Table 4.

Dye adsorption capacities of the resulting activated carbons as reported in the literature.

Adsorbent	Adsorbate	Qmax (mg g−1)	Reference
Methylene blue	Date stones	381.79	Ahmed and Theydan40
Methylene blue	Oil palm fibers	382.32	Foo and Hameed41
Methylene blue	Coconut husks	418.15	Foo and Hameed42
Methylene blue	Durian shells	410.85	Foo and Hameed43
Methylene blue	Date pits	244.00	Ashour81
Methylene blue	Date pits	345.00	Reddy et al.82
Methylene blue	Date stones	316.11	Foo and Hameed83
Methylene blue	Date palm seeds	612.10	Islam et al.84
Methylene blue	Date pits	455.00	Mahmoudi et al.85
Methylene blue	Date palm rachis	198.80	Daoud et al.86
Methylene blue	Microalgal biomass	113.00	Yu et al.87
Methylene blue	Coconut shell	156.25	Yağmur et al.88
Methylene blue	N. diderrichii	35.09	Omorogie et al.89
Methylene blue	Banana roots	165.00	Paluri et al.90
Methylene blue	Ackee apple pods	47.17	Bello et al.91
Methylene blue	Soya wastes	90.00	Batool and Valiyaveettil92
Methylene blue	Corncob wastes	636.94	Zhou et al.93
Congo red	Watermelon rind	17.00	Masoudian et al.2
Congo red	Bael shells	98.03	Ahmad and Kumar63
Congo red	Grape wastes	455.00	Sayğılı and Güzel64
Congo red	Microalgal biomass	164.35	Yu et al.87
Congo red	Speargrass leaves	313.00	Bello and Banjo94
Congo red	Date pits	105.00	Belhachemi and Addoun95
Congo red	Peanut shells	150.00	Lawal et al.96
Congo red	Coffee wastes	90.90	Lafi et al.97
Congo red	Wood wastes	8.00	Stjepanovic et al.98
Congo red	Rubber seed shells	458.43	Present study
Methylene blue	Rubber seed shells	659.35	Present study
Congo red	Rubber seeds	227.27	Present study
Methylene blue	Rubber seeds	769.23	Present study