title: Synthesis of iron oxyhydroxide-coated rice straw (IOC-RS) and its application in arsenic(V) removal from water.
abstract: Because of the recognition that arsenic (As) at low concentrations in drinking water causes severe health effects, the technologies of As removal have become increasingly important. In this study, a simplified and effective method was used to immobilize iron oxyhydroxide onto a pretreated naturally occurring rice straw (RS). The modified RS adsorbent was characterized, using scanning electron microscope, Fourier transform infrared spectroscopy, thermogravimetric analyzer, and surface area analyzer. Experimental batch data of As(V) adsorption were modeled by the isotherms and kinetics models. Although all isotherms, the Langmuir model fitted the equilibrium data better than Freundlich and Dubinin-Radushkevich models and confirmed the surface homogeneity of adsorbent. The iron oxyhydroxide-coated rice straw (IOC-RS) was found to be effective for the removal of As(V) with 98.5% sorption efficiency at a concentration of <50 mg/L of As(V) solution, and thus maximum uptake capacity is ∼22 and 20 mg As(V)/g of IOC-RS at pH 4 and 6, respectively. The present study might provide new avenues to achieve the As concentrations required for drinking water recommended by the World Health Organization.
authors: Laboratoire de Chimie Analytique, Environnementale et Bio-Organique, UFR-SEA, Université de Ouagadougou, 03 BP 7021 Ouagadougou 03, Burkina Faso E-mail: ouedigor@yahoo.fr; Institute of Ecological Chemistry and Waste Analysis, Technical University of Braunschweig, Hagenring 30, Braunschweig 38106, Germany; Biomass Energy and Biofuels Laboratory (LBEB), International Institute for Water and Environmental Engineering (2iE Foundation), Ouagadougou 01 01 BP 594, Burkina Faso.
authors: Igor W K
authors: IW
authors: Ouédraogo
authors: Department of Chemical Engineering, Selcuk University, Campus, 42031 Konya, Turkey; Institute of Ecological Chemistry and Waste Analysis, Technical University of Braunschweig, Hagenring 30, Braunschweig 38106, Germany.
authors: Erol
authors: E
authors: Pehlivan
authors: Hanoi University of Science, Hanoi, Vietnam; Institute of Ecological Chemistry and Waste Analysis, Technical University of Braunschweig, Hagenring 30, Braunschweig 38106, Germany.
authors: Hien T
authors: HT
authors: Tran
authors: Laboratoire de Chimie Analytique, Environnementale et Bio-Organique, UFR-SEA, Université de Ouagadougou, 03 BP 7021 Ouagadougou 03, Burkina Faso E-mail: ouedigor@yahoo.fr.
authors: Yvonne L
authors: YL
authors: Bonzi-Coulibaly
authors: Institute of Ecological Chemistry and Waste Analysis, Technical University of Braunschweig, Hagenring 30, Braunschweig 38106, Germany.
authors: Dieter
authors: D
authors: Zachmann
authors: Institute of Ecological Chemistry and Waste Analysis, Technical University of Braunschweig, Hagenring 30, Braunschweig 38106, Germany.
authors: Müfit
authors: M
authors: Bahadir
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry / Q000302:isolation & purification*; D005290:Ferric Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D012275:Oryza / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; C021024:ferric hydroxide; D001151:Arsenic