Rapid removal of bisphenol A on highly ordered mesoporous carbon

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 sil...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2011-01, Vol.23 (2), p.177-182
Main Authors: Sui, Qian, Huang, Jun, Liu, Yousong, Chang, Xiaofeng, Ji, Guangbin, Deng, Shubo, Xie, Tao, Yu, Gang
Format: Article
Language:English
Subjects:
activated carbon
adsorbents
Adsorption
aquatic environment
Benzhydryl Compounds
bisphenol A
Carbon - chemistry
CMK-3
endocrine disrupting chemicals
Endocrine Disruptors - isolation & purification
Freundlich模型
Hydrogen-Ion Concentration
Kinetics
Langmuir模型
mesoporous carbon
Microscopy, Electron, Transmission
nitrogen
Phenols - isolation & purification
powdered activated carbon
silica
sorption isotherms
surface area
temperature
transmission electron microscopy
Water Pollutants, Chemical - isolation & purification
X-Ray Diffraction
介孔二氧化硅
双酚A
吸附能力
有序介孔
透射电子显微镜
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Summary: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 m^2/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℃. No significant influence of pH on adsorption was observed at pH 3 to 9; however, adsorption capacity decreased dramatically from pH 9 to 13.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(10)60391-9