title: Factors affecting the adsorptive removal of bisphenol A in landfill leachate by high silica Y-type zeolite.
abstract: Although bisphenol A (BPA), a representative endocrine-disrupting compound, has been detected frequently in landfill leachate, effective technologies for BPA removal from landfill leachates are limited. We used high silica Y-type zeolite (HSZ-385) for the selective adsorption of BPA from landfill leachate, and factors affecting this adsorption are discussed. Higher removal efficiencies at pH 5.0-9.0 imply that neutral BPA is adsorbed more easily onto HSZ-385 than monomeric or divalent BPA anions. An increase in ionic strength and sodium acetate concentration did not affect BPA adsorption significantly, while the removal efficiency decreased slightly when more than 50 mgC/L of humic acid was added. HSZ-385 was applied to synthetic leachates that simulate the composition of landfill leachate at various degradation stages. In young acidic leachates that contain sodium acetate, the use of HSZ-385 for the adsorptive removal of BPA appears to be more effective than in old alkaline leachates, which contain large amounts of humic acid. In addition, 82 % BPA removal was achieved from young raw leachates using HSZ-385, which demonstrates that selective BPA removal from actual landfill leachate has been achieved.
authors.affiliation: Research and Education Faculty, Natural Sciences Cluster, Agriculture Unit, Kochi University, 200 Monobe Otsu, Nankoku, Kochi, 783-8502, Japan, jm-chen@kochi-u.ac.jp.
authors.forename: Xiaoqiang
authors.initials: X
authors.lastname: Chen
authors.forename: Taku
authors.initials: T
authors.lastname: Fujiwara
authors.forename: Shuji
authors.initials: S
authors.lastname: Fukahori
authors.forename: Tomonori
authors.initials: T
authors.lastname: Ishigaki
mesh_terms: D000327:Adsorption; D001559:Benzhydryl Compounds / Q000032:analysis / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D006812:Humic Substances / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D010636:Phenols / Q000032:analysis / Q000302:isolation & purification*; D012822:Silicon Dioxide / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D017641:Zeolites / Q000737:chemistry*; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D006812:Humic Substances; D010636:Phenols; D012822:Silicon Dioxide; D014874:Water Pollutants, Chemical; D017641:Zeolites; C006780:bisphenol A; D000098826:Bisphenol A Compounds