title: Removal of cadmium from aqueous solution using low molecular weight chitosan derivative.
abstract: A 2(3) factorial design was used to examine the sorption of Cd(2+) onto cross-linked low molecular weight chitosan pyruvic acid derivative. Three factors and two levels of solution pH (A) (6.0 or 10.0), temperature (B) (45 or 70 °C) and Cd(II) concentration (C) (1 or 3 mg/L) were considered. Batch mode system was employed with 0.05 g of the sorbent and 25 mL of Cd(II) solution. The efficiency of cadmium removal during an exposition time of 4h was then evaluated. The factors and their interaction effect on the cadmium removal efficiency followed the order: Cd(II) concentration > solution pH > interaction between solution pH and Cd(II) concentration>interaction between solution pH, temperature and Cd(II) concentration. Langmuir isotherm model was the best isotherm model. The Pseudo second order fitted well the kinetic data. The thermodynamic studies revealed the nature of the cadmium sorption.
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; Department of Ecological Agriculture, Bolgatanga Polytechnic, Bolgatanga, Ghana.
authors.forename: Peter Osei
authors.initials: PO
authors.lastname: Boamah
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Huang
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Mingqing
authors.initials: M
authors.lastname: Hua
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; Hainan Provincial Key Lab of Fine Chemistry, Hainan University, Haikou 570228, China. Electronic address: qzhang@ujs.edu.cn.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Ecological Agriculture, Bolgatanga Polytechnic, Bolgatanga, Ghana.
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Onumah
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Yongxiu
authors.initials: Y
authors.lastname: Song
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000737:chemistry / Q000302:isolation & purification*; D048271:Chitosan / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D019289:Pyruvic Acid / Q000737:chemistry*; D012996:Solutions; D013696:Temperature; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D012996:Solutions; D014874:Water Pollutants, Chemical; D002104:Cadmium; D019289:Pyruvic Acid; D048271:Chitosan
keywords: Cadmium; Chelation; Glutaraldehyde; Low molecular weight chitosan; Pyruvic acid