title: Integration of US/Fe(2+) and photo-Fenton in sequencing for degradation of landfill leachate.
abstract: The landfill leachate treated by sonication in presence of Fe(2+) (US/Fe(2+)) and then by photo-Fenton achieved the highest total organic carbon (TOC) removal efficiency among the screened processes. The lower initial pH, dosage of Fe(2+) and initial concentration of leachate were helpful in raising TOC removal efficiency of leachate by US/Fe(2+). The optimal conditions for the US-photo-Fenton process were as follows: initial pH at 3.0, [H2O2]/[TOC0] at 2, [H2O2]/[Fe(2+)] at 5 and initial concentration of landfill leachate at 600 mg/L. The removal efficiency of TOC, chemical oxygen demand (COD) and 5-day biochemical oxygen demand (BOD5) were 68.3, 79.6 and 58.2%, while the BOD5/COD rose from 0.20 to 0.43 at optimum condition. Based on gas chromatography-mass spectrometry (GC-MS) results, 36 of a total of 56 pollutants were completely degraded by US-photo-Fenton treatment.
authors.affiliation: School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail: xmwang-2004@126.com.
authors.forename: F G
authors.initials: FG
authors.lastname: Zha
authors.affiliation: School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail: xmwang-2004@126.com.
authors.forename: D X
authors.initials: DX
authors.lastname: Yao
authors.affiliation: School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail: xmwang-2004@126.com.
authors.forename: Y B
authors.initials: YB
authors.lastname: Hu
authors.affiliation: School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail: xmwang-2004@126.com.
authors.forename: L M
authors.initials: LM
authors.lastname: Gao
authors.affiliation: School of Earth & Environment, Anhui University of Science & Technology, Huainan, Anhui 232001, China E-mail: xmwang-2004@126.com.
authors.forename: X M
authors.initials: XM
authors.lastname: Wang
mesh_terms: D057919:Biological Oxygen Demand Analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D010782:Photolysis; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: C045076:Fenton's reagent; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron