Heavy Metal Contamination in Soil and Brown Rice and Human Health Risk Assessment near Three Mining Areas in Central China

Table 2

Concentrations (mean ± standard deviation, mg/kg) of Cd, As, Sb, Pb, and Mn in soil near three mine areas in Hunan Province.

		Cd	As	Sb	Pb	Mn
LY; ()	Mean ± SD	0.050 ± 0.001	26.495 ± 3 .2326	16.362 ± 1.458	30.337 ± 0.845	332.604 ± 3.662
	Range	0.006–0.107	17.690–34.102	10.110–22.300	17.345–41.450	241.030–401.260
HY; ()	Mean ± SD	0.865 ± 0.052	142.714 ± 2.210	20.393 ± 1.577	356.161 ± 1.905	420.316 ± 8.631
	Range	0.345–1.451	26.870–562.340	9.620–36.400	124.360–756.200	215.630–666.310
LSJ; ()	Mean ± SD	0.049 ± 0.001	32.628 ± 1.242	65.737 ± 5.340	13.732 ± 1.616	229.395 ± 7.921
	Range	0.010–0.130	12.540–70.230	37.100–111.240	0.555–33.405	102.650–412.860
Total	Mean ± SD	0.472 ± 0.194	89.029 ± 1.461	36.739 ± 7.223	193.133 ± 3.855	339.996 ± 15.924
	Range	0.006–1.451	12.540–562.340	9.620–111.240	0.555–756.200	102.650–666.310
Background value^a		0.098	14		27	459
MAC^b		0.3	25	36^d	300	NV^c

Note. ^aSoil background value in Hunan Province and study methods (Pan et al., 1998). ^bMaximum allowable concentration of heavy metals in soil, recommended by the Chinese Environmental Quality Standard for Soil, grade II (GB 15618-1995). ^cNo criterion value set [34]. ^dRecommended in soils by the WHO (Chang et al., 2002).