Performance characteristics of some adsorbents used for the removal of 2,4-dichlorophenol.

Adsorbent type	Maximum adsorption capacity (mg g−1)	pH	Contact time, hour	Removal, (%)	Ref.
Biocomposites of polypyrrole (PPY), polyaniline (PANI) and sodium alginate (NaAlg) with cellulosic biomass barley husk (BH)	7.6–24.6	7–10	2	58	46
Bamboo biochar-calcium sulphate	16.4	6.5	3	60	47
Cyclodextrin-ionic liquid polymer as a macro porous material	29.6	6	3	83	48
Activated carbon-impregnated alginate β-cyclodextrin/gelatin beads	39.4	7	1	86	49
Carbon dots modified mesoporous organosilica	99.7	7	3	60	50
β-cyclodextrin polymer (β-CDP) and γ-cyclodextrin polymer (γ-CDP)	15.7	7	0.2	70	51
Punica granatum (pomegranate) peel	65.7	5.5–6.5	10	50	52
NiFe2O4/PAOT nanocomposites	162	6	2	83	This work