Development of modified mesoporous carbon (CMK-3) for improved adsorption of bisphenol-A
- Authors
- Jeong, Yunjae; Cui, Mingcan; Choi, Jongbok; Lee, Yonghyeon; Kim, Jeonggwan; Son, Younggyu; Khim, Jeehyeong
- Issue Date
- 1월-2020
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Ordered mesoporous carbons CMK-3; Modified CMK-3; Activation energy; Gigs free energy; Bisphenol-A
- Citation
- CHEMOSPHERE, v.238
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMOSPHERE
- Volume
- 238
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/58466
- DOI
- 10.1016/j.chemosphere.2019.124559
- ISSN
- 0045-6535
- Abstract
- The adsorption of bisphenol-A (BPA) on ordered mesoporous carbon (CMK-3) and modified CMK-3 (MCMK-3) for decontamination of aqueous medium was investigated. The CMK-3 and MCMK-3 materials had uniform pore sizes of 3.60 and 3.70 nm and high Brunauer-Emmett-Teller (BET) surface areas of 751 and 564 m(2) g(-1), respectively. The maximum adsorption capacities of CMK-3 and MCMK-3 were 178.57 (0.24 mg m(-2)) and 238.01 (0.42 mg m(-2)) mg g(-1), respectively at 298 K (pH 6.4). The difference in the adsorption capacities is attributed to the specific surface area and hydrophobicity of the adsorbents. The adsorption of BPA on CMK-3 and MCMK-3 may be influenced by pi-pi bonding and hydrophobic and electrostatic interactions, and the excellent adsorption capacity of MCMK-3 is attributed to its unique sp2-hybridized single-atom-layer structure. The kinetics and isotherm data were described by the pseudo-second order kinetic model and the Langmuir isotherm, respectively. This difference in the adsorption kinetics of CMK-3 and MCMK-3 is caused by the increase in the pore diameter of the latter. Further, CMK-3 and MCMK-3, with an open geometry consisting of interlinked nanorods, allow for faster intraparticle diffusion. Overall, CMK-3 and MCMK-3 could be promising adsorbents for the removal of chemicals containing benzene rings from wastewater. (C) 2019 Published by Elsevier Ltd.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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