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Table 2

Adsorption capacities of various adsorbents for the removal of dyes

Adsorbents	Dye	Isotherm model	q(mg/g)	References
r GO-IO composites	MB	Langmuir	39	Sharif et al. (2017)
GHA gels	MB	Langmuir	55.9	Cui et al. (2015)
Graphene gel	MB	Langmuir	334.5	Lau et al. (2018)
Crosslinked cellulose dialdehyde	CR	Langmuir	42.03	Kumari et al. (2016)
Functionalised carbon nanotube/mixed	CR	Langmuir	1,250	Yang et al. (2015)
Brown macroalga	MB	Langmuir	95.45	Daneshvar et al. (2017)
Modified PS-SD	MB	Langmuir	881.62	This work
Modified PS-SD	CR	Langmuir	1,880.91	This work

Adsorbents	Dye	Isotherm model	q(mg/g)	References
r GO-IO composites	MB	Langmuir	39	Sharif et al. (2017)
GHA gels	MB	Langmuir	55.9	Cui et al. (2015)
Graphene gel	MB	Langmuir	334.5	Lau et al. (2018)
Crosslinked cellulose dialdehyde	CR	Langmuir	42.03	Kumari et al. (2016)
Functionalised carbon nanotube/mixed	CR	Langmuir	1,250	Yang et al. (2015)
Brown macroalga	MB	Langmuir	95.45	Daneshvar et al. (2017)
Modified PS-SD	MB	Langmuir	881.62	This work
Modified PS-SD	CR	Langmuir	1,880.91	This work