Physicochemical Characterization of Mining Waste from the Betare-Oya Gold Area (East Cameroon) and an Adsorption Test by Sabga Smectite (North-West Cameroon)

Table 10

Results of the adsorption test by smectic clay: adsorbent mass: 1 g.

Heavy metals	Initial concentration (mg·L^−1)	Residual concentration (mg·L^−1)	Adsorption capacity (mg·g^−1)	% Adsorption
Cu	0.01	0.002	0.4	80
Zn	0.2	0.033	8.35	83.5
Mn	0.04	0.022	0.9	45
Fe	3.90	9.38	—	−140.51
Pb	0.011	0	0.55	100