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Xu Y, Yin Y, Luan YN, Wang Q, Zhao Z, Guo Z, Liu C. Efficient phosphate removal by Mg-La binary layered double hydroxides: synthesis optimization, adsorption performance, and inner mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:29132-29147. [PMID: 38568311 DOI: 10.1007/s11356-024-32838-5] [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: 11/08/2023] [Accepted: 03/05/2024] [Indexed: 05/01/2024]
Abstract
Layered double hydroxides (LDH) hold great promise as phosphate adsorbents; however, the conventional binary LDH exhibits low adsorption rate and adsorption capacity. In this study, Mg and La were chosen as binary metals in the synthesis of Mg-La LDH to enhance phosphate efficient adsorption. Different molar ratios of Mg to La (2:1, 3:1, and 4:1) were investigated to further enhance P adsorption. The best performing Mg-La LDH, with Mg to La ratio is 4:1 (LDH-4), presented a larger adsorption capacity and faster adsorption rate than other Mg-La LDH. The maximum adsorption capacity (87.23 mg/g) and the rapid adsorption rate in the initial 25 min of LDH-4 (70 mg/(g·h)) were at least 1.6 times and 1.8 times higher than the others. The kinetics, isotherms, the effect of initial pH and co-existing anions, and the adsorption-desorption cycle experiment were studied. The batch experiment results proved that the chemisorption progress occurred on the single-layered LDH surface and the optimized LDH exhibited strong anti-interference capability. Furthermore, the structural characteristics and adsorption mechanism were further investigated by SEM, BET, FTIR, XRD, and XPS. The characterization results showed that the different metal ratios could lead to changes in the metal hydroxide layer and the main ions inside. At lower Mg/La ratios, distortion occurred in the hydroxide layer, resulting in lower crystallinity and lower performance. The characterization results also proved that the main mechanisms of phosphate adsorption are electrostatic adsorption, ion exchange, and inner-sphere complexation. The results emphasized that the Mg-La LDH was efficient in phosphate removal and could be successfully used for this purpose.
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Affiliation(s)
- Yanming Xu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Yue Yin
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Ya-Nan Luan
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Qing Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Zhuo Zhao
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Zhonghong Guo
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China
| | - Changqing Liu
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China.
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Lu S, Zhu Q, Li R. Selective adsorption of nitrate in water by organosilicon quaternary ammonium salt modified derived nickel-iron layered double hydroxide: Adsorption characteristics and mechanism. J Colloid Interface Sci 2023; 652:1481-1493. [PMID: 37659316 DOI: 10.1016/j.jcis.2023.08.150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/15/2023] [Accepted: 08/23/2023] [Indexed: 09/04/2023]
Abstract
Nitrate (NO3-) is a widespread pollutant in the water environment. Due to its physicochemical properties, such as negative monovalent charge, traditional adsorption treatment processes have low selectivity for NO3- removal, resulting in low removal efficiency of NO3- by adsorbents in the presence of interfering ions. Therefore, to improve the adsorption selectivity and efficiency of NO3-. In this study, we used organosilicon quaternary modified derived nickel-iron layered double hydroxide (NiFe-MLDH/OQAS) for selective removal of NO3-. NiFe-MLDH/OQAS has a flowery globular structure, with interconnected nanosheets on the surface providing more adsorption sites for NO3-, which improves the adsorption rate and adsorption amount. What's more, the nitrate removal rate of NiFe-MLDH/OQAS only decreased by about 14.36% in the presence of the same concentration of interfering ions, and the maximum adsorption amount reached 61.05 mg/g, showing good selectivity and adsorption amount. Various characterization analyses indicate that the nitrate selectivity of NiFe-MLDH/OQAS is attributed to its unique layer spacing, as well as the abundant functional groups on the material surface. Finally, we demonstrated through experiments that NiFe-MLDH/OQAS has good cyclic regeneration ability and environmental safety. These findings demonstrate the great potential of NiFe-MLDH/OQAS for selective adsorption of NO3-.
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Affiliation(s)
- Shanshan Lu
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin 150080, China
| | - Qi Zhu
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin 150080, China.
| | - Renjing Li
- School of Chemistry and Materials Science, Heilongjiang University, Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, Harbin 150080, China
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Lima Paulino JCP, da Silva AF, da Silva Santos DH, de Carvalho Nagliate P, Meili L. Hotspots and Trends of Layered Double Hydroxide-based Adsorbents for Polluted Water Treatment: Insights from Bibliometric Analysis. ENVIRONMENTAL MANAGEMENT 2023; 71:1098-1109. [PMID: 36539637 DOI: 10.1007/s00267-022-01770-0] [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: 09/16/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
The use of layered double hydroxides (LDHs) as adsorbent for water treatment has been gaining relevance in recent years. In this context, this work aimed to map, through a bibliometric study, the extent of research that deals with the theme. The scientific database used was the Web of Science, and the chronology of the search consideredthe period from 1997 to 2022. The bibliometix R-package and VOSviewer software were used in this study. The searches retrieved a total of 663 documents, from 69 countries, distributed among all continents, which China (328), India (51) and Japan (40) were the most productive countries. Important journals in the environmental area and with high impact factor, such as Chemical Engineering Journal (44), Applied Clay Science (38), Journal of Hazardous Materials (35) and Chemosphere (27) most published in the area. The network of keywords used by the authors indicates that the publications retrieved deal mainly with aspects related to the efficiency of (LDHs) in the removal of different pollutants, the composition, the synthesis route and the association with other materials and/or techniques. The result of this study constitutes an important tool for directing future research on the subject.
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Affiliation(s)
- Juliana Cristina Pereira Lima Paulino
- Laboratory of Processes, Center of Technology, Federal University of Alagoas, Av. Lourival de Melo Mota, s/n, Campus A. C. Simões, Tabuleiro dos Martins, Maceió, AL, 57072-970, Brazil
| | - Anamália Ferreira da Silva
- Laboratory of Processes, Center of Technology, Federal University of Alagoas, Av. Lourival de Melo Mota, s/n, Campus A. C. Simões, Tabuleiro dos Martins, Maceió, AL, 57072-970, Brazil
| | - Danilo Henrique da Silva Santos
- Laboratory of Processes, Center of Technology, Federal University of Alagoas, Av. Lourival de Melo Mota, s/n, Campus A. C. Simões, Tabuleiro dos Martins, Maceió, AL, 57072-970, Brazil
| | - Patrícia de Carvalho Nagliate
- School of Nursing, Federal University of Alagoas, Av. Lourival de Melo Mota, s/n, Campus A. C. Simões, Tabuleiro dos Martins, Maceió, AL, 57072-970, Brazil
| | - Lucas Meili
- Laboratory of Processes, Center of Technology, Federal University of Alagoas, Av. Lourival de Melo Mota, s/n, Campus A. C. Simões, Tabuleiro dos Martins, Maceió, AL, 57072-970, Brazil.
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Chu L, Zhang C, Yu J, Sun X, Zhou X, Zhang Y. Adsorption of nitrate from interflow by the Mg/Fe calcined layered double hydroxides. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:511-529. [PMID: 35960834 DOI: 10.2166/wst.2022.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nitrate loss in interflow caused serious nitrate pollution of neighboring water bodies in the purple soil region of China's Sichuan Province. In this study, Mg/Fe(Al)-calcined layered double hydroxides (Mg/Fe(Al)-CLDHs) with varied Mg/Fe(Al) ratios were synthesized for nitrate removal from interflow, and 3:1 Mg/Fe CLDH exhibited the best adsorption performance. The effects of initial pH, adsorbent dosage and co-existing anions on the adsorption performance were investigated by batch experiments. The best-fitting kinetic and isothermal models for nitrate adsorption were the pseudo-second-order model and Freundlich model, respectively, indicating that the adsorption process was a physical-chemical multilayer process. The maximum adsorption capacity of nitrate was 73.36 mg/g, which was higher than that of many other commonly used adsorbents. The adsorbents were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscope (TEM) and Brunauer-Emmett-Teller (BET) techniques, and the XRD and FT-IR results revealed that the adsorption mechanism involved original layered structure reconstruction and ion-exchange interaction. Under the coexistence of SO42- and Cl-, 75.63% nitrate in interflow could be removed after 6 h of adsorption. Overall, the synthesized Mg/Fe CLDH is an effective and low-cost nitrate adsorbent for in-situ nitrate removal.
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Affiliation(s)
- Liquan Chu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Chaojie Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Jing Yu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Xu Sun
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Yalie Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
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da Gama BMV, Selvasembian R, Giannakoudakis DA, Triantafyllidis KS, McKay G, Meili L. Layered Double Hydroxides as Rising-Star Adsorbents for Water Purification: A Brief Discussion. Molecules 2022; 27:molecules27154900. [PMID: 35956849 PMCID: PMC9370053 DOI: 10.3390/molecules27154900] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 12/29/2022] Open
Abstract
Within the frame of this article, briefly but comprehensively, we present the existing knowledge, perspectives, and challenges for the utilization of Layered Double Hydroxides (LDHs) as adsorbents against a plethora of pollutants in aquatic matrixes. The use of LDHs as adsorbents was established by considering their significant physicochemical features, including their textural, structural, morphological, and chemical composition, as well as their method of synthesis, followed by their advantages and disadvantages as remediation media. The utilization of LDHs towards the adsorptive removal of dyes, metals, oxyanions, and emerging pollutants is critically reviewed, while all the reported kinds of interactions that gather the removal are collectively presented. Finally, future perspectives on the topic are discussed. It is expected that this discussion will encourage researchers in the area to seek new ideas for the design, development, and applications of novel LDHs-based nanomaterials as selective adsorbents, and hence to further explore the potential of their utilization also for analytic approaches to detect and monitor various pollutants.
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Affiliation(s)
| | - Rangabhashiyam Selvasembian
- Department of Biotechnology, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamilnadu, India;
| | - Dimitrios A. Giannakoudakis
- Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
- Correspondence: (D.A.G.); (L.M.)
| | | | - Gordon McKay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, P.O. Box 5825 Doha, Qatar;
| | - Lucas Meili
- Laboratory of Processes, Center of Technology, Federal University of Alagoas, Maceió 57072-900, AL, Brazil;
- Correspondence: (D.A.G.); (L.M.)
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6
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Fang K, Deng L, Yin J, Yang T, Li J, He W. Recent advances in starch-based magnetic adsorbents for the removal of contaminants from wastewater: A review. Int J Biol Macromol 2022; 218:909-929. [PMID: 35914554 DOI: 10.1016/j.ijbiomac.2022.07.175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 07/03/2022] [Accepted: 07/22/2022] [Indexed: 02/09/2023]
Abstract
Considerable concern exists regarding water contamination by various pollutants, such as conventional pollutants (e.g., heavy metals and organics) and emerging micropollutants (e.g., consumer care products and interfering endocrine-related compounds). Currently, academics are continuously exploring sustainability-related materials and technologies to remove contaminants from wastewater. Magnetic starch-based adsorbents (MSAs) can combine the advantages of starch and magnetic nanoparticles, which exhibit unique critical features such as availability, cost-effectiveness, size, shape, crystallinity, magnetic properties, stability, adsorption properties, and excellent surface properties. However, limited reviews on MSAs' preparations, characterizations, applications, and adsorption mechanisms could be available nowadays. Hence, this review not only focuses on their activation and preparation methods, including physical (e.g., mechanical activation treatment, microwave radiation treatment, sonication, and extrusion), chemical (e.g., grafting, cross-linking, oxidation and esterification), and enzymatic modifications to enhance their adsorption properties, but also offers an all-round state-of-the-art analysis of the full range of its characterization methods, the adsorption of various contaminants, and the underlying adsorption mechanisms. Eventually, this review focuses on the recycling and reclamation performance and highlights the main gaps in the areas where further studies are warranted. We hope that this review will spark an interdisciplinary discussion and bring about a revolution in the applications of MSAs.
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Affiliation(s)
- Kun Fang
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials Guangxi University, Nanning 530004, Guangxi, China; College of Light Industry and Food Engineering, the Collaborative Innovation Center for Guangxi Sugar Industry, Nanning 530004, Guangxi, China
| | - Ligao Deng
- College of Light Industry and Food Engineering, the Collaborative Innovation Center for Guangxi Sugar Industry, Nanning 530004, Guangxi, China
| | - Jiangyu Yin
- College of Light Industry and Food Engineering, the Collaborative Innovation Center for Guangxi Sugar Industry, Nanning 530004, Guangxi, China
| | - Tonghan Yang
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials Guangxi University, Nanning 530004, Guangxi, China
| | - Jianbin Li
- College of Light Industry and Food Engineering, the Collaborative Innovation Center for Guangxi Sugar Industry, Nanning 530004, Guangxi, China.
| | - Wei He
- School of Chemistry and Chemical Engineering, School of Resources, Environment and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials Guangxi University, Nanning 530004, Guangxi, China.
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7
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Oliveira EN, Meneses AT, de Melo SF, Dias FMR, Perazzini MTB, Perazzini H, Meili L, Soletti JI, Carvalho SHV, Bispo MD. Highly effective adsorption of caffeine by a novel activated carbon prepared from coconut leaf. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:50661-50674. [PMID: 35235121 DOI: 10.1007/s11356-022-18788-w] [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: 09/17/2021] [Accepted: 01/17/2022] [Indexed: 06/14/2023]
Abstract
The disposal of coconut wastes is costly and damaging to the environment, but its uses are advantageous activated carbons production. Coconut leaves waste were used for activated carbon production by pyrolysis at 500° C and activation with potassium carbonate. The activated carbon was used for caffeine removal from aqueous solution. The coconut leaves activated carbon showed a predominantly amorphous structure from X-ray diffraction analysis and a pH at the zero charge point of 7.9. From the N2 adsorption/desorption method, the adsorbent showed a predominance of mesopores, with average pore size of 45.48 ηm and a surface area of 678.03 m2/g. From kinetic studies the data followed the pseudo-second order, where the intraparticle diffusion can be neglected. The adsorption isotherms were satisfactorily adjusted for the Redlich-Peterson model and a type curve L was identified. The thermodynamic parameters showed that adsorption occurred spontaneously, was exothermic and governed by physical adsorption. The artificial neural networks developed were capable of predicting both kinetics and equilibrium adsorption data under different operating conditions and was comparable to the traditional models available in literature in the training experiments, encouraging its use for data generalization when an efficient dataset is used. In conclusion, coconut leaves waste showed to be a promising feedstock to produce activated carbon aiming caffeine removal from water and wastewater.
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Affiliation(s)
- Elvio N Oliveira
- Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Alex T Meneses
- Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Samara F de Melo
- Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Franciele M R Dias
- Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Maisa T B Perazzini
- Institute of Natural Resources, Federal University of Itajubá-UNIFEI, Itajubá, MG, Brazil
| | - Hugo Perazzini
- Institute of Natural Resources, Federal University of Itajubá-UNIFEI, Itajubá, MG, Brazil
| | - Lucas Meili
- Laboratory of Processes (LAPRO), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - João I Soletti
- Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Sandra H V Carvalho
- Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil
| | - Mozart D Bispo
- Laboratory of Separation Systems and Process Optimization (LASSOP), Center of Technology, Federal University of Alagoas (UFAL), Maceió, Alagoas, Brazil.
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Mg-Al Layered Double Hydroxide Doped Activated Carbon Composites for Phosphate Removal from Synthetic Water: Adsorption and Thermodynamics Studies. SUSTAINABILITY 2022. [DOI: 10.3390/su14126991] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Increased phosphate concentration in water bodies has led to eutrophication, and its removal is an inevitable requirement of sustainable wastewater purification systems. In this study, MgAl layered doubled hydroxide (LDH) composites doped on the surface of activated carbon (AC/MgAl LDH) with various (Mg + Al) total metal loading (5 wt%, 10 wt%, and 15 wt%) were prepared by the co-precipitation method. The influence of (Mg + Al) total metal loading onto AC was examined to remove phosphate ions from aqueous solutions. The effect of adsorption parameters, including adsorbent dosage, initial solution pH, initial phosphate concentration, contact time, and experiment temperature, were investigated via batch adsorption experiments. The adsorption results demonstrated that the phosphate adsorption capacity significantly improved with increasing the (Mg + Al) metal loading on the surface of AC. The maximum Langmuir phosphate adsorption capacity was 337.2 mg phosphate per gram of AC/MgAl-3 LDH composite (15 wt% Mg + Al) composite at pH ~6.3, 22 °C, and 1 g/L of adsorbent. The kinetic data were best fitted with the pseudo-second order model. The initial solution pH notably influenced the phosphate removal by AC/MgAl-3 LDH composite with a maximum removal at pH 2.3. According to the spent adsorbent characterization results, the dominant mechanisms of phosphate removal by AC/MgAl-3 LDH were electrostatic interactions, ion exchange, and inner-sphere complexation. The phosphate adsorption capacity was gradually increased with increasing the experiment temperature, suggesting an endothermic adsorption process. Overall, the AC/MgAl LDH composites pave the way for an effective strategy for phosphate removal from aqueous solutions.
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Elhachmi M, Chemat Z, Chebli D, Bouguettoucha A, Abdeltif A. Synthesis and physicochemical characterization of new calcined layered double hydroxide MgZnCoAl-CO3; Classical modeling and statistical physics of nitrate adsorption. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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10
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Liu Y, Zhang X, Wang J. A critical review of various adsorbents for selective removal of nitrate from water: Structure, performance and mechanism. CHEMOSPHERE 2022; 291:132728. [PMID: 34718027 DOI: 10.1016/j.chemosphere.2021.132728] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/23/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
Nitrate is ubiquitous pollutant due to its high water solubility, usually contributing to eutrophication, and posing a threat to aquatic ecosystem and human health. Adsorption approach has been widely used for nitrate removal because of the simplicity, easy operation, and low cost. Adsorbent plays a key role in the adsorptive removal of nitrate. The adsorption performance and adsorption mechanism are determined by the structural feature of adsorbent that is dependent on the preparation method. In this review, various types of adsorbents for nitrate removal were systematically summarized, their preparation, characterization, and adsorption performance were evaluated; the factors influencing the nitrate adsorption performance were discussed; the adsorption isotherm models, kinetic models and thermodynamic parameters were examined; and the possible adsorption mechanisms responsible for nitrate adsorption were categorized; the possible correlation of adsorbent structure to adsorption performance and adsorption mechanism were explained; the potential applications of adsorbents were discussed; finally, the strategies for improving adsorption capacity and selectivity towards nitrate, the challenges and future perspectives for developing novel adsorbent were also proposed. This review will deepen the understanding of nitrate removal by adsorption process and help the development of high-performance adsorbents for selective nitrate removal from water and wastewater.
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Affiliation(s)
- Yong Liu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China; Key Laboratory of Treatment for Special Wastewater of Sichuan Province Higher Education Process, Sichuan, Chengdu, 610066, China
| | - Xuemei Zhang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China
| | - Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, China.
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Silva AFD, Duarte JLDS, Meili L. Different routes for MgFe/LDH synthesis and application to remove pollutants of emerging concern. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118353] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Jiang Z, Wu J, Liu X, Yu H, Jiao C, Shen J, Pei Y. Facile synthesis of MgAl layered double hydroxides by a co-precipitation method for efficient nitrate removal from water: kinetics and mechanisms. NEW J CHEM 2021. [DOI: 10.1039/d1nj02035h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A series of MgAl-LDH as highly efficient adsorbents for removing low concentrations of NO3− were synthesized. The mechanism of NO3− removal has been comprehensively discussed in terms of its characterization, adsorption kinetics and thermodynamics.
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Affiliation(s)
- Zhuwu Jiang
- College of Ecological Environment and Urban Construction
- Fujian University of Technology
- Fuzhou
- China
- College of Civil Engineering
| | - Jiangnan Wu
- College of Ecological Environment and Urban Construction
- Fujian University of Technology
- Fuzhou
- China
| | - Xinru Liu
- College of Ecological Environment and Urban Construction
- Fujian University of Technology
- Fuzhou
- China
| | - Hai Yu
- College of Ecological Environment and Urban Construction
- Fujian University of Technology
- Fuzhou
- China
| | - Chengyuan Jiao
- College of Ecological Environment and Urban Construction
- Fujian University of Technology
- Fuzhou
- China
| | - Jyunhong Shen
- College of Ecological Environment and Urban Construction
- Fujian University of Technology
- Fuzhou
- China
| | - Yanyan Pei
- College of Ecological Environment and Urban Construction
- Fujian University of Technology
- Fuzhou
- China
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13
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Magnetic Mg-Fe/LDH Intercalated Activated Carbon Composites for Nitrate and Phosphate Removal from Wastewater: Insight into Behavior and Mechanisms. NANOMATERIALS 2020; 10:nano10071361. [PMID: 32664637 PMCID: PMC7407415 DOI: 10.3390/nano10071361] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/03/2020] [Accepted: 07/09/2020] [Indexed: 11/17/2022]
Abstract
This experimental work focused on the synthesis, characterization, and testing of a unique, magnetically separable, and eco-friendly adsorbent composite material for the advanced treatment and efficient removal of nitrate and phosphate pollutants from wastewater. The MgAl-augmented double-layered hydroxide (Mg-Fe/LDH) intercalated with sludge-based activated carbon (SBAC-MgFe) composites were characterized by FT-IR, XRD, BET, VSM, SEM, and TEM techniques, revealing homogeneous and efficient dispersion of MgFe/LDH within the activated carbon (AC) matrix, a highly mesoporous structure, and superparamagnetic characteristics. The initial solution pH, adsorbent dose, contact time, and temperature parameters were optimized in order to reach the best removal performance for both pollutants. The maximum adsorption capacities of phosphate and nitrate were found to be 110 and 54.5 mg/g, respectively. The competition between phosphate and coexisting ions (Cl−, CO32−, and SO42−) was studied and found to be remarkably lower in comparison with the nitrate adsorption. The adsorption mechanisms were elucidated by kinetic, isotherm, thermodynamic modeling, and post-adsorption characterizations of the composite. Modeling and mechanistic studies demonstrated that physisorption processes such as electrostatic attraction and ion exchange mainly governed the nitrate and phosphate adsorption. The composite indicated an outstanding regeneration performance even after five sequences of adsorption/desorption cycles. The fabricated composite with magnetically separable characteristics can be used as a promising adsorbent for the removal of phosphate and nitrate pollutants from wastewater.
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Yadav MK, Gupta AK, Ghosal PS, Mukherjee A. Remediation of carcinogenic arsenic by pyroaurite-based green adsorbent: isotherm, kinetic, mechanistic study, and applicability in real-life groundwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:24982-24998. [PMID: 32342408 DOI: 10.1007/s11356-020-08868-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 04/13/2020] [Indexed: 06/11/2023]
Abstract
The removal of the harmful carcinogen arsenic from drinking water by a green technology is a major concern in the field of environmental engineering. The sorptive profile of arsenic remediation by calcined Mg-Fe-layered double hydroxide, fabricated by a one-pot synthesis technique, was investigated to delineate its applicability in real-life water. The physicochemical properties of adsorbent, as demonstrated from spectroscopy and microscopy, which described the existence of amorphous material with significant surface roughness possess selectivity towards arsenic. The isotherm and kinetic along with thermodynamic modeling exhibited the occurrence of spontaneous (ΔG0 value = - 8.084 kJ/mol to - 10.942 kJ/mol), endothermic (ΔH0 value = 12.135 kJ/mol), and physisorption reactions (Ead = 4.103-5.832 kJ/mol, Ea = 11.546 kJ/mol, S* = 0.0005 << 1, and ΔHx = 9.23-16.29 kJ/mol) with high uptake rate and adsorption potential of adsorbent. The isotherm and kinetics were demonstrated by Temkin (R2 = 0.944-0.969) and Elovich (R2 = 0.996-0.998) models, respectively, with high statistical significance. The intraparticle diffusion model which established the rate-limiting step is the combination of both film and pore diffusions. The applicability of layered double hydroxide (LDH) material in the real-life water was confirmed by isotherm and kinetic modeling along with the regeneration/reuse potential. The adsorptive removal of arsenic by the LDH material exhibited to be a promising technique without creating any secondary hazard.
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Affiliation(s)
- Manoj Kumar Yadav
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Ashok Kumar Gupta
- Department of Civil Engineering, Environmental Engineering Division, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
| | - Partha Sarathi Ghosal
- School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Abhijit Mukherjee
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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