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Qiu S, Yuan M, Li M, Han W, Zhang L, Zhao D, Li X, Zhang K, Wang F. Phosphate adsorption on LDHs-biochar composite: Double-layer model for quantifying the contribution of ion exchange and ligand exchange. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:93986-93997. [PMID: 37518842 DOI: 10.1007/s11356-023-28958-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 07/20/2023] [Indexed: 08/01/2023]
Abstract
The adsorption performance of layered double hydroxides (LDHs) is limited owing to self-aggregation. To avoid this and effectively control the eutrophication of water bodies, biochar (BC) was synthesized, herein, by pyrolyzing waste sheep manure at 500°C, and Ca-Al-LDHs were loaded on the surface via a coprecipitation method to obtain Ca-Al-LDHs-BC(CA) composites with varying LDH contents. The fitted maximum adsorption capacities of the CA-5%, CA-10%, CA-15%, and CA-20% samples (corresponding to samples with 5%, 10%, 15%, and 20% LDHs, respectively) were 10.21, 16.14, 22.40, and 28.47 mg g-1, which were (when converted into metal proportions) 1.48, 1.23, 1.15, and 1.13 times of that of single hydrotalcite, respectively. The double-layer model was fitted using the Levenberg-Marquardt iterative algorithm, which when combined with the characterization results, confirmed that the adsorption of phosphate ions by CA-BC occurred via the double-layer adsorption mechanism. Two types of direct adsorption were observed: ion exchange, which resulted in first-layer adsorption, and ligand exchange, which resulted in second-layer adsorption, with first-layer adsorption accounting for a higher proportion. This double-layer adsorption mechanism showed that LDHs-BC could achieve higher ligand exchange performance compared to that achieved using only LDHs.
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Affiliation(s)
- Shangkai Qiu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs (Dali Original Seed Farm), Dali, 671004, China
| | - Mingyao Yuan
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs (Dali Original Seed Farm), Dali, 671004, China
| | - Mengmeng Li
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs (Dali Original Seed Farm), Dali, 671004, China
| | - Wenjia Han
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, 250353, People's Republic of China
| | - Lisheng Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs (Dali Original Seed Farm), Dali, 671004, China
| | - Di Zhao
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs (Dali Original Seed Farm), Dali, 671004, China
| | - Xia Li
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, 250353, People's Republic of China
| | - Keqiang Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs (Dali Original Seed Farm), Dali, 671004, China
| | - Feng Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China.
- Dali Comprehensive Experimental Station of Environmental Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs (Dali Original Seed Farm), Dali, 671004, China.
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Sellaoui L, Said S, Bouzidi M, Alshammari AS, Khan ZR, Gandouzi M, Schnorr C, Dotto GL, Silva L, Streit AF, Lamine AB, Erto A. Highlighting the adsorption mechanism of dyes onto activated carbon derived from sludge by theoretical physical analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:15789-15796. [PMID: 36173520 DOI: 10.1007/s11356-022-23287-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
An activated carbon (AC) deriving from sludge is used in this research for the adsorption of two water pollutants, namely Reactive Black 5 (RB5) and Green Alizarin (GA) dyes, at different temperatures. The adsorption capacities varied from 277.2 to 312.69 mg/g for GA and from 225.82 to 256.02 mg/g for RB5. Comparatively, this adsorbent presents good performances in removing these dyes from wastewater. The application of physical models to adsorption experiments is advantageous to provide new insights into the dyes' adsorption mechanism. A dedicated physical adsorption model suggests that RB5 and GA dyes are adsorbed in a monolayer. Moreover, the orientation of RB5 and GA dyes on AC resulted in an angled position, determining a multi-molecular process. In addition, both dyes are adsorbed by the occurrence of an aggregation process, forming a dimer. The impact of temperature can be also interpreted, allowing concluding that it plays a relevant role in removing these dyes. The calculation and interpretation of adsorption energies show that the dyes are removed via an endothermic process, and physical forces are involved.
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Affiliation(s)
- Lotfi Sellaoui
- Laboratory of Quantum and Statistical Physics, Monastir University, LR18ES18, Monastir, Tunisia.
| | - Sarra Said
- Textile Materials and Processes Research Unit (MPTEX), National Engineering School of Monastir, University of Monastir, Av. Ibn El Jazzar 5019, Monastir, Tunisia
| | - Mohamed Bouzidi
- Department of Physics, College of Science, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia
- Laboratoire de Recherche Sur Les Hétéro-Epitaxies Et Applications (LRHEA), Faculté Des Sciences de Monastir, Université de Monastir, 5000, Monastir, Tunisia
| | | | - Ziaul Raza Khan
- Department of Physics, College of Science, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia
| | - Mohamed Gandouzi
- Department of Physics, College of Science, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia
| | - Carlos Schnorr
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | - Guilherme Luiz Dotto
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | - Luis Silva
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | - Angélica Fátima Streit
- Research Group On Adsorptive and Catalytic Process Engineering (ENGEPAC), Federal University of Santa Maria, Av. Roraima, 1000-7, Santa Maria, RS, 97105-900, Brazil
| | | | - Alessandro Erto
- Dipartimento Di Ingegneria Chimica, Dei Materiali E Della Produzione Industriale, Università Di Napoli Federico II, 80125, Naples, Italy
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Pauletto PS, Moreno-Pérez J, Hernández-Hernández LE, Bonilla-Petriciolet A, Dotto GL, Salau NPG. Novel biochar and hydrochar for the adsorption of 2-nitrophenol from aqueous solutions: An approach using the PVSDM model. CHEMOSPHERE 2021; 269:128748. [PMID: 33139043 DOI: 10.1016/j.chemosphere.2020.128748] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/13/2020] [Accepted: 10/23/2020] [Indexed: 06/11/2023]
Abstract
Two new adsorbents, namely avocado-based hydrochar and LDH/bone-based biochar, were developed, characterized, and applied for adsorbing 2-nitrophenol. The pore volume and surface diffusion model (PVSDM) was numerically solved for different geometries and applied to interpret the adsorption decay curves. Both adsorbents presented interesting textural and physicochemical characteristics, which achieved maximum adsorption capacities of 761 mg/g for biochar and 562 mg/g for hydrochar. The adsorption equilibrium data were well fitted by Henry isotherm. Besides, thermodynamic investigation revealed endothermic adsorption with the occurrence of electrostatic interactions. PVSDM predicted the adsorption decay curves for different adsorbent geometries at different initial concentrations of 2-nitrophenol. The surface diffusion was the main intraparticle mass transport mechanism. Furthermore, the external mass transfer and surface diffusion coefficients increased with the increase of 2-nitrophenol concentration.
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Affiliation(s)
- P S Pauletto
- Chemical Engineering Department, Federal University of Santa Maria-UFSM, 1000, Roraima Avenue, 97105-900, Santa Maria, RS, Brazil.
| | - J Moreno-Pérez
- Instituto Tecnológico de Aguascalientes, Aguascalientes, 20256, Mexico.
| | | | | | - G L Dotto
- Chemical Engineering Department, Federal University of Santa Maria-UFSM, 1000, Roraima Avenue, 97105-900, Santa Maria, RS, Brazil.
| | - N P G Salau
- Chemical Engineering Department, Federal University of Santa Maria-UFSM, 1000, Roraima Avenue, 97105-900, Santa Maria, RS, Brazil.
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