Dust Deposition and Associated Heavy Metal Contamination in the Neighborhood of a Cement Production Plant at Konongo, Ghana

Table 4

Concentrations of heavy metals in soil samples.

Site ID	Concentration of heavy metals (mg/kg)
	Cd	Cr	Cu	Zn	Pb
NA	1.03 ± 0.09	5.02 ± 0.25	8.84 ± 2.63	12.3 ± 4.37	17.6 ± 2.53
EA	1.06 ± 0.06	3.87 ± 1.67	10.3 ± 1.55	8.95 ± 1.10	17.6 ± 0.45
SA	1.07 ± 0.16	4.90 ± 0.89	12.0 ± 0.37	12.9 ± 3.32	25.2 ± 1.80
WA	0.99 ± 0.11	5.35 ± 1.03	4.80 ± 3.62	3.06 ± 2.17	13.1 ± 9.16
Mean	1.04	4.78	8.95	9.30	18.4
WHO/FAO (2007)	0.8	100	100	300	50

NA = north axis; EA = east axis; SA = south axis; WA =west axis.