Table 4.

Biosorptive performance of different types of sorbents in zinc ions’ removal.

Sorbent	qmax, mg/g	Concentrations Range, mg/L	pH	Reference
Mineral-organic sorbent	3.4–6.5	10–100	6.0	Present study
Activated carbon	103.8	0.005–0.025 mol/L	5.2	[6]
Yeast Saccharomyces cerevisiae	9–17	10–100	3.0–6.0	[19]
Escherichia coli biofilm supported on kaolin	78	10–200	5.0	[7]
Staphylococcus epidermidis supported on kaolin	49	10–200	5.0	[7]
Turkish leonardite-clinoptilolite mixture	454.5	20–400	6.0	[21]
Algerian bentonite	1.74	1–60	8.0	[28]
Zeolite	4.3	50	4.0	[15]