Selective Chelating Resin for Copper Removal and Recovery in Aqueous Acidic Solution Generated from Synthetic Copper-Citrate Complexes from Bioleaching of E-waste

Table 4

Desorption capacity of copper (II) ions onto three chelating resins with various eluent concentrations.

Eluent	: H+-form(mg desorbed/g resin)			: Na+-form (mg desorbed/g resin)
	Chelex 100	Dowex m4195	Lewatit TP260	Chelex 100	Dowex m4195	Lewatit TP260
HCl 0.5 M	2.41	0.19	0.32	7.16	0.15	0.91
HCl 1 M	11.55	0.32	0.73	11.35	1.30	12.06
HCl 2 M	11.56	0.24	7.55	12.45	1.66	16.90
H2SO4 0.5 M	0.22	3.33	7.63	2.87	1.38	7.19
H2SO4 1 M	9.76	7.29	7.69	1.55	3.38	13.26
H2SO4 2 M	10.50	31.25	1.41	11.30	10.39	15.26
NH4OH 0.5 M	0.02	4.42	0.02	0.03	1.46	0.03
NH4OH 1 M	0.03	8.79	0.03	0.04	6.12	0.03
NH4OH 2 M	0.03	38.57	0.03	0.04	9.71	0.03