co	Ni	Cu	Zn	Se	Mo	Ag	Cd	Ba	Pb
Minimum	148	15.7	40.6	9.64	25.0	22.5	63.5	3.64	0.27	0.12	0.09	201	24.9
Median	1.62 × 10³	53.8	49.1	13.6	40.0	38.2	369	10.9	1.20	0.80	1.91	245	169
Maximum	1.85 × 10⁵	3.69 × 10³	95.5	45.0	162	523	1.68 × 10⁴	1.70 × 10³	14.0	19.1	44.8	723	5.50 × 10³
Mean	1.66 × 10⁴	319	53.0	19.6	61.3	85.5	1.78 × 10³	138	3.52	3.66	4.71	323	692
SD	4.29 × 10⁴	833	14.7	11.9	40.5	115	3.79 × 10³	393	4.20	5.38	9.82	162	1.33 × 10³
CV	258%	261%	27.8%	60.7%	66.1%	134%	213%	285%	119%	147%	208%	50.0%	192%
Risk screening values^a	180	60	2000	70	900	18,000	2000	800	700	/	65	2000	800
Soil background values^b	1.26	12.6	70.2	12.6	35.2	24.1	68.5	/	0.8	0.132	0.116	446	18.8

a Risk screening values are the soil quality standard values for soil contamination of industrial land in China’s soil environmental quality standard [4, 26]
b Soil background values are soil element background values in Gansu province [5]