Journal of Genetic Engineering and Biotechnology

Table 6 Heavy metal concentration in water samples

From: Physiochemical analyses and molecular characterization of heavy metal-resistant bacteria from Ilesha gold mining sites in Nigeria

Samples	1	2	3A	3B	4A	4B	5A	5B	6A	6B	7A	7B	WHO	Mean
Cd (ppm)	0.019	0.045	0.012	0.010	0.006	0.072	0.038	0.050	0.035	0.020	0.014	0.015	0.003	0.028
Co (ppm)	0.012	0.036	0.009	0.006	0.018	0.029	0.021	0.036	0.011	0.010	0.006	0.004	0.008	0.016
Pb (ppm)	0.049	0.183	0.026	0.031	0.012	0.067	0.027	0.033	0.019	0.026	0.012	0.009	0.01	0.041
Zn (ppm)	0.172	0.275	0.158	0.137	0.119	0.209	0.187	0.214	0.187	0.192	0.137	0.155	–	0.178
Hg (ppm)	ND	ND	ND	ND	ND	ND	0.658	0.603	ND	ND	0.516	0.549	0.06	0.582

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