1
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Romita R, Rizzi V, Gubitosa J, Gabaldón JA, Fortea MI, Gómez-Morte T, Gómez-López VM, Fini P, Cosma P. Cyclodextrin polymers and salts: An Eco-Friendly combination to modulate the removal of sulfamethoxazole from water and its release. CHEMOSPHERE 2021; 283:131238. [PMID: 34182638 DOI: 10.1016/j.chemosphere.2021.131238] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/19/2021] [Accepted: 06/13/2021] [Indexed: 06/13/2023]
Abstract
This study is aimed to validate water-insoluble cyclodextrin-epichlorohydrin polymer (β-EPI) use to remove, by adsorption, sulfamethoxazole (SMX) from water and then release it via an environmentally friendly treatment so that the adsorbent can be recycled according to one of the objectives of the European Project Life "Clean up" (LIFE 16 ENV/ES/000169). SMX adsorption experiments on β-EPI polymer in-batch were performed, varying different experimental parameters of the process, such as contact time, pH values, and so on. The adsorption process, exothermic and driven by enthalpy, occurs both through the formation of inclusion and association complexes, involves mainly hydrophobic and hydrogen bonds, has a rate-controlling step depending on both pollutant concentration and adsorbent dose and can be described by the Freundlich and Dubinin-Radushkevich models which confirm the polymer surface heterogeneity and the physical nature of the adsorption. The presence of salts gives rise to a general decrease in the SMX sorption, mainly in the case of bromide, which was used to promote the SMX desorption and regenerate the adsorbent. The overall results indicate that β-EPI polymer is not only capable of removing SMX by adsorption with short contact times and a qmax = 10 mg/g but it is also easily regenerated using a 0.5 M solution of sodium bromide without any loss in the adsorption performance and with obvious economic and environmental advantages. The polymer as synthesized, with SMX adsorbed and regenerated was characterized by FT-IR, SEM and DSC.
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Affiliation(s)
- Roberto Romita
- Università degli Studi di Bari "Aldo Moro'', Dip. Chimica, Via Orabona, 4, 70126, Bari, Italy
| | - Vito Rizzi
- Università degli Studi di Bari "Aldo Moro'', Dip. Chimica, Via Orabona, 4, 70126, Bari, Italy
| | - Jennifer Gubitosa
- Università degli Studi di Bari "Aldo Moro'', Dip. Chimica, Via Orabona, 4, 70126, Bari, Italy
| | - José Antonio Gabaldón
- Molecular Recognition and Encapsulation Research Group (REM), Health Sciences Department, Universidad Católica de Murcia (UCAM), Campus de los Jerónimos 135, Guadalupe, 30107, Spain
| | - María Isabel Fortea
- Molecular Recognition and Encapsulation Research Group (REM), Health Sciences Department, Universidad Católica de Murcia (UCAM), Campus de los Jerónimos 135, Guadalupe, 30107, Spain
| | - Teresa Gómez-Morte
- Molecular Recognition and Encapsulation Research Group (REM), Health Sciences Department, Universidad Católica de Murcia (UCAM), Campus de los Jerónimos 135, Guadalupe, 30107, Spain
| | - V M Gómez-López
- Molecular Recognition and Encapsulation Research Group (REM), Health Sciences Department, Universidad Católica de Murcia (UCAM), Campus de los Jerónimos 135, Guadalupe, 30107, Spain
| | - Paola Fini
- Consiglio Nazionale delle Ricerche CNR-IPCF, UOS Bari, Via Orabona, 4, 70126, Bari, Italy.
| | - Pinalysa Cosma
- Università degli Studi di Bari "Aldo Moro'', Dip. Chimica, Via Orabona, 4, 70126, Bari, Italy
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2
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Mohseni M, Utsch N, Marcks C, Demeestere K, Du Laing G, Yüce S, Keller RG, Wessling M. Freestanding Nitrogen-Doped Carbons with Hierarchical Porosity for Environmental Applications: A Green Templating Route with Bio-Based Precursors. GLOBAL CHALLENGES (HOBOKEN, NJ) 2021; 5:2100062. [PMID: 34754509 PMCID: PMC8562066 DOI: 10.1002/gch2.202100062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Powdery hierarchical porous carbons serve as cost-effective, functional materials in various fields, namely energy storage, heterogeneous catalysis, electrochemistry, and water/wastewater treatment. Such powdered activated carbons (PAC) limit new module designs and require further preparation steps, for example, adding polymeric binders, to be shaped into a standalone geometry. Polymeric binders, however, can block PACs' catalytic and active sites and, more importantly, pose the risk of secondary pollution for environmental purposes, especially in the context of clean water supply. This study introduces a novel synthesis method for fabricating freestanding nitrogen-doped carbons with hierarchical porosity using chitosan and sucrose as green precursors. Chitosan supplies nitrogen and acts as a backbone, giving a freestanding geometry to the final product, and sucrose is a carbon-rich precursor. The proposed method employs ice- and hard-templating for macropores and mesopores and combines carbonization and activation steps with no required activating agent. Final freestanding carbons function as adsorbents for removing persistent pollutants, as binder-free electrodes with high specific surface area and capacitive current, and as tubular gas diffusion electrodes for oxygen reduction reactions. These freestanding carbons enable new module designs and can be scaled-up by numbering-up, serving as bio-based functional materials for a wide range of applications involving porous heteroatom-doped carbons.
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Affiliation(s)
- Mojtaba Mohseni
- Aachener Verfahrenstechnik ‐ Chemical Process EngineeringRWTH Aachen UniversityForckenbeckstr. 5152074AachenGermany
- Department of Green Chemistry and TechnologyGhent UniversityCoupure Links 653Ghent9000Belgium
| | - Nikolai Utsch
- Aachener Verfahrenstechnik ‐ Chemical Process EngineeringRWTH Aachen UniversityForckenbeckstr. 5152074AachenGermany
| | - Christian Marcks
- Aachener Verfahrenstechnik ‐ Chemical Process EngineeringRWTH Aachen UniversityForckenbeckstr. 5152074AachenGermany
| | - Kristof Demeestere
- Department of Green Chemistry and TechnologyGhent UniversityCoupure Links 653Ghent9000Belgium
| | - Gijs Du Laing
- Department of Green Chemistry and TechnologyGhent UniversityCoupure Links 653Ghent9000Belgium
| | - Süleyman Yüce
- Aachener Verfahrenstechnik ‐ Chemical Process EngineeringRWTH Aachen UniversityForckenbeckstr. 5152074AachenGermany
| | - Robert G. Keller
- Aachener Verfahrenstechnik ‐ Chemical Process EngineeringRWTH Aachen UniversityForckenbeckstr. 5152074AachenGermany
| | - Matthias Wessling
- Aachener Verfahrenstechnik ‐ Chemical Process EngineeringRWTH Aachen UniversityForckenbeckstr. 5152074AachenGermany
- DWI ‐ Leibniz Institute for Interactive MaterialsForckenbeckstr. 5052074AachenGermany
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3
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Wang T, Cheng Z, Liu Y, Tang W, Fang T, Xing B. Mechanistic understanding of highly selective adsorption of bisphenols on microporous-dominated nitrogen-doped framework carbon. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 762:143115. [PMID: 33127136 DOI: 10.1016/j.scitotenv.2020.143115] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 10/11/2020] [Accepted: 10/12/2020] [Indexed: 06/11/2023]
Abstract
Producing a desirable adsorbent for removing endocrine disrupting compounds (EDCs) from aqueous solutions remains a major challenge. In this work, microporous-dominated nitrogen-doped framework carbons (MNFCs, s means the calcination temperature) with high specific surface area, ultra-microporous structure, and high nitrogen-doping can be obtained by a direct calcination of ethylene diamine tetraacetic acid tetrasodium (EDTA-4Na) without aid of any catalyst and nitrogen source. MNFCs were applied adsorbents to remove bisphenols from aqueous solution. Batch experiments showed MNFC-750 had a large adsorption capacity for bisphenols from aqueous solutions (409 mg/g for bisphenol A, 364 mg/g for bisphenol F, and 521 mg/g for bisphenol S) along with short equilibrium time (30 min), and good stability and reusability. Using multiple characterizations and comparative experiments along with theoretical calculations, we discovered that: (1) nitrogen-doping can significantly boost the adsorption capacity; (2) adsorption sites are mainly the pyridinic-N instead of pyrrolic-N and graphitic-N; and (3) the adsorption mechanisms were mainly driven by Lewis acid-base interaction, hydrophobic interaction, π-π interaction and hydrogen bond interaction. These findings indicate that MNFCs present a promising potential for practical applications and shed light on the rational design of nitrogen doped carbon-based adsorbents for efficient pollutant removal.
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Affiliation(s)
- Tao Wang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhuang Cheng
- School of Materials and Environmental Engineering, Chizhou University, Chizhou 247000, China
| | - Yonghong Liu
- College of Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Tang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Tao Fang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States
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Lartey-Young G, Ma L. Remediation with Semicoke-Preparation, Characterization, and Adsorption Application. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E4334. [PMID: 33003433 PMCID: PMC7579581 DOI: 10.3390/ma13194334] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/23/2020] [Accepted: 09/24/2020] [Indexed: 12/02/2022]
Abstract
Development of low-cost contaminant sorbents from industrial waste is now an essential aspect of the circular economy since their disposal continues to threaten ecological integrity. Semicoke (SC), a by-product generated in large quantities and described as solid waste from gasification of low-rank coal (LRC), is gaining popularity in line with its reuse capacity in the energy industry but is less explored as a contaminant adsorbent despite its physical and elemental carbon properties. This paper summarizes recent information on SC, sources and production, adsorption mechanism of polluting contaminants, and summarizes regeneration methods capable of yielding sustainability for the material reuse.
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Affiliation(s)
- George Lartey-Young
- College of Environmental Science and Engineering, Tongji University, 1239, Siping Road, Shanghai 200092, China;
| | - Limin Ma
- College of Environmental Science and Engineering, Tongji University, 1239, Siping Road, Shanghai 200092, China;
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
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Du S, Wu Y, Wang X, Xia Q, Xiao J, Zhou X, Li Z. Facile synthesis of ultramicroporous carbon adsorbents with ultra‐high
CH
4
uptake by in situ ionic activation. AIChE J 2020. [DOI: 10.1002/aic.16231] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Shengjun Du
- School of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou PR China
| | - Ying Wu
- School of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou PR China
| | - Xingjie Wang
- School of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou PR China
| | - Qibin Xia
- The Key Laboratory of Enhanced Heat Transfer and Energy ConservationMinistry of Education Guangzhou PR China
| | - Jing Xiao
- The Key Laboratory of Enhanced Heat Transfer and Energy ConservationMinistry of Education Guangzhou PR China
| | - Xin Zhou
- The Key Laboratory of Enhanced Heat Transfer and Energy ConservationMinistry of Education Guangzhou PR China
| | - Zhong Li
- School of Chemistry and Chemical EngineeringSouth China University of Technology Guangzhou PR China
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