Experimental Investigations on Adsorption of Reactive Toxic Dyes Using Hedyotis umbellate Activated Carbon

Table 6

Comparison of adsorption capacity of HUAC with other adsorbents.

Adsorbent	pH	Concentration (mg/L)	Maximum adsorption capacity (mg/g)	Dye	References
Rambutan seed	8.0	100	73.43	BG4	Ahmad et al. [4]
Spent tea leaves	4.0	100	123.5	BG4	Akar et al. [5]
Carob	4.0	100	73.54	BG4	Saygili et al. [6]
Pomelo peels	8.0	100	178.43	BG4	Bello et al. [8]
Hedyotis umbellate	10.0	50	102.38	BG4	This work
LTA-type zeolite (fly ash)	5.4	50	40.64	AF	Xu et al. [21]
Zeolite 5A	2.0	250	93.68	AF	Ahmedzeki et al. [33]
Laccase modified zeolite	5.0	50	31	AF	Kalkan et al. [34]
Malted sorghum mash	4.0	50	58.48	AF	Oyelude et al. [11]
Hedyotis umbellate	4.0	100	133.03	AF	This work