Equilibrium, Kinetic, and Thermodynamic Studies on the Adsorption of Cadmium from Aqueous Solution by Modified Biomass Ash

Table 3

Comparison of Cd²⁺ adsorption capacities of different absorbents.

Absorbent	Adsorption capacity (mg/g)	pH	Reference
Synthesized matrix	25.00	5
Peanut shell	0.93	5	[22]
Banana peel	5.71	5	[43]
Biochar	28.1	5	[44]
Coal fly ash	11.43	5	[45]
Bentonite	13.5	5.5	[46]
Sepiolite	8.11	5	[47]
Zeolite	6.72	6.5	[48]
Activated carbon	20.36	6	[49]