Use of Moringa oleifera (Moringa) Seed Pods and Sclerocarya birrea (Morula) Nut Shells for Removal of Heavy Metals from Wastewater and Borehole Water

Table 2

Concentration (mgL⁻¹) of selected metals in water samples.

Average concentration (mgL^−1) of selected metals in water samples and ± standard deviations.
	Fe	Zn	Cu	Cd	Pb	Mn	Mg
Inlet	1.361 ± 0.020	0.251 ± 0.010	0.086 ± 0.005	0.013 ± 0.001	0.285 ± 0.021	0.309 ± 0.001	12.867 ± 0.009
Primary	1.074 ± 0.023	0.206 ± 0.012	0.078 ± 0.001	0.013 ± 0.001	0.245 ± 0.007	0.304 ± 0.001	11.596 ± 0.003
Secondary	0.288 ± 0.046	0.142 ± 0.063	0.029 ± 0.002	0.015 ± 0.001	0.230 ± 0.042	0.222 ± 0.001	13.487 ± 0.002
Aeration	2.432 ± 0.045	0.405 ± 0.087	0.127 ± 0.012	0.016 ± 0.001	0.390 ± 0.003	0.380 ± 0.001	13.478 ± 0.001
Effluent	0.255 ± 0.028	0.116 ± 0.018	0.028 ± 0.002	0.015 ± 0.001	0.265 ± 0.021	0.211 ± 0.005	13.671 ± 0.003
Borehole	0.334 ± 0.004	0.011 ± 0.002	0.012 ± 0.001	0.002 ± 0.001	0.113 ± 0.008	0.002 ± 0.000	1.288 ± 0.032