title: Mechanisms of Cr(III) and Cr(VI) removal from aqueous solutions by sugar beet pulp.
abstract: The removal of three- and hexavalent chromium from aqueous solutions using sugar beet pulp as biosorbent substratewas performed. The kinetics of Cr(III) and Cr(VI) removal were studied at 20.0 +/- 0.5 degrees C and under various experimental conditions. The Cr(III) ions were adsorbed onto the biosorbent by ion-exchange mechanism with Ca2+ cations. The influence of solution pH was found to greatly affect the adsorption efficiency of Cr(VI). Cr(VI) removal was largely involved in a reduction mechanism with the appearance of Cr(III) ions in the solution.
authors.affiliation: Ecole des Mines de Nantes, GEPEA, 4 rue Alfred Kastler, BP 20722, 44307 Nantes 3, France.
authors.forename: Z
authors.initials: Z
authors.lastname: Reddad
authors.forename: C
authors.initials: C
authors.lastname: Gerente
authors.forename: Y
authors.initials: Y
authors.lastname: Andres
authors.forename: P
authors.initials: P
authors.lastname: Le Cloirec
mesh_terms: D027461:Beta vulgaris; D001673:Biodegradation, Environmental; D002274:Carcinogens, Environmental / Q000302:isolation & purification*; D002857:Chromium / Q000302:isolation & purification*; D007474:Ion Exchange; D010084:Oxidation-Reduction; D018508:Water Purification / Q000379:methods*
chemical_list: D002274:Carcinogens, Environmental; D002857:Chromium; C074702:chromium hexavalent ion