title: Schiff base - Chitosan grafted L-monoguluronic acid as a novel solid-phase adsorbent for removal of congo red.
abstract: A novel modified chitosan adsorbent (GL-SBCS) was synthesized by covalently grafting a Schiff base-chitosan (SBCS) onto the surface of l-monoguluronic acid. Physico-chemical investigation on the adsorption of congo red, an anionic azo dye by GL-SBCS has been carried out. The effect of different weight contents of chitosan in GL-SBCS composite, adsorbent dosage, initial pH and contract time were studied in detail using batch adsorption. Results showed that GL-SBCS exhibited better than normal CS and l-monoguluronic acid. Further investigation demonstrated that the adsorption pattern fitted well with the Langmuir model (R(2)>0.99) but less-satisfied the Freundlich model. Both ionic interaction as well as physical forces is responsible for binding of congo red with GL-SBCS as determined by zeta potential measurement Both sodium chloride and sodium dodecyl sulfate significantly influenced the adsorption process. SBCS would be a good method and resource to increase absorption efficiency for the removal of anionic dyes in a wastewater treatment process.
authors.affiliation: The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China.
authors.forename: Bo
authors.initials: B
authors.lastname: Yuan
authors.affiliation: School of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng, Jiangsu 224002, PR China.
authors.forename: Li-Gan
authors.initials: LG
authors.lastname: Qiu
authors.affiliation: Jiangsu Xinnuotaike New Material Science and Technology Ltd, XinYi, Jiangsu 221400, PR China.
authors.forename: Hong-Zhen
authors.initials: HZ
authors.lastname: Su
authors.affiliation: The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China.
authors.forename: Cheng-Liang
authors.initials: CL
authors.lastname: Cao
authors.affiliation: The Key Laboratory of Biotechnology for Medicinal Plants of Jiangsu Province, Jiangsu Normal University, Xuzhou, Jiangsu 221116, PR China. Electronic address: jhjiang@jsnu.edu.cn.
authors.forename: Ji-Hong
authors.initials: JH
authors.lastname: Jiang
mesh_terms: D000327:Adsorption; D000838:Anions; D048271:Chitosan / Q000737:chemistry*; D003224:Congo Red / Q000737:chemistry*; D006603:Hexuronic Acids / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D012545:Schiff Bases / Q000737:chemistry*; D013696:Temperature
chemical_list: D000838:Anions; D006603:Hexuronic Acids; D012545:Schiff Bases; C007896:guluronic acid; D003224:Congo Red; D048271:Chitosan
keywords: Congo red; Schiff base chitosan; l-Monoguluronic acid