title: Landfill leachate treatment by a coagulation-photooxidation process.
abstract: This experimental study was conducted to investigate the effect of treatment of landfill leachate by a coagulation-photooxidation process. The effects of different dosages of coagulant and different pH values on the coagulation processes were compared. The effect of different concentrations of sodium oxalate (Na(2)C(2)O(4)) on the treatment process was also studied after the coagulation was performed using FeCl(3).6H(2)O. The experimental results show that in the pH range of 3-8, the lower the pH value, the higher the efficiency of the treatment. A 24% removal of COD (chemical oxygen demand, mg(O(2)) x l(-1)) can be attained by the addition of 1000 mg x l(-1) FeCl(3). A 31% removal of COD can be attained after 4h of irradiation alone, and a 64% removal of COD can be attained after 4h irradiation at pH 3 with the addition of 500 mg x l(-1) FeCl(3).6H(2)O.
authors.affiliation: Department of Environmental Science and Engineering, Wuhan University, Wuhan 430072, PR China.
authors.forename: Zong-ping
authors.initials: ZP
authors.lastname: Wang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yue-juan
authors.initials: YJ
authors.lastname: Lin
authors.forename: Nan-sheng
authors.initials: NS
authors.lastname: Deng
authors.forename: Tao
authors.initials: T
authors.lastname: Tao
authors.forename: Kui
authors.initials: K
authors.lastname: Zhuo
mesh_terms: D002712:Chlorides; D005290:Ferric Compounds; D005609:Free Radicals; D010070:Oxalates; D010083:Oxidants, Photochemical; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014877:Water Pollution, Chemical / Q000517:prevention & control
chemical_list: D002712:Chlorides; D005290:Ferric Compounds; D005609:Free Radicals; D010070:Oxalates; D010083:Oxidants, Photochemical; C024555:ferric chloride