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Ma X, Li Y, Du Y, Chen S, Bai Y, Li L, Qi C, Wu P, Zhang S. In-situ synthesis of ZIF-8 on magnetic pineapple leaf biochar as an efficient and reusable adsorbent for methylene blue removal from wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:24113-24128. [PMID: 38436853 DOI: 10.1007/s11356-024-32700-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/25/2024] [Indexed: 03/05/2024]
Abstract
The presence of organic dyes in aquatic systems poses a significant threat to ecosystems and human well-being. Due to recycling challenges, traditional commercial activated carbon is not cost-effective. To address this, an imidazolate acid zeolite framework-8 (ZIF-8)-modified magnetic adsorbent (ZMPLB-800) was synthesized through the in-situ formation of ZIF-8 and subsequent carbonization at 800 °C, using magnetic pineapple leaf biochar (MPLB) as a carrier. The porous structure of ZMPLB-800 facilitates the rapid passage of dye molecules, enhancing adsorption performance. ZMPLB-800 exhibited remarkable adsorption capacity for methylene blue (MB) across a pH range of 3-13, with a maximum adsorption capacity of 455.98 mg g-1. Adsorption kinetics and thermodynamics followed the pseudo-second-order kinetic model and Langmuir isotherm model. Mechanisms of MB adsorption included pore filling, hydrogen bonding, electrostatic interactions, π-π interactions, and complexation through surface functional groups. Additionally, ZMPLB-800 demonstrated excellent regeneration performance, recording a removal efficiency exceeding 87% even after five adsorption/desorption cycles. This study provides a novel strategy for treating dye wastewater with MOF composites, laying the foundation for waste biomass utilization.
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Affiliation(s)
- Xiaoxiao Ma
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China
| | - Yutong Li
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China
| | - Yile Du
- College of Liberal Arts & Sciences at Illinois, University of Illinois Urbana-Champaign, Champaign, IL, 61820, USA
| | - Shuangli Chen
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China
| | - Yunfan Bai
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China
| | - Lin Li
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China
| | - Chuhua Qi
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China
| | - Pingping Wu
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China
| | - Sijing Zhang
- School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, 13 Yanta Rd., Xi'an, 710055, China.
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Wiśniewska M, Pawlak N, Sternik D, Pietrzak R, Nowicki P. Production of Activated Carbons from Food/Storage Waste. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16041349. [PMID: 36836978 PMCID: PMC9962236 DOI: 10.3390/ma16041349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/27/2023] [Accepted: 02/02/2023] [Indexed: 05/09/2023]
Abstract
This paper deals with the adsorption of organic and inorganic pollutants on the surface of carbonaceous adsorbents prepared via the chemical activation of expired or broken food products-the solid residue of the "cola-type" drink as well as spoilt grains of white rice and buckwheat groats. The activation process was conducted in the microwave furnace with the use of two activating agents of different chemical nature-potassium carbonate and orthophosphoric acid. The activated carbons were characterized based on the results of elemental analysis, low-temperature nitrogen adsorption/desorption, Boehm titration, thermal analysis, and scanning electron microscopy. Additionally, the suitability of the materials prepared as the adsorbents of methylene blue and iodine from the aqueous solutions was estimated. The materials obtained via chemical activation with H3PO4 turned out to be much more effective in terms of both model pollutant adsorptions. The maximum sorption capacity toward iodine (1180 mg/g) was found for the white-rice-based activated carbon, whereas the most effective in the methylene blue removal (221.3 mg/g) was the sample obtained from the solid residue of the expired "cola-type" drink. For all carbonaceous materials, a better fit for the experimental adsorption data was obtained with the Langmuir isotherm model than the Freundlich one.
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Affiliation(s)
- Małgorzata Wiśniewska
- Department of Radiochemistry and Environmental Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland
- Correspondence: (M.W.); (P.N.)
| | - Natalia Pawlak
- Department of Applied Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Dariusz Sternik
- Department of Physical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland
| | - Robert Pietrzak
- Department of Applied Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Piotr Nowicki
- Department of Applied Chemistry, Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
- Correspondence: (M.W.); (P.N.)
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Liu J, Zhang K, Wang H, Lin L, Zhang J, Li P, Zhang Q, Shi J, Cui H. Advances in Micro-/Mesopore Regulation Methods for Plant-Derived Carbon Materials. Polymers (Basel) 2022; 14:polym14204261. [PMID: 36297839 PMCID: PMC9611847 DOI: 10.3390/polym14204261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/01/2022] [Accepted: 10/06/2022] [Indexed: 11/16/2022] Open
Abstract
In recent years, renewable and clean energy has become increasingly important due to energy shortage and environmental pollution. Selecting plants as the carbon precursors to replace costly non-renewable energy sources causing severe pollution is a good choice. In addition, owing to their diverse microstructure and the rich chemical composition, plant-based carbon materials are widely used in many fields. However, some of the plant-based carbon materials have the disadvantage of possessing a large percentage of macroporosity, limiting their functionality. In this paper, we first introduce two characteristics of plant-derived carbon materials: diverse microstructure and rich chemical composition. Then, we propose improvement measures to cope with a high proportion of macropores of plant-derived carbon materials. Emphatically, size regulation methods are summarized for micropores (KOH activation, foam activation, physical activation, freezing treatment, and fungal treatment) and mesopores (H3PO4 activation, enzymolysis, molten salt activation, and template method). Their advantages and disadvantages are also compared and analyzed. Finally, the paper makes suggestions on the pore structure improvement of plant-derived carbon materials.
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Affiliation(s)
- Jing Liu
- Key Laboratory of Wooden Materials Science and Engineering of Jilin Province, Beihua University, Jilin 132013, China
| | - Ke Zhang
- Key Laboratory of Wooden Materials Science and Engineering of Jilin Province, Beihua University, Jilin 132013, China
| | - Huiyan Wang
- Beijing Spacecraft Manufacturing Co., Ltd., Beijing 100094, China
| | - Lin Lin
- Key Laboratory of Wooden Materials Science and Engineering of Jilin Province, Beihua University, Jilin 132013, China
- Correspondence: (L.L.); (J.S.)
| | - Jian Zhang
- Key Laboratory of Wooden Materials Science and Engineering of Jilin Province, Beihua University, Jilin 132013, China
| | - Peng Li
- School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
| | - Qiang Zhang
- Key Laboratory of Wooden Materials Science and Engineering of Jilin Province, Beihua University, Jilin 132013, China
| | - Junyou Shi
- Key Laboratory of Wooden Materials Science and Engineering of Jilin Province, Beihua University, Jilin 132013, China
- Correspondence: (L.L.); (J.S.)
| | - Hang Cui
- National Demonstration Center for Experimental Physics Education, College of Physics, Jilin University, Changchun 130012, China
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Williams NE, Oba OA, Aydinlik NP. Modification, Production, and Methods of KOH‐Activated Carbon. CHEMBIOENG REVIEWS 2022. [DOI: 10.1002/cben.202100030] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Ndifreke Etuk Williams
- Cyprus International University Department of Basic Sciences and Humanities, Faculty of Arts and Science Mersin 10 99010 Lefkosa Turkey
| | - Oluwasuyi Ayobami Oba
- Cyprus International University Department of Basic Sciences and Humanities, Faculty of Arts and Science Mersin 10 99010 Lefkosa Turkey
| | - Nur Pasaoglulari Aydinlik
- Cyprus International University Department of Basic Sciences and Humanities, Faculty of Arts and Science Mersin 10 99010 Lefkosa Turkey
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Competitive adsorption of arsenic and mercury on nano-magnetic activated carbons derived from hazelnut shell. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-021-0903-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Enhancing adsorption efficiencies of organic molecules through covalently bonded structures of magnetic carbon nanoparticles. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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de Lima HHC, Llop MEG, Dos Santos Maniezzo R, Moisés MP, Janeiro V, Arroyo PA, Guilherme MR, Rinaldi AW. Enhanced removal of bisphenol A using pine-fruit shell-derived hydrochars: Adsorption mechanisms and reusability. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126167. [PMID: 34492943 DOI: 10.1016/j.jhazmat.2021.126167] [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: 12/15/2020] [Revised: 05/05/2021] [Accepted: 05/17/2021] [Indexed: 06/13/2023]
Abstract
We synthesized NaOH-activated hydrochars via hydrothermal carbonization (HTC) of Brazilian pine fruit shells at HTC residence times of 24, 48, and 72 h. The hydrochars were used as adsorbents to remove bisphenol A (BPA) from aqueous solutions. The surface area of the samples can reach up to 2220 m2 g-1, and the maximum adsorption of BPA onto the surfaces was achieved at a pH of 7.0 (708 mg g-1). Adsorption occurred mainly via monolayer formation with a low retention time of the adsorbate (τ) on the surfaces, indicating that the BPA molecules reached the already occupied active sites and returned after undergoing heat exchange (τ > 0). Adsorption is an endothermic spontaneous process that results in a balance between entropic and enthalpic contributions. In such a reaction, ΔG°< 0, even with ΔH°> 0, the process occurs with an important increase in the entropy. The desorption was more efficient with ethanol and methanol than with HCl, NaOH, and NaCl owing to the dipole-dipole forces between the adsorbate and the alcohols. Additionally, the low desorption efficiency using acid, base, and salts can be attributed to competitive effects between the desorption agents and the active sites of the adsorbents.
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Affiliation(s)
- Hugo Henrique Carline de Lima
- Rinaldi Research Group, Chemistry Department, State University of Maringá, 5790 Colombo Avenue, 87020-900 Maringá, PR, Brazil
| | - Maria Eugênia Grego Llop
- Rinaldi Research Group, Chemistry Department, State University of Maringá, 5790 Colombo Avenue, 87020-900 Maringá, PR, Brazil
| | - Rogério Dos Santos Maniezzo
- Rinaldi Research Group, Chemistry Department, State University of Maringá, 5790 Colombo Avenue, 87020-900 Maringá, PR, Brazil
| | - Murilo Pereira Moisés
- Rinaldi Research Group, Chemistry Department, State University of Maringá, 5790 Colombo Avenue, 87020-900 Maringá, PR, Brazil; Federal University of Technology - Paraná, 635 Marcilio Dias Street, Jardim Paraiso, Apucarana 86812460, PR, Brazil
| | - Vanderly Janeiro
- Statistic Department, State University of Maringá, 5790 Colombo Avenue, 87020-900 Maringá, PR, Brazil
| | - Pedro Augusto Arroyo
- Adsorption and ion exchange laboratory - Lati, Chemistry Engineering Department, State University of Maringá, 5790 Colombo Avenue,87020-900 Maringá, PR, Brazil
| | - Marcos Rogério Guilherme
- Rinaldi Research Group, Chemistry Department, State University of Maringá, 5790 Colombo Avenue, 87020-900 Maringá, PR, Brazil; Faculty of Engineering and Innovation Professional Technical - FEITEP, Av. Paranavaí, 1164, CEP - 87070-130, Parque Industrial Bandeirantes, Maringá, PR, Brazil
| | - Andrelson Wellington Rinaldi
- Rinaldi Research Group, Chemistry Department, State University of Maringá, 5790 Colombo Avenue, 87020-900 Maringá, PR, Brazil.
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High surface area and mesoporous activated carbon from KOH-activated dragon fruit peels for methylene blue dye adsorption: Optimization and mechanism study. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.09.070] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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9
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Qu G, Han Y, Qi J, Xing X, Hou M, Sun Y, Wang X, Sun G. Rapid iodine capture from radioactive wastewater by green and low-cost biomass waste derived porous silicon–carbon composite. RSC Adv 2021; 11:5268-5275. [PMID: 35424433 PMCID: PMC8694670 DOI: 10.1039/d0ra09723c] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/22/2021] [Indexed: 12/21/2022] Open
Abstract
The effective and safe capture and storage of radioactive iodine (129I or 131I) are of significant importance during nuclear waste storage and nuclear energy generation. Herein, a porous silicon–carbon (pSi–C) composite derived from paper mill sludge (PMS) is synthesized and used for rapid iodine capture. The influences of the activator type, the impregnation ratio of the paper mill sludge to the activator, carbonization temperature, and carbonization time on the properties of the pSi–C composite are investigated. The pSi–C composite produced in the presence of ZnCl2 as the activator and at an impregnation ratio of 1 : 1, a carbonization temperature of 550 °C, and a carbonization time of 90 min has a surface area of 762.13 m2 g−1. The as-synthesized pSi–C composite exhibits promising iodine capture performance in terms of superior iodine adsorption capacity (qt) of around 250 mg g−1 and rapid equilibrium adsorption with in 15 min. The devised method is environmentally friendly and inexpensive and can easily be employed for the large-scale production of porous silicon-activated carbon composites with excellent iodine capture and storage from iodine-contaminated water. The effective and safe capture and storage of radioactive iodine (129I or 131I) are of significant importance during nuclear waste storage and nuclear energy generation.![]()
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Affiliation(s)
- Guiyang Qu
- Liaoning Key Laboratory of Pulp and Papermaking Engineering
- Dalian Polytechnic University
- Dalian
- China
| | - Ying Han
- Liaoning Key Laboratory of Pulp and Papermaking Engineering
- Dalian Polytechnic University
- Dalian
- China
| | - Junjun Qi
- Liaoning Key Laboratory of Pulp and Papermaking Engineering
- Dalian Polytechnic University
- Dalian
- China
- China National Paper-Industry Investment Corp
| | - Xinyue Xing
- Liaoning Key Laboratory of Pulp and Papermaking Engineering
- Dalian Polytechnic University
- Dalian
- China
| | - Minjie Hou
- Liaoning Key Laboratory of Pulp and Papermaking Engineering
- Dalian Polytechnic University
- Dalian
- China
| | - Yang Sun
- Department of Chemistry
- Faculty of Engineering
- Gunma University
- Kiryu
- Japan
| | - Xing Wang
- Liaoning Key Laboratory of Pulp and Papermaking Engineering
- Dalian Polytechnic University
- Dalian
- China
| | - Guangwei Sun
- Liaoning Key Laboratory of Pulp and Papermaking Engineering
- Dalian Polytechnic University
- Dalian
- China
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10
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Process conditions optimization for the fabrication of highly porous activated carbon from date palm bark wastes for removing pollutants from water. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2020.09.051] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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An Z, Kong S, Zhang W, Yuan M, An Z, Chen D. Synthesis and Adsorption Performance of a Hierarchical Micro-Mesoporous Carbon for Toluene Removal under Ambient Conditions. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E716. [PMID: 32033371 PMCID: PMC7040770 DOI: 10.3390/ma13030716] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/01/2020] [Accepted: 02/03/2020] [Indexed: 11/25/2022]
Abstract
Ordered mesoporous carbons (OMCs) were synthesized in this study through a soft template method and then activated by employing different mass ratios of KOH/OMCs to obtain KOH-activated ordered mesoporous carbons (KOMCs) with hierarchical pore structures. To verify the adsorption capacity, the KOMCs have been subjected to toluene emission-reduction experiments. The KOMCs were characterized by TEM, XRD, N2 adsorption-desorption isotherms, and Raman spectroscopy. The pore structure of OMCs was found to be effectively optimized by the activation with KOH, with the BET-area and total pore volume values reaching as high as 2661 m2 g-1 and 2.14 cm3 g-1 respectively. Then, the dynamic adsorption capacity of toluene on KOMCs was investigated via breakthrough curves, which can be well described by the Yoon and Nelson (Y-N) model. The dynamic adsorption capacities of toluene exhibit the following order: OMC < KOMC-1 < KOMC-5 < KOMC-3. The sample activated by KOH/OMC with a mass ratio of 3:1 (KOMC-3) demonstrated the highest toluene adsorption capacity of 355.67 mg g-1, three times higher in comparison with the untreated carbon (104.61 mg g-1). The modified hierarchical porous carbons also exhibited good recyclability. The KOMCs with rich pore structure, high toluene adsorption capacity, and superior reusability thus display a huge potential for volatile organic compound (VOC) elimination.
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Affiliation(s)
- Zhaohui An
- School of Chemical and Environmental Engineering, Shanghai Institute of Tech nology, Shanghai 201418, China
| | - Shulin Kong
- School of Chemical and Environmental Engineering, Shanghai Institute of Tech nology, Shanghai 201418, China
| | - Wenwen Zhang
- College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
| | - Ming Yuan
- School of Chemical and Environmental Engineering, Shanghai Institute of Tech nology, Shanghai 201418, China
| | - Zhihao An
- School of Chemical and Environmental Engineering, Shanghai Institute of Tech nology, Shanghai 201418, China
| | - Donghui Chen
- School of Chemical and Environmental Engineering, Shanghai Institute of Tech nology, Shanghai 201418, China
- Institute of Foreign Languages, Shanghai DianJi University, Shanghai 201306, China
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13
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Liu S, Pan M, Feng Z, Qin Y, Wang Y, Tan L, Sun T. Ultra-high adsorption of tetracycline antibiotics on garlic skin-derived porous biomass carbon with high surface area. NEW J CHEM 2020. [DOI: 10.1039/c9nj05396d] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A porous carbon material with ultra-high specific surface area was prepared from waste garlic skin, and exhibited excellent adsorption properties to TCs in a water environment.
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Affiliation(s)
- Shujian Liu
- College of Sciences
- Northeastern University
- Shenyang
- P. R. China
| | - Mingdi Pan
- Chaoyang Inspection
- Examination & Certification Centre
- Chaoyang
- P. R. China
| | - Zhongmin Feng
- College of Sciences
- Northeastern University
- Shenyang
- P. R. China
| | - Yangchun Qin
- College of Sciences
- Northeastern University
- Shenyang
- P. R. China
| | - Yun Wang
- College of Sciences
- Northeastern University
- Shenyang
- P. R. China
| | - Lili Tan
- Shaanxi Joint Laboratory of Graphene Northwestern Polytechnical University
- Xi’an
- P. R. China
| | - Ting Sun
- College of Sciences
- Northeastern University
- Shenyang
- P. R. China
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14
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Magnetic Behavior of Carbon Materials Made from Biomass by Fe-Assisted Hydrothermal Carbonization. Molecules 2019; 24:molecules24213996. [PMID: 31694183 PMCID: PMC6864883 DOI: 10.3390/molecules24213996] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 10/29/2019] [Accepted: 11/03/2019] [Indexed: 01/04/2023] Open
Abstract
Biomass magnetic materials were synthesized by several hydrothermal carbonization methods, by which iron was provided in different ways: as FeCl3 prior to or during hydrothermal carbonization, as pure Fe particles, or as magnetic ferrofluid, followed or not by pyrolysis processes. The materials were thoughtfully characterized in terms of elemental composition, thermal degradation, porosity (N2 adsorption, SEM micrography), surface chemistry (FTIR spectroscopy, XRD diffraction), and magnetization curves on a self-made installation. The results indicated that the process design can significantly improve the structure and chemistry of the material, as well as the magnetization effect induced on the adsorbent. Fe as FeCl3 was more interesting in regards to the development of porosity, mainly creating micropores, although it did not provide magnetism to the material unless a further pyrolysis was applied. Thermal treatment at 600 °C did not only increase the BET-specific surface (SBET) (262 m2 g−1) of the hydrochar, but also involved the transformation of Fe into magnetite, providing magnetic behavior of the hydrochar. Increasing pyrolyisis temperature to 800 °C even enhanced a better development of porosity (SBET of 424 m2 g−1) and also increased the specific magnetic susceptibility of the hydrochar as a result of the further transition of Fe into wustite and hydroxi-ferrite.
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Astuti W, Sulistyaningsih T, Kusumastuti E, Thomas GYRS, Kusnadi RY. Thermal conversion of pineapple crown leaf waste to magnetized activated carbon for dye removal. BIORESOURCE TECHNOLOGY 2019; 287:121426. [PMID: 31103938 DOI: 10.1016/j.biortech.2019.121426] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 04/30/2019] [Accepted: 05/06/2019] [Indexed: 05/15/2023]
Abstract
Pineapple crown leaf was successfully converted to the magnetized activated carbon (MAC) as an attractive solution to overcome separation problems. The activated carbon (AC) was produced by an innovative method combining KOH activation and microwave heating while the magnetization process was prepared by a co-precipitation method. In this sense, the activation stage was studied at different impregnation ratio. The resulted magnetic adsorbent was further tested its feasibility for methyl violet dye removal. The result shows that MAC consists of both micropores and mesopores with more oxygen-containing functional groups, indicating it can be used to remove dye from contaminated water. The increase of impregnation ratio led to an increase in the MAC porosity and a decrease in the magnetic property. The adsorption behavior of methyl violet dye onto MAC was well described by the Redlich-Peterson isotherm model.
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Affiliation(s)
- Widi Astuti
- Chemical Engineering Department, Universitas Negeri Semarang, Semarang 50229, Indonesia.
| | | | - Ella Kusumastuti
- Chemistry Department, Universitas Negeri Semarang, Semarang 50229, Indonesia
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