title: Utilization of cross-linked chitosan/bentonite composite in the removal of methyl orange from aqueous solution.
abstract: 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.
authors: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China E-mail: hrh20022002@163.com.
authors: Ruihua
authors: R
authors: Huang
authors: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China E-mail: hrh20022002@163.com.
authors: Qian
authors: Q
authors: Liu
authors: College of Science, Northwest A&F University, Yangling, Shaanxi 712100, China E-mail: hrh20022002@163.com.
authors: Lujie
authors: L
authors: Zhang
authors: Xi'an Institute of Geology and Mineral Resource, Xi'an, Shaanxi 710054, China.
authors: Bingchao
authors: B
authors: Yang
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry* / Q000302:isolation & purification; D001546:Bentonite / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000295:instrumentation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D001391:Azo Compounds; D011108:Polymers; D014874:Water Pollutants, Chemical; D001546:Bentonite; C100258:methyl orange; D048271:Chitosan