title: Lead removal onto cross-linked low molecular weight chitosan pyruvic acid derivatives.
abstract: Adsorption capacity of cross-linked low molecular weight chitosan pyruvic acid derivatives CSnPA-GLA (n=8, 11) were examined by employing 2(3) factorial design method. Three (3) factors and two (2) levels of adsorbent dose (A) (0.05 and 0.1 g), adsorbent type (B) (CS8PA-GLA and CS11PA-GLA) and concentration of lead solution (C) (1 and 3 mg/L) were considered. From the statistical analysis, all the main parameters (A, B and C) and some interactions of the main parameters (AC and ABC) had influence on the adsorption process at 5% significance level. The adsorption process was greatly influenced by the adsorbent type (B). The adsorption equilibrium results correlated well with the Freundlich isotherm model. The adsorption kinetic data also correlated well with the pseudo second order. The thermodynamic studies also revealed that the nature of lead adsorption was spontaneous and endothermic. The findings suggest that CS8PA-GLA is better than CS11PA-GLA for lead 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; 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: Mingqing
authors.initials: M
authors.lastname: Hua
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: Yun
authors.initials: Y
authors.lastname: Liu
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: Yuanyuan
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D048271:Chitosan / Q000031:analogs & derivatives*; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D019289:Pyruvic Acid / Q000031:analogs & derivatives*; D013816:Thermodynamics; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D014874:Water Pollutants, Chemical; D007854:Lead; D019289:Pyruvic Acid; D048271:Chitosan
keywords: Factorial design; Lead removal; Low molecular weight chitosan; Pyruvic acid; Water pollution