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

Table 9

Results of the adsorption test by smectic clay: adsorbent mass: 0.5 g.

Heavy metals	Initial concentration (mg·L^−1)	Residual concentration (mg·L^−1)	Adsorption capacity (mg·g^−1)	% Adsorption
Cu	0.01	0.004	0.6	60
Zn	0.2	0.022	17.8	89
Mn	0.04	0.018	2.2	55
Fe	3.90	7.40	—	−89.74
Pb	0.011	0	1.1	100