title: Rapid removal of bisphenol A on highly ordered mesoporous carbon.
abstract: Bisphenol A (BPA) is of global concern due to its disruption of endocrine systems and ubiquity in the aquatic environment. It is important, therefore, that efforts are made to remove it from the aqueous phase. A novel adsorbent, mesoporous carbon CMK-3, prepared from hexagonal SBA-15 mesoporous silica was studied for BPA removal from aqueous phase, and compared with conventional powdered activated carbon (PAC). Characterization of CMK-3 by transmission electron microscopy (TEM), X-ray diffraction, and nitrogen adsorption indicated that prepared CMK-3 had an ordered mesoporous structure with a high specific surface area of 920 m2/g and a pore-size of about 4.9 nm. The adsorption of BPA on CMK-3 followed a pseudo second-order kinetic model. The kinetic constant was 0.00049 g/(mg x min), much higher than the adsorption of BPA on PAC. The adsorption isotherm fitted slightly better with the Freundlich model than the Langmuir model, and adsorption capacity decreased as temperature increased from 10 to 40 degrees C. No significant influence of pH on adsorption was observed at pH 3 to 9; however, adsorption capacity decreased dramatically from pH 9 to 13.
authors.affiliation: Department of Environmental Science and Engineering, Tsinghua University-VEOLIA Environnement Joint Research Center for Advanced Environmental Technology, Tsinghua University, Beijing 100084, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Sui
authors.forename: Jun
authors.initials: J
authors.lastname: Huang
authors.forename: Yousong
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Chang
authors.forename: Guangbin
authors.initials: G
authors.lastname: Ji
authors.forename: Shubo
authors.initials: S
authors.lastname: Deng
authors.forename: Tao
authors.initials: T
authors.lastname: Xie
authors.forename: Gang
authors.initials: G
authors.lastname: Yu
mesh_terms: D000327:Adsorption; D001559:Benzhydryl Compounds; D002244:Carbon / Q000737:chemistry*; D052244:Endocrine Disruptors / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D046529:Microscopy, Electron, Transmission; D010636:Phenols / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014961:X-Ray Diffraction; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D002244:Carbon; D052244:Endocrine Disruptors; D010636:Phenols; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds