Preparation of sulfonated chitosan for enhanced adsorption of methylene blue from aqueous solution

被引:78
作者
Sabar, S. [1 ,2 ,3 ]
Aziz, H. Abdul [2 ]
Yusof, N. H. [1 ]
Subramaniam, S. [1 ]
Foo, K. Y. [4 ]
Wilson, L. D. [5 ]
Lee, H. K. [3 ,6 ,7 ]
机构
[1] Univ Sains Malaysia, SDE, Chem Sci Programme, Minden 11800, Penang, Malaysia
[2] Univ Sains Malaysia, Sch Chem Sci, Minden 11800, Penang, Malaysia
[3] Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore
[4] Univ Sains Malaysia, River Engn & Urban Drainage Res Ctr REDAC, Engn Campus, Nibong Tebal 14300, Penang, Malaysia
[5] Univ Saskatchewan, Dept Chem, 110 Sci Pl, Saskatoon, SK S7N 5C9, Canada
[6] Natl Univ Singapore, Environm Res Inst, T-Lab Bldg 02-01,5A Engn Dr 1, Singapore 117411, Singapore
[7] Natl Univ Singapore, Trop Marine Sci Inst, S2S Bldg,18 Kent Ridge Rd, Singapore 119227, Singapore
关键词
Adsorption; Chitosan; Dye removal; Hydrothermal synthesis; Sulfonation; HIGHLY EFFICIENT REMOVAL; HYDROGEL BEADS; ADSORBENT; DYE; COMPOSITE; INHIBITION; ACTIVATION; SORPTION; SURFACE; WATER;
D O I
10.1016/j.reactfunctpolym.2020.104584
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
In this research, sulfonated chitosan (S-CS) was prepared by hydrothermal grafting reaction using 4-formyl-1,3-benzene disulfonate and glutaraldehyde as a cross-linker reagent. Batch adsorption experiments were performed to demonstrate the adsorptive properties of S-CS with a cationic dye (methylene blue; MB) as a model organic pollutant. The effect of the solution pH (3 -12), initial dye concentration (50-200 mg L-1), contact time (0-24 h) and temperature (30-50 degrees C) on the relative removal of MB were studied. The kinetics of adsorption for MB showed a good correlation with the pseudo-second order kinetic model, while the adsorption isotherm at equilibrium was conformed to the Temkin model (R-2 > 0.99). The maximum adsorption capacity, q(m) was 351.7, 326.1 and 302.4 mg g(-1) at 303, 313 and 323 K, respectively. Owing to the simpler preparation method, relatively high adsorption capacity and regeneration ability, S-CS represents a promising adsorbent for the controlled MB removal and for other related organic dye pollutants from aqueous solution.
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页数:10
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