A kind of biocomposite was prepared by the intercalation of chitosan in bentonite and the cross-linking reaction of chitosan with glutaraldehyde, which was referred to as cross-linked chitosan/bentonite (CCS/BT) composite. Adsorptive removal of methyl orange (MO) from aqueous solutions was investigated by batch method. The adsorption of MO onto CCS/BT composite was affected by the ratio of chitosan to BT and contact time. pH value had only a minor impact on MO adsorption in a wide pH range. Adsorption kinetics was mainly controlled by the pseudo-second-order kinetic model. The adsorption of MO onto CCS/BT composite followed the Langmuir isotherm model, and the maximum adsorption capacity of CCS/BT composite calculated by the Langmuir model was 224.8 mg/g. Experimental results indicated that this adsorbent had a potential for the removal of MO from aqueous solutions.
Utilization of cross-linked chitosan/bentonite composite in the removal of methyl orange from aqueous solution
Ruihua Huang, Qian Liu, Lujie Zhang, Bingchao Yang; Utilization of cross-linked chitosan/bentonite composite in the removal of methyl orange from aqueous solution. Water Sci Technol 1 January 2015; 71 (2): 174–182. doi: https://doi.org/10.2166/wst.2014.478
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