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 m2 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 π-π 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.
| Original language | English |
|---|---|
| Article number | 124559 |
| Journal | Chemosphere |
| Volume | 238 |
| DOIs | |
| Publication status | Published - 2020 Jan 1 |
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Keywords
- Activation energy
- Bisphenol-A
- Gigs free energy
- Modified CMK-3
- Ordered mesoporous carbons CMK-3
ASJC Scopus subject areas
- Environmental Engineering
- Environmental Chemistry
- Chemistry(all)
- Pollution
- Health, Toxicology and Mutagenesis
Cite this
Development of modified mesoporous carbon (CMK-3) for improved adsorption of bisphenol-A. / Jeong, Yunjae; Cui, Mingcan; Choi, Jongbok; Lee, Yonghyeon; Kim, Jeonggwan; Son, Younggyu; Khim, Jeehyeong.
In: Chemosphere, Vol. 238, 124559, 01.01.2020.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development of modified mesoporous carbon (CMK-3) for improved adsorption of bisphenol-A
AU - Jeong, Yunjae
AU - Cui, Mingcan
AU - Choi, Jongbok
AU - Lee, Yonghyeon
AU - Kim, Jeonggwan
AU - Son, Younggyu
AU - Khim, Jeehyeong
PY - 2020/1/1
Y1 - 2020/1/1
N2 - 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 m2 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 π-π 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.
AB - 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 m2 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 π-π 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.
KW - Activation energy
KW - Bisphenol-A
KW - Gigs free energy
KW - Modified CMK-3
KW - Ordered mesoporous carbons CMK-3
UR - http://www.scopus.com/inward/record.url?scp=85070926428&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070926428&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2019.124559
DO - 10.1016/j.chemosphere.2019.124559
M3 - Article
VL - 238
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
M1 - 124559
ER -