. 2021 Nov 11;11(58):36528–36553. doi: 10.1039/d1ra06892j

Maximum sorption capacities of various industrial waste adsorbents used for the removal of several contaminants.

Waste precursor	Contaminant	Adsorption capacity (mg g⁻¹)	Ref.
Red mud	Reactive black 5	35.58	159
	Acid blue 113	83.33	159
	Phosphate	0.58	160
	Cu²⁺	5.35	161
Coal fly ash	Cd²⁺	18.98	162
	Cu²⁺	20.92	162
	Cu²⁺	48.80	163