Rapid removal of bisphenol A on highly ordered mesoporous carbon |
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Authors: | Qian Sui Jun Huang Yousong Liu Xiaofeng Chang Guangbin Ji Shubo Deng Tao Xie and Gang Yu |
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Institution: | [1]Department of Environmental Science and Engineering, Tsinghua University - VEOLIA Environnement Joint Research Center for Advanced Environmental Technology; Tsinghua University, Beijing 100084 [2]Nanomaterials Research Institute, College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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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 e orts 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 di raction, 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 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°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. |
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Keywords: | mesoporous carbon CMK-3 powdered activated carbon bisphenol A endocrine disrupting chemicals |
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