Chromium Laden Soil, Water, and Vegetables nearby Tanning Industries: Speciation and Spatial Distribution

Table 2

Concentration and species of chromium in soil between the wastewater treatment plant of Colba tannery and the receiving river (CS=Colba tannery soil sample) [mean ± SD mg kg⁻¹, n = 3].

Soil sample	Cr (III)	Water-soluble Cr (VI)	Cr (VI)	Total Cr (UV/vis)	Total Cr (ICP-OES)
CS1	1811.4 ± 0.21	0.183 ± 0.02	0.621 ± 0.02	1812.21 ± 2.21	1809.33 ± 0.31
CS2	1525.7 ± 0.32	0.221 ± 0.01	0.783 ± 0.01	1526.48 ± 3.32	1525.71 ± 1.42
CS3	1193.6 ± 0.41	0.331 ± 0.32	0.915 ± 0.32	1194.51 ± 3.32	1196.02 ± 0.67
CS4	791.5 ± 0.17	0.362 ± 0.04	0.973 ± 0.04	792.47 ± 1.04	792.33 ± 0.44
Control	0.18 ± 0.03	ND	ND	0.18 ± 0.03	0.07 ± 0.01

ND: not detected.