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Hu Q, Lan R, He L, Liu H, Pei X. A critical review of adsorption isotherm models for aqueous contaminants: Curve characteristics, site energy distribution and common controversies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 329:117104. [PMID: 36603322 DOI: 10.1016/j.jenvman.2022.117104] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
The quantitative description of the equilibrium data by the isotherm models is an indispensable link in adsorption studies. The previous review papers focus on the underlying assumptions, fitting methods, error functions and practical applications of the isotherm models, usually ignoring their curve characteristics, selection criteria and common controversies. The main contents of this review include: (i) effect of the model parameters on the isotherm curves; (ii) determination of the site energy distribution; (iii) selection criteria of the isotherm models; and (iv) elimination of some common controversies. It is of great significance to reveal the curve characteristics for selecting a proper isotherm model. The site energy distribution is conducive to understanding the physicochemical properties of the adsorbent surface. The complete isotherm is recommended to be correlated with the experimental data. The model parameter qmax should be cautiously adopted for comparison of the adsorbent performance. The residual plot can be used to diagnose the fitting quality of the isotherm models further. This review also addresses some common mistakes and controversies and thereby avoids their propagation in future publications.
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Affiliation(s)
- Qili Hu
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, China; College of Ecology and E nvironment, Chengdu University of Technology, Chengdu, 610059, China.
| | - Rui Lan
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, China; College of Ecology and E nvironment, Chengdu University of Technology, Chengdu, 610059, China
| | - Liru He
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, China; College of Ecology and E nvironment, Chengdu University of Technology, Chengdu, 610059, China
| | - Hengyuan Liu
- College of Chemistry and Life Sciences, Chifeng University, Chifeng, 024000, China
| | - Xiangjun Pei
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, China; College of Ecology and E nvironment, Chengdu University of Technology, Chengdu, 610059, China; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China.
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Hu J, Liu F, Shan Y, Huang Z, Gao J, Jiao W. Enhanced Adsorption of Sulfonamides by Attapulgite-Doped Biochar Prepared with Calcination. Molecules 2022; 27:8076. [PMID: 36432176 PMCID: PMC9698770 DOI: 10.3390/molecules27228076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/18/2022] [Accepted: 11/18/2022] [Indexed: 11/22/2022] Open
Abstract
The extensive use of sulfonamides seriously threatens the safety and stability of the ecological environment. Developing green inexpensive and effective adsorbents is critically needed for the elimination of sulfonamides from wastewater. The non-modified biochar exhibited limited adsorption capacity for sulfonamides. In this study, the attapulgite-doped biochar adsorbent (ATP/BC) was produced from attapulgite and rice straw by calcination. Compared with non-modified biochar, the specific surface area of ATP/BC increased by 73.53−131.26%, and the average pore width of ATP/BC decreased 1.77−3.60 nm. The removal rates of sulfadiazine and sulfamethazine by ATP/BC were 98.63% and 98.24%, respectively, at the mass ratio of ATP to rice straw = 1:10, time = 4 h, dosage = 2 g∙L−1, pH = 5, initial concentration = 1 mg∙L−1, and temperature = 20 °C. A pseudo-second-order kinetic model (R2 = 0.99) and the Freundlich isothermal model (R2 = 0.99) well described the process of sulfonamide adsorption on ATP/BC. Thermodynamic calculations showed that the adsorption behavior of sulfonamides on the ATP/BC was an endothermic (ΔH > 0), random (ΔS > 0), spontaneous reaction (ΔG < 0) that was dominated by chemisorption (−20 kJ∙mol−1 > ΔG). The potential adsorption mechanisms include electrostatic interaction, hydrogen bonding, π−π interaction, and Lewis acid−base interactions. This study provides an optional material to treat sulfonamides in wastewater and groundwater.
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Affiliation(s)
- Jianqiao Hu
- College of Water Conservancy and Civil Engineering, Zhengzhou University, Zhengzhou 450066, China
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100086, China
| | - Feng Liu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100086, China
| | - Yongping Shan
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100086, China
| | - Zhenzhen Huang
- College of Ecology and Environment, Zhengzhou University, Zhengzhou 450066, China
| | - Jingqing Gao
- College of Ecology and Environment, Zhengzhou University, Zhengzhou 450066, China
| | - Wentao Jiao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100086, China
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Zhang J, Zhang N, Tack FMG, Sato S, Alessi DS, Oleszczuk P, Wang H, Wang X, Wang S. Modification of ordered mesoporous carbon for removal of environmental contaminants from aqueous phase: A review. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126266. [PMID: 34130163 DOI: 10.1016/j.jhazmat.2021.126266] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/19/2021] [Accepted: 05/28/2021] [Indexed: 06/12/2023]
Abstract
Contamination of water bodies by potentially toxic elements and organic pollutants has aroused extensive concerns worldwide. Thus it is significant to develop effective adsorbents for removing these contaminants. As a new member of carbonaceous material families (activated carbon, biochar, and graphene), ordered mesoporous carbon (OMC) with larger specific surface area, ordered pore structure, and higher pore volume are being evaluated for their use in contaminant removal. In this paper, modification techniques of OMC were systematically reviewed for the first time. These include nonmetallic doping modification (nitrogen, sulfur, and boron) and the impregnation of nano-metals and metal oxides (iron, copper, cobalt, nickel, magnesium, and rare earth element). Reaction conditions (solution pH, reaction temperature, sorbent dosage, and contact time) are of critical importance for the removal performance of contaminants onto OMC. In addition, the pristine and modified OMC have been investigated for the removal of a range of contaminants, including cationic/anionic toxic elements and organic contaminants (synthetic dye, phenol, and others), and involving different and specific mechanisms of interaction with contaminants. The future research directions of the application of pristine and modified OMC were proposed. Overall, this review can provide sights into the modification techniques of OMC for removal of environmental contaminants.
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Affiliation(s)
- Jian Zhang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
| | - Ni Zhang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou 225127, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, China
| | - Filip M G Tack
- Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
| | - Shinjiro Sato
- Department of Science & Engineering for Sustainable Innovation, Soka University, Hachiojishi, Tokyo 192-8577, Japan
| | - Daniel S Alessi
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
| | - Patryk Oleszczuk
- Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, 3 Maria Curie-Skłodowska Square, 20-031 Lublin, Poland
| | - Hailong Wang
- Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China
| | - Xiaozhi Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou 225127, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, China
| | - Shengsen Wang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou 225127, Jiangsu, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, China.
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Zhang Q, Li J, Lin Q, Fang C. A stiff ZnO/carbon foam composite with second-level macroporous structure filled ZnO particles for heavy metal ions removal. ENVIRONMENTAL RESEARCH 2020; 188:109698. [PMID: 32504849 DOI: 10.1016/j.envres.2020.109698] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 05/16/2020] [Accepted: 05/17/2020] [Indexed: 06/11/2023]
Abstract
A stiff zinc oxide/carbon foam (ZnO/CF) composite as a desirable adsorbent for heavy metal ions was innovatively designed and fabricated by loading ZnO particles into a carbon foam with capsule-like second-level macropores. The features of the resulting composite were characterized by FESEM, XRD, BET, FTIR, and XPS. The effects of adsorption parameters on the Pb(II), Cr(III), and Cu(II) ions removal were studied through batch experiments. Results show that the ZnO/CF composite possesses a second-level macroporous structure filled ZnO particles, which has both mesoporous structure and Zn-O-C bond with the strongly synergistic effect. And meanwhile, it has a relatively high compression strength of 2.18 MPa at a density of 0.18 g cm-3. The experimental maximum adsorption capacities for Pb(II), Cr(III), and Cu(II) ions reach 170.85 mg g-1, 168.74 mg g-1, and 104.61 mg g-1 with relatively high partition coefficients of 5.803 mg g-1 μM-1, 1.169 mg g-1 μM-1, and 0.648 mg g-1 μM-1, respectively. The experimental data are in accordance with Langmuir isotherm and pseudo-second-order kinetic model. Moreover, the composite still exhibits a good adsorption performance even after five cycles.
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Affiliation(s)
- Qiyun Zhang
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, PR China
| | - Jiaqi Li
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, PR China
| | - Qilang Lin
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, PR China.
| | - Changqing Fang
- Faculty of Printing, Packing Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an, 710048, PR China.
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Keshavarz M, Foroutan R, Papari F, Bulgariu L, Esmaeili H. Synthesis of CaO/Fe2O3 nanocomposite as an efficient nanoadsorbent for the treatment of wastewater containing Cr (III). SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1778727] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Maryam Keshavarz
- Department of Chemical Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran
| | - Rauf Foroutan
- Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran
| | - Fatemeh Papari
- Young Researchers and Elite Club, Bushehr Branch, Islamic Azad University, Bushehr, Iran
| | - Laura Bulgariu
- Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection “Cristofor Simionescu”, “Cristofor Simionescu” Faculty of Technical University Gheorghe Asachi of Iasi, Iaşi, Romania
| | - Hossein Esmaeili
- Department of Chemical Engineering, Bushehr Branch, Islamic Azad University, Bushehr, Iran
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Nassar MY, Ahmed IS, Raya MA. A facile and tunable approach for synthesis of pure silica nanostructures from rice husk for the removal of ciprofloxacin drug from polluted aqueous solutions. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.017] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Li B, Li K. Effect of nitric acid pre-oxidation concentration on pore structure and nitrogen/oxygen active decoration sites of ethylenediamine -modified biochar for mercury(II) adsorption and the possible mechanism. CHEMOSPHERE 2019; 220:28-39. [PMID: 30579171 DOI: 10.1016/j.chemosphere.2018.12.099] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 12/09/2018] [Accepted: 12/12/2018] [Indexed: 06/09/2023]
Abstract
Controlling of pre-oxidation conditions can effectively enhance the aimed active functional groups via promoting the oxidation and grafting reaction on biochar's surface. Here, the effect of different nitric acid pre-oxidation concentration (NAPOC) was investigated on the type and content of active oxygen-containing functional sites during the pre-oxidation stage, as well as the active nitrogen-containing binding sites for the following grafting process. And the possible reaction mechanisms for introducing nitrogen/oxygen-containing functional groups such as amide, pyridinic, carbonyl, carboxyl, etc., into the surface by ethylenediamine (EDA) were proposed. The samples were characterized by various analyses including N2 adsorption/desorption, Boehm titration, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Results showed that the NAPOC played a crucial role in promoting the formation of oxygen-containing initiators, and difference of NAPOC resulted in different reaction principles. At higher NAPOC, more carbonyl, carboxyl and hydroxyl functional groups were formed, which facilitated the decoration of nitrogen binding active sites of amide and pyridinic for mercury ions adsorption into the carbon lattice of mesoporous biomass-derived biochar (MBB). The proportions of micropore and mesopore remained basically unchanged, indicating that the decorated nitrogen/oxygen sites were highly uniformly dispersed in MBB's frame and thus resulted in high activity. The comparison of adsorption properties of MBB showed that MBB-25-EDA had the highest adsorption capacity of 153 mg g-1 at pH 6, confirming that the 25% was the optimum NAPOC for introducing nitrogen/oxygen functional binding sites for effectively anchoring mercury.
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Affiliation(s)
- Boyu Li
- College of Engineering, Nanjing Agricultural University, Nanjing, 210031, China
| | - Kunquan Li
- College of Engineering, Nanjing Agricultural University, Nanjing, 210031, China.
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Yu D, Wang L, Wu M. Simultaneous removal of dye and heavy metal by banana peels derived hierarchically porous carbons. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.08.038] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Nassar MY, Ahmed IS, Hendy HS. A facile one-pot hydrothermal synthesis of hematite (α-Fe2O3) nanostructures and cephalexin antibiotic sorptive removal from polluted aqueous media. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.057] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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