title: A combined process of adsorption and Fenton-like oxidation for furfural removal using zero-valent iron residue.
abstract: In this study, the feasibility of using a combined adsorption and Fenton-like oxidation process (with zero-valent iron (ZVI) residue from heat wraps as an absorbent and catalyst) to remove furfural in the solution was evaluated. The influencing parameters (e.g. pH, H2O2 concentration, initial furfural concentration) and the reusability of ZVI residue (to replace the iron powder) were estimated. The ZVI residue was found to have much better adsorption effect on furfural at pH 2.0 compared with pH 6.7. For Fenton-like reaction alone with ZVI residue, the highest furfural removal of 97.5% was observed at the concentration of 0.176 mol/L H2O2, and all of the samples had >80% removal efficiency at different initial furfural concentrations of 2, 10, 20, 30 and 40 mmol/L. However, with a combined adsorption and Fenton-like oxidation, the removal efficiency of furfural was nearly 100% for all treatments. The ZVI residue used for furfural removal was much better than that of iron powder in the Fenton-like reaction at a seven-cycle experiment. This study suggests the combined process of adsorption and Fenton-like oxidation using ZVI residue is effective for the treatment of furfural in the liquid.
authors.affiliation: a State Key Laboratory of Biogeology and Environmental Geology , China University of Geosciences , Wuhan 430074 , People's Republic of China.|b Chemical & Environmental of Engineering College , Wuhan Polytechnic University , Wuhan 430023 , People's Republic of China.
authors.forename: Furong
authors.initials: F
authors.lastname: Li
authors.affiliation: a State Key Laboratory of Biogeology and Environmental Geology , China University of Geosciences , Wuhan 430074 , People's Republic of China.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Bao
authors.affiliation: c Civil Engineering Department , University of Nebraska-Lincoln , Omaha , NE 68182-0178 , USA.
authors.forename: Tian C
authors.initials: TC
authors.lastname: Zhang
authors.affiliation: c Civil Engineering Department , University of Nebraska-Lincoln , Omaha , NE 68182-0178 , USA.
authors.forename: Yutian
authors.initials: Y
authors.lastname: Lei
mesh_terms: D000327:Adsorption; D005662:Furaldehyde / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D005662:Furaldehyde; D006861:Hydrogen Peroxide; D007501:Iron; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Fenton-like reaction; adsorption; furfural; heat wrap; zero-valent iron (ZVI)