title: Biosorption of As(V) onto dried alligator weed root: role of metal (hydro) oxides.
abstract: The present work investigates the adsorption of As(V) onto the dried powder of alligator weed root as bio-sorbent, using acid pre-treated alligator weed root powder as the reference. The isotherm study suggested there is a favorable As(V) adsorption happened on the AWR surface. The batch adsorption experimental results indicated that the ionic strength has little impact on the adsorption, while the solution pH has a significant effect on the adsorption with apparent inhibition appearing in both extreme acidic and alkaline pH region. In addition, the properties of the biosorbent were characterized by various techniques including SEM-EDS, FT-IR, and ICP detection. The analysis results suggested that the metals including Mn, Fe, and Al enrich over the alligator weed root surface in the morphology of metal (hydro) oxide. Based on the nature of the biosorbent and As(V) besides the adsorption performance, the metal (hydro) oxides over biosorbent surface is suggested as the essential role to drive the adsorption. With the metal (hydro) oxides denuded in the pre-treatment, the biosorbent loses its adsorption capability for As(V) totally.
authors.affiliation: a State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing , PR China.|b Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, School of Chemistry and Engineering , Yancheng Teachers University , Yancheng , Jiangsu , PR China.
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.affiliation: b Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, School of Chemistry and Engineering , Yancheng Teachers University , Yancheng , Jiangsu , PR China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Tao
authors.affiliation: a State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University , Nanjing , PR China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Sun
mesh_terms: D000327:Adsorption; D027703:Amaranthaceae / Q000737:chemistry / Q000378:metabolism*; D001151:Arsenic / Q000032:analysis / Q000378:metabolism*; D001673:Biodegradation, Environmental; D052918:Environmental Restoration and Remediation / Q000379:methods*; D018517:Plant Roots / Q000737:chemistry / Q000378:metabolism*; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: As(V); alligator weed root; biosorption; metal (hydro) oxide