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Zheng Y, Huang W, Chen W, Li X, Wang X, Zhang Z, Wu C, Fu L. Effect analysis of initial water content and temperature on the adsorption of VOCs by activated carbon based on molecular simulation. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2137066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Yongyin Zheng
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
| | - Weiqiu Huang
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
| | - Weihua Chen
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
| | - Xufei Li
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
- School of Materials Science and Engineering, Changzhou University, Changzhou, People’s Republic of China
| | - Xinya Wang
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
- School of Materials Science and Engineering, Changzhou University, Changzhou, People’s Republic of China
| | - Zhen Zhang
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
| | - Chunyan Wu
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
| | - Lipei Fu
- Jiangsu Provincial Key Laboratory of Oil-Gas Storage and Transportation Technology, Engineering Technology Research Centre for Oil Vapor Recovery, Changzhou University, Changzhou, People’s Republic of China
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Liu H, Cheng C, Wu H. Sustainable utilization of wetland biomass for activated carbon production: A review on recent advances in modification and activation methods. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 790:148214. [PMID: 34380280 DOI: 10.1016/j.scitotenv.2021.148214] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 05/29/2021] [Accepted: 05/29/2021] [Indexed: 06/13/2023]
Abstract
Constructed wetlands (CWs) as a green eco-technology have been applied for treating various wastewaters for several decades. However, sustainable reclamation of the harvested wetland biomass remains a challenge. Utilization of wetland biomass for value-added activated carbon (AC) production could be a potential strategy to improve the sustainability with multi-functions such as energy storage, resource recovery and environmental remediation. This paper aims to present a comprehensive review on the recent advances in production of ACs from wetland biomass and their application for adsorption of metal ions from wastewaters. The physicochemical properties of the ACs with chemical activations and their feasibility for heavy metal ions adsorption are compared, and the adsorption mechanisms are found to be complexation, physical adsorption, ion-exchange and electrostatic interactions. The surface chemistry of ACs impacted more on the adsorption ability towards heavy metal ions than their porosity. The in-situ modification during H3PO4 activation and new phosphorus-based activation are also summarized for enhancing the surface functionality and introducing specific surface functionalities on ACs, in turn promoting their adsorption ability for heavy metal ions. The high adsorption capacity and cost-effectiveness make these ACs as economical alternatives for waste remediation, and future research on the optimization and applications of ACs was also highlighted.
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Affiliation(s)
- Hai Liu
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health and Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 510632, PR China
| | - Cheng Cheng
- College of Environmental and Ecology, Chongqing University, Chongqing 400045, PR China.
| | - Haiming Wu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, PR China.
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Kim WK, Younis SA, Kim KH. A strategy for the enhancement of trapping efficiency of gaseous benzene on activated carbon (AC) through modification of their surface functionalities. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 270:116239. [PMID: 33341551 DOI: 10.1016/j.envpol.2020.116239] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/21/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
Facile modification is a common, but effective, option to improve the uptake removal capacity of of activated carbon (AC) against diverse target volatile organic compounds (VOCs; e.g., benzene) in gaseous streams. To help design the routes for such modification, this research built strategies to generate three types of modified ACs by incorporating amine/sulfur/amino-silane groups under solvothermal or microwave (MW) thermal conditions. The adsorption performance has been tested using a total of six types of AC sorbents (three modified + three pristine forms) for the capture of 1 Pa benzene (1 atm and 298 K). The obtained results are evaluated in relation to their textural properties and surface functionalities. Accordingly, the enhancement of AC surface basicity (e.g., point of zero charge (PZC) = 10.25), attained via the silylation process, is accompanied by the reduced adsorption of benzene (a weak base). In contrast, ACs amended with amine/sulfur (electron-donating) groups using the MW technique are found to acquire high surface acidity (PZC of 5.99-6.05) to exhibit significantly improved benzene capturing capability (relative to all others). Their uplifted performance is demonstrated in terms of key performance metrics such as breakthrough volume (BTV10%: 163 → 443 L g-1), adsorption capacity (Q10%: 4.82 → 13.6 mg g-1), and partition coefficient (PC10%: 0.516 → 1.67 mol kg-1 Pa-1). Based on the kinetic analysis, the overall adsorption process is found to be governed by pore diffusion as the main rate-determining step, along with surface interaction mechanisms. The results of this research clearly support the critical role of surface chemistry of AC adsorbents and their textural properties in upgrading air/gas purification systems.
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Affiliation(s)
- Won-Ki Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-Gu, Seoul, 04763, Republic of Korea
| | - Sherif A Younis
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-Gu, Seoul, 04763, Republic of Korea; Analysis and Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt; Nanobiotechnology Program, Faculty of Nanotechnology for Postgraduate Studies, Cairo University, Sheikh Zayed Branch Campus, Sheikh Zayed City, Giza, PO 12588, Egypt
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-Gu, Seoul, 04763, Republic of Korea.
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Li S, Yu L, Song K, Zhao D. Study on Microscopic Mechanism of Activated Carbon Adsorption of Benzene by Molecular Simulation Technology. CHEM LETT 2020. [DOI: 10.1246/cl.200510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shi Li
- College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Lan Yu
- College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Kunli Song
- College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Dongfeng Zhao
- College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
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Yuan C, Huang Y, Cannon FS, Zhao Z. Adsorption mechanisms of PFOA onto activated carbon anchored with quaternary ammonium/epoxide-forming compounds: A combination of experiment and model studies. J Environ Sci (China) 2020; 98:94-102. [PMID: 33097163 DOI: 10.1016/j.jes.2020.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/17/2020] [Accepted: 05/20/2020] [Indexed: 06/11/2023]
Abstract
When wood-based activated carbon was tailored with quaternary ammonium/epoxide (QAE) forming compounds (QAE-AC), this tailoring dramatically improved the carbon's effectiveness for removing perfluorooctanoic acid (PFOA) from groundwater. With favorable tailoring, QAE-AC removed PFOA from groundwater for 118,000 bed volumes before half-breakthrough in rapid small scale column tests, while the influent PFOA concentration was 200 ng/L. The tailoring involved pre-dosing QAE at an array of proportions onto this carbon, and then monitoring bed life for PFOA removal. When pre-dosing with 1 mL QAE, this PFOA bed life reached an interim peak, whereas bed life was less following 3 mL QAE pre-dosing, then PFOA bed life exhibited a steady rise for yet subsequently higher QAE pre-dosing levels. Large-scale atomistic modelling was used herein to provide new insight into the mechanism of PFOA removal by QAE-AC. Based on experimental results and modelling, the authors perceived that the QAE's epoxide functionalities cross-linked with phenolics that were present along the activated carbon's graphene edge sites, in a manner that created mesopores within macroporous regions or created micropores within mesopores regions. Also, the QAE could react with hydroxyls outside of these pore, including the hydroxyls of both graphene edge sites and other QAE molecules. This latter reaction formed new pore-like structures that were external to the activated carbon grains. Adsorption of PFOA could occur via either charge balance between negatively charged PFOA with positively charged QAE, or by van der Waals forces between PFOA's fluoro-carbon tail and the graphene or QAE carbon surfaces.
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Affiliation(s)
- Chen Yuan
- Shenzhen Academy of Environmental Science, Shenzhen 518001, China; College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China; Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA 16802, USA.
| | - Yang Huang
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China
| | - Fred S Cannon
- Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, PA 16802, USA
| | - Zhiwei Zhao
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China
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Monte Carlo simulations of simple gases adsorbed onto graphite and molecular models of activated carbon. ADSORPTION 2020. [DOI: 10.1007/s10450-020-00254-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yuan C, Huang Y, Cannon FS, Geng C, Liang Z, Zhao Z. Removing PFOA and nitrate by quaternary ammonium compounds modified carbon and its mechanisms analysis: Effect of base, acid or oxidant pretreatment. CHEMOSPHERE 2020; 242:125233. [PMID: 31896207 DOI: 10.1016/j.chemosphere.2019.125233] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 10/24/2019] [Accepted: 10/25/2019] [Indexed: 06/10/2023]
Abstract
Acid/base/oxidant pretreatment influenced subsequent quaternary ammonium epoxide compounds modified carbon (QAE-AC) and hence PFOA and nitrate removal. This work discerned that the most favorable QAE-AC protocol for PFOA removal was achieved when the wood carbon pretreated with HNO3 to adjust the carbon's slurry pH to 4.77, and tailored with the QUAB188. For nitrate removal, the most favorable when the carbon was pretreated with NaOH to raise the carbon's slurry pH to 9.34, and then loaded with the QUAB360. Based on experimentally results and molecular model, we found that pore volume, phenolic groups and the surface charge were the main factors affecting the PFOA removal, while the only factor affecting nitrate removal was surface charge. The QUAB's epoxide functionalities have cross-linked with phenolics along the activated carbon's graphene edge sites. QAE is preferentially reacted with the phenolic in the micropores and mesopores of carbon, and some QAE molecules form new "pore-like structures" outside the pores with the graphene planes or other QAE molecules. This pore-like structure hosted adsorption capacity by the quaternary ammonium. The favorable PFOA adsorption sites were in smaller mesopores via both hydrophobic interaction and electrostatic interaction; and nitrate sorption was occurring in the smaller micropores via anion exchange. Therefore, it can be considered that QAE-AC can simultaneously adsorb PFOA and nitrate in water.
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Affiliation(s)
- Chen Yuan
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400045, China; Department of Civil and Environmental Engineering, Pennsylvania State University, 225 Sackett Building, University Park, PA, 16802, USA.
| | - Yang Huang
- College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan, 610225, China.
| | - Fred S Cannon
- Department of Civil and Environmental Engineering, Pennsylvania State University, 225 Sackett Building, University Park, PA, 16802, USA.
| | - Cong Geng
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400045, China.
| | - Zhijie Liang
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400045, China.
| | - Zhiwei Zhao
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400045, China.
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Liu A, Jain SK, Jin Q, Peng X. Adsorption and structure of benzene confined in disordered porous carbons: effect of pore heterogeneity and surface chemistry. MOLECULAR SIMULATION 2018. [DOI: 10.1080/08927022.2018.1496249] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Anqi Liu
- Center for Safety, Environmental & Energy Conservation Technology, China University of Petroleum, Beijing, People’s Republic of China
- CNPC Research Institute of Safety and Environment Technology, Beijing, People’s Republic of China
| | - Surendra Kumar Jain
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, India
| | - Qibing Jin
- College of Information Science and Technology, Beijing University of Chemical Technology, Beijing, People’s Republic of China
| | - Xuan Peng
- College of Information Science and Technology, Beijing University of Chemical Technology, Beijing, People’s Republic of China
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