title: Adsorption study of an organo-arsenical with chitosan-based sorbents.
abstract: In this study, chitosan-based copolymers were prepared at various weight ratios of chitosan (C) to glutaraldehyde (G): 1:1 (CG11), 2:1 (CG21), and 3:1 (CG31). The sorption properties of these copolymers were investigated with roxarsone in simulated aquatic conditions at pH 7 in phosphate buffer, similar to that found in poultry litter leachate. The relative sorption capacity (Q(m); mmol/g) of the sorbents are listed in parentheses in descending order: CG11 (1.80)>CG31 (0.945)>CG21 (0.802)>chitosan (0.416). The sorptive properties of the copolymers are comparable to granular activated carbon (GAC), a standard carbonaceous sorbent material, where Q(m)=2.36 mmol/g. The adsorption properties of phenolic adsorbates such as o-nitrophenol, p-nitrophenol, and roxarsone with the CG copolymers and GAC were investigated at various pH and compared with phosphate and carbonate buffer systems.
authors.affiliation: Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada.
authors.forename: Louis
authors.initials: L
authors.lastname: Poon
authors.affiliation: Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada.
authors.forename: Shaguftah
authors.initials: S
authors.lastname: Younus
authors.affiliation: Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada. Electronic address: lee.wilson@usask.ca.
authors.forename: Lee D
authors.initials: LD
authors.lastname: Wilson
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D005976:Glutaral / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D048271:Chitosan; D001151:Arsenic; D005976:Glutaral
keywords: 4-Hydroxy-3-nitrobenzene arsonic acid; Adsorption; Arsenical; Chitosan; Copolymers; Glutaraldehyde; Nitrophenols