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Zhao H, Tang Z, He M, Yang X, Lai S, An K, Han S, Qu Z, Zhou W, Wang Z. Effect of oxygen functional groups on competitive adsorption of benzene and water on carbon materials: Density functional theory study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 863:160772. [PMID: 36513224 DOI: 10.1016/j.scitotenv.2022.160772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/16/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
It is important to study the effect of oxygen-containing functional groups on the competitive adsorption mechanism of benzene and water on the surface of carbon materials, and to directional modification of activated carbon to improve its selective adsorption of benzene in air. In this study, the adsorption characteristics of benzene and water on original and linked ester, carboxyl, hydroxyl, carbon materials linked by ether groups were calculated by quantum chemical simulation based on density functional theory. The types and proportions of weak interactions in the adsorption process were calculated by energy decomposition analysis, and the adsorption mechanism of carbon materials for water and benzene was described. The influence and contribution of oxygen-containing functional groups on the adsorption of benzene and water were further analyzed by van der Waals potential and electrostatic potential, respectively, so as to determine the difference in the adsorption effect of different types of oxygen-containing functional groups on the two molecules. It was found that the carboxyl group has a great influence on the hydrophilicity of carbon materials, and the electrostatic potential distribution before and after linking the carboxyl group changed significantly. Therefore, they can attract each other with water through hydrogen bonds and occupy the surface adsorption sites of carbon materials, thereby inhibiting the adsorption of benzene on carbon materials. On the contrary, due to its hydrophobic properties, the ether group will free up adsorption space for the adsorption of benzene on the surface of the carbon material, which is beneficial to the adsorption of benzene. The adsorption experiments were carried out, and the results were consistent with the simulation. This study provides an idea for preparing efficient carbonaceous adsorbent of benzene and reducing benzene pollution in industry.
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Affiliation(s)
- Haiqian Zhao
- School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Ziyu Tang
- School of Civil and Architectural Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Mingqi He
- School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Xue Yang
- School of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Shiwei Lai
- School of Civil and Architectural Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Kaibo An
- School of Civil and Architectural Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Shuaishuai Han
- School of Civil and Architectural Engineering, Northeast Petroleum University, Daqing 163318, China
| | - Zhibin Qu
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Wei Zhou
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Zhonghua Wang
- School of Civil and Architectural Engineering, Northeast Petroleum University, Daqing 163318, China.
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Markova EB, Krasil’nikova OK, Grankina TY, Serov YM. Effect of conditions of thermal treatment on the porous structure of an aluminum oxide-containing nanofibrous aerogel. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2016. [DOI: 10.1134/s0036024416080185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Vartapetyan RS, Voloshchuk AM. The mechanism of the adsorption of water molecules on carbon adsorbents. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1995v064n11abeh000189] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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CHIANG HUNGLUNG, TSAI JIUNHORNG, TSAI CHIENLIANG, HSU YICHUN. Adsorption Characteristics of Alkaline Activated Carbon Exemplified by Water Vapor, H2S, and CH3SH Gas. SEP SCI TECHNOL 2007. [DOI: 10.1081/ss-100100200] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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