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Yang Z, Li L, Wang Y. Mechanism of Phosphate Desorption from Activated Red Mud Particle Adsorbents. Molecules 2024; 29:974. [PMID: 38474486 DOI: 10.3390/molecules29050974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 02/11/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024] Open
Abstract
Herein, activated red mud particles are used as adsorbents for phosphorus adsorption. HCl solutions with different concentrations and deionized water are employed for desorption tests, and the desorption mechanism under the following optimal conditions is investigated: HCl concentration = 0.2 mol/L, desorbent dosage = 0.15 L/g, desorption temperature = 35 °C, and desorption time = 12 h. Under these conditions, the phosphate desorption rate and amount reach 99.11% and 11.29 mg/g, respectively. Notably, the Langmuir isothermal and pseudo-second-order kinetic linear models exhibit consistent results: monomolecular-layer surface desorption is dominant, and chemical desorption limits the rate of surface desorption. Thermodynamic analysis indicates that phosphorus desorption by the desorbents is spontaneous and that high temperatures promote such desorption. Moreover, an intraparticle diffusion model demonstrates that the removal of phosphorus in the form of precipitation from the surface of an activated hematite particle adsorbent primarily occurs via a chemical reaction, and surface micromorphological analysis indicates that desorption is primarily accompanied by Ca dissolution, followed by Al and Fe dissolutions. The desorbents react with the active elements in red mud, and the vibrations of the [SiO4]4- functional groups of calcium-iron garnet and calcite or aragonite disappear. Further, in Fourier-transform infrared spectra, the intensities of the peaks corresponding to the PO43- group considerably decrease. Thus, desorption primarily involves monomolecular-layer chemical desorption.
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Affiliation(s)
- Zhiwen Yang
- Mining College, Guizhou University, Guiyang 550025, China
- National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
- Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang 550025, China
| | - Longjiang Li
- Mining College, Guizhou University, Guiyang 550025, China
- National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
- Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang 550025, China
| | - Yalan Wang
- Mining College, Guizhou University, Guiyang 550025, China
- National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China
- Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang 550025, China
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Sunny AA, Meng Q, Kumar S, Joshi R, Fan LS. Nanoscaled Oxygen Carrier-Driven Chemical Looping for Carbon Neutrality: Opportunities and Challenges. Acc Chem Res 2023; 56:3404-3416. [PMID: 37956385 DOI: 10.1021/acs.accounts.3c00517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
ConspectusClimate change poses unprecedented challenges, demanding efforts toward innovative solutions. Amid these efforts, chemical looping stands out as a promising strategy, attracting attention for its CO2 capture prowess and versatile applications. The chemical looping approach involves fragmenting a single reaction, often a redox reaction, into multiple subreactions facilitated by a carrier, frequently a metal oxide. This innovative method enables diverse chemical transformations while inherently segregating products, enhancing process flexibility, and fostering autothermal properties. An intriguing facet of this novel technique lies in its capacity for CO2 utilization in processes like dry reforming and gasification of carbon-based feeds such as natural gas and biomass. Central to the success of chemical looping technology is a profound understanding of the intricacies of redox chemistry within these processes. Notably, nanoscaled oxygen carriers have proven effective, characterized by their extensive surface area and customizable structure. These carriers hold substantial promise, enabling reactions under milder conditions.This Account offers a concise overview of the mechanisms, benefits, opportunities, and challenges associated with nanoscaled carriers in chemical looping applications, with a focus on CO2 utilization. We delve into the nuances of redox chemistry, shedding light on ionic diffusion and oxygen vacancy─two key elements that are crucial in designing oxygen carriers. This discussion extends to nanospecific factors such as the particle size effect and gas diffusivity. Through the application of density functional theory simulations, insights are drawn regarding the impact of nanoparticle size on syngas production in chemical looping. Interestingly, nanosized iron oxide (Fe2O3) carriers exhibit elevated syngas selectivity and constrained CO2 formation at the nanoscale. Moreover, the reactivity enhancement of mesoporous SBA-16 supported Fe2O3 over mesoporous SBA-15 supported Fe2O3 is elucidated through Monte Carlo simulations that emphasize the superiority of the 3-dimensional interconnected porous network of SBA-16 in enhancing gas diffusion, thereby amplifying reactivity compared to the 2-dimensional SBA-15. Furthermore, we explore prevalent nanoscaled carriers, focusing on their amplified performance in CO2 utilization schemes. These encompass the integration of nanoparticles with mesoporous supports to enhance surface area, the adoption of nanoscale core-shell architectures to enhance diffusion, and the dispersion of nanoscaled active sites on microsized carriers to accelerate reactant activation. Notably, our mesoporous-supported Fe2O3 nanocarrier facilitates methane dissociation and oxidation by reducing energy barriers, thereby promoting methane conversion. The Account proceeds to outline key challenges and prospects for nanoscaled carriers in chemical looping, concluding with a glance into future research directions. We also shine a spotlight on our research group's efforts in innovating oxygen carrier materials, supplemented by discussions on indispensable elements that are essential for successful scale-up deployment.
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Affiliation(s)
- Ashin A Sunny
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Qichang Meng
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Sonu Kumar
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Rushikesh Joshi
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Liang-Shih Fan
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
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Cao Y, Wu X, Li B, Tang X, Lin X, Li P, Chen H, Huang F, Wei C, Wei J, Qiu G. Ca-La layered double hydroxide (LDH) for selective and efficient removal of phosphate from wastewater. CHEMOSPHERE 2023; 325:138378. [PMID: 36906008 DOI: 10.1016/j.chemosphere.2023.138378] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/02/2023] [Accepted: 03/09/2023] [Indexed: 06/18/2023]
Abstract
Adsorption showed advantages in removing phosphorus (P) at low concentrations. Desirable adsorbents should have sufficiently high adsorption capacity and selectivity. In this study, a Ca-La layered double hydroxide (LDH) was synthesized for the first time by using a simple hydrothermal coprecipitation method for phosphate removal from wastewater. A maximum adsorption capacity of 194.04 mgP/g was achieved, ranking on the top of known LDHs. Adsorption kinetic experiments showed that 0.02 g/L Ca-La LDH could effectively reduce PO43-P from 1.0 to <0.02 mg/L within 30 min. With the copresence of bicarbonate and sulfate at concentrations 17.1 and 35.7 times of that of PO43-P, the Ca-La LDH showed promising selectivity towards phosphate (with a reduction in the adsorption capacity of <13.6%). In addition, four other (Mg-La, Co-La, Ni-La, and Cu-La) LDHs containing different divalent metal ions were synthesized by using the same coprecipitation method. Results showed much higher P adsorption performance of the Ca-La LDH than those LDHs. Field Emission Electron Microscopy (FE-SEM)-Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared Spectroscopy (FTIR), and mesoporous analysis were performed to characterize and compare the adsorption mechanisms of different LDHs. The high adsorption capacity and selectivity of the Ca-La LDH were mainly explained by selective chemical adsorption, ion exchange, and inner sphere complexation.
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Affiliation(s)
- Yuhang Cao
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Xuewei Wu
- Guangzhou Sewage Purification Co., Ltd, Guangzhou, 510006, China
| | - Biqing Li
- Guangzhou Sewage Purification Co., Ltd, Guangzhou, 510006, China
| | - Xia Tang
- Guangzhou Sewage Purification Co., Ltd, Guangzhou, 510006, China
| | - Xueran Lin
- Guangzhou Sewage Purification Co., Ltd, Guangzhou, 510006, China
| | - Pengfei Li
- Guangzhou Sewage Purification Co., Ltd, Guangzhou, 510006, China
| | - Hang Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Fu Huang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Chaohai Wei
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Key Laboratory of Pollution Control and Ecological Restoration in Industrial Clusters, Ministry of Education, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, China
| | - Jian Wei
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
| | - Guanglei Qiu
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Key Laboratory of Pollution Control and Ecological Restoration in Industrial Clusters, Ministry of Education, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, China.
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Jing X, Li Y, Shen Y, Li Q, Fang Q. Constructing 3D flower-like LaFe bimetal oxides with abundant mesoporous and controllable active sites for high-efficient phosphorus removal: Synthesis, mechanism, and application. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 859:160334. [PMID: 36410488 DOI: 10.1016/j.scitotenv.2022.160334] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/24/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
The design of high-performance porous adsorbents for phosphorus removal is a persistently hot topic to maintain a sustainable aquatic ecosystem. In the present study, a self-templating strategy using LaFe cyanometallates (CMs) as precursors was adopted to prepare porous LaFe bimetal oxides with optimizable structure and composition for phosphate adsorption. The results showed that a high supplied LaIII/FeII ratio enabled an adequate coordination polymerization in the preparation of LaFe CM precursor and led to a striking three-dimensional (3D) structure of "twin lotus flower" with high coordinated water content, which resulted in a 3D flower-like LaFe oxide with high surface area and high porosity (mainly in mesopore). The LaFe oxide of LaFe15T possessing the optimal La/Fe ratio (1.5: 1) exhibited the most superior performance of phosphate adsorption, where La was confirmed to be the main active site for phosphate capture via ligand exchange mechanism. The batch and column tests of phosphate adsorption showed that the 3D flower-like LaFe oxides are effective adsorbents for phosphate removal. Therefore, the structure optimization in the template preparation stage is an effective strategy to design porous LaFe bimetal oxides as high-performance phosphorus removal materials.
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Affiliation(s)
- Xiaoxu Jing
- Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, PR China; Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology, Department of Environmental Engineering, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Yungui Li
- Sichuan Provincial Sci-Tech Cooperation Base of Low-cost Wastewater Treatment Technology, Department of Environmental Engineering, Southwest University of Science and Technology, Mianyang 621010, PR China
| | - Yi Shen
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310032, PR China
| | - Qingqing Li
- Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, PR China
| | - Qile Fang
- Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, PR China; State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
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Fu C, Li Y, Zuo Y, Li B, Liu C, Liu D, Fu Y, Yin Y. Fabrication of lanthanum/chitosan co-modified bentonite and phosphorus removal mechanism from low-concentration landscape water. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:1017-1033. [PMID: 36358043 DOI: 10.2166/wst.2022.251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
It is essential to solve the problem of phosphorus pollution in urban landscape water and reduce the degree of eutrophication. In this paper, lanthanum-modified bentonite (La-B) was prepared by high-temperature calcination and liquid-phase precipitation. Then La-B was modified with chitosan to prepare a low-cost environment-friendly functional material: lanthanum/chitosan co-modified bentonite (La-BC). It can reach the adsorption equilibrium within 30 min, and the maximum adsorption capacity is 15.5 mg/g (initial phosphate concentration 50 mg/L); when the target concentration is 2 mg/L, the removal rate can reach 98.5%. La-BC has a stronger anti-interference ability to common coexisting anions SO42-, HCO3-, NO3- and Cl- in the urban landscape water body. La-BC has excellent performance in weakly acidic to neutral water, and its pH applicable range has been improved, making it possible to apply in practical water. The fitting results show that the adsorption behavior conforms to the pseudo-second-order kinetic model and the Freundlich model. After 5 regenerations, the removal efficiency remained around 80%. In the actual water test results, the phosphate concentration can be controlled below 0.1 mg/L and the removal rate is above 75%. Due to its low cost and reusability, it has great potential in the practical application of phosphate removal from landscape water.
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Affiliation(s)
- Chengbin Fu
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Ye Li
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Yangyang Zuo
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Bolin Li
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Chang Liu
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Dongxue Liu
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Yan Fu
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
| | - Yixin Yin
- School of Resources and Environment Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China E-mail:
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6
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Han L, Wang Y, Zhao W, Zhang H, Guo F, Wang T, Wang W. Cost-effective and eco-friendly superadsorbent derived from natural calcium-rich clay for ultra-efficient phosphate removal in diverse waters. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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7
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Liu B, Gai S, Lan Y, Cheng K, Yang F. Metal-based adsorbents for water eutrophication remediation: A review of performances and mechanisms. ENVIRONMENTAL RESEARCH 2022; 212:113353. [PMID: 35483409 DOI: 10.1016/j.envres.2022.113353] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
Controlling eutrophication requires satisfying stringent phosphorus concentration standards. Metal-based adsorbents can effectively remove excess phosphorus from water bodies and achieve ultra-low phosphorus concentration control for wastewater. This review focuses on the material properties and phosphorus removal mechanism of metal-based adsorbents (Fe, Al, Ca, Mg, La). There are significant differences in physical and chemical properties of different metal materials, due to the different preparation methods and synthetic materials. The main factors affecting phosphorus removal performance include particle size, crystal structure and pHPZC. Smaller particle size, more disordered crystal structure and higher pHPZC are more favorable for phosphorus removal. The main mechanism of phosphorus removal by metal-based adsorbents is ligand exchange, which makes it exhibit excellent adsorption capacity, fast kinetics and well selectivity for phosphate. In addition, in order to improve the phosphorus removal performance, the surface properties of the adsorbent (e.g., surface charge, surface area, and functional groups) can be effectively improved by dispersion of biochar carriers or combination of multiple metal materials. In further studies, we should improve the absorption capacity of the adsorbent under high pH conditions and the resistance to coexisting ion interference. Finally, in order to ensure the effective application of metal-based adsorbents in the phosphorus removal field, experimental scale should be expanded in future work to suit the actual water body conditions.
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Affiliation(s)
- Bing Liu
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Shuang Gai
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Yibo Lan
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China
| | - Kui Cheng
- College of Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China.
| | - Fan Yang
- School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Joint Laboratory of Northeast Agricultural University and Max Planck Institute of Colloids and Interfaces (NEAU-MPICI), Harbin, 150030, China.
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8
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Indeewari KM, Dunuweera SP, Dunuweera AN, Rajapakse RMG. Synthesis and Characterization of 2D Magnesium Oxide Nanoflakes: A Potential Nanomaterial for Effective Phosphate Removal from Wastewater. ChemistrySelect 2022. [DOI: 10.1002/slct.202103973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kanaththage M. Indeewari
- Department of Chemistry Postgraduate Institute of Science University of Peradeniya Peradeniya Sri Lanka 20400
| | - Shashiprabha P. Dunuweera
- Department of Chemistry Postgraduate Institute of Science University of Peradeniya Peradeniya Sri Lanka 20400
| | - Asiri N. Dunuweera
- Department of Basic Sciences Faculty of Allied Health Sciences University of Peradeniya Peradeniya Sri Lanka 20400
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Li Q, Zhang J, Gao J, Huang Z, Zhou H, Duan H, Zhang Z. Preparation of a novel non-burning polyaluminum chloride residue(PACR) compound filler and its phosphate removal mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1532-1545. [PMID: 34355321 DOI: 10.1007/s11356-021-15724-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
As an inevitable industrial by-product, polyaluminum chloride residue (PACR) will cause serious harm to the environment if directly buried and dumped. The aim of this paper was searched a new economical, environmental, and practical way of utilization for PACR. In this paper, a novel non-burning PACR compound filler was made from mainly PACR. The prepared compound filler has excellent physical properties and phosphate adsorption efficiency of up to 99.9%. Static adsorption experiments showed that the adsorption process of phosphorus by the compound filler conformed to the pseudo-second-order kinetic model and intra-particle diffusion model. Langmuir and Freundlich isotherm models described the phosphorus adsorption process well, and the maximum phosphate adsorption capacity arrived at 42.55 mg/g. The phosphate adsorption by the compound filler is a spontaneous endothermic process. The main mechanisms are ligand exchange and Lewis acid-base interactions; calcium and aluminum play important roles in the adsorption of phosphorus by the compound filler. Dynamic column experiments showed that as much as 90% of the phosphorus removal by compound filler, and the phosphorus concentration decreased from 1 to ~0.1mg/L. The results provide a new waste resource utilization method for PACR and show the good application potential of prepared compound filler in constructed wetlands.
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Affiliation(s)
- Qiang Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Jingshen Zhang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Jingqing Gao
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China.
| | - Zhenzhen Huang
- School of Water Conservancy and Engineering, Zhengzhou University, Zhengzhou, 450001, China.
| | - Haoxin Zhou
- School of Water Conservancy and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Haoyu Duan
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, China
| | - Zihao Zhang
- College of Environment, Hohai University, Nanjing, 210098, China
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Ahmed S, Zhang Y, Wu B, Zheng Z, Leung CF, Choy TY, Kwok YT, Lo IMC. Scaled-up development of magnetically recyclable Fe 3O 4/La(OH) 3 composite for river water phosphate removal: From bench-scale to pilot-scale study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 791:148281. [PMID: 34119786 DOI: 10.1016/j.scitotenv.2021.148281] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/19/2021] [Accepted: 06/02/2021] [Indexed: 06/12/2023]
Abstract
The use of magnetic lanthanum-based materials for phosphate removal from river water has gained increasing attention. However, challenges to produce and use lanthanum-based materials in large-scale or pilot-scale studies remain. In this work, a kilogram-scale Fe3O4/La(OH)3 magnetically recyclable composite for removing phosphate from river water was developed through a low-temperature precipitation route. The composite was used to remove phosphate from river water at both bench- and pilot-scales. Based on the bench-scale tests, the developed Fe3O4/La(OH)3 composite was found to have excellent magnetic particle separation efficiency (>98%) and a sorption capacity of 11.77 mg/g for phosphate. A 1.0 g/L dosage of the composite in the river water sample was able to selectively reduce the phosphate level from 0.089 to 0.005 mg/L in 60 min over five consecutive adsorption cycles. At the pilot-scale, the Fe3O4/La(OH)3 composite only achieved 36.0% phosphate removal efficiency, which is considerably different from the bench-scale results over an operational time of five months and a total treatment volume of 300 m3. This significantly reduced removal efficiency is mainly attributable to turbidity, suspended solids, and organic matter in the river water and the deteriorated magnetic separation efficiency. This study revealed potential challenges and shed new insights on moving magnetic nanocomposite-based technology from the bench-scale to the pilot-scale, which can inspire new designs for the application of similar technology.
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Affiliation(s)
- Saeed Ahmed
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Yanyang Zhang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Baile Wu
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Zexiao Zheng
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Chui-Fan Leung
- Water Supplies Department, Hong Kong Special Administrative Region, China
| | - Tak-Yip Choy
- Water Supplies Department, Hong Kong Special Administrative Region, China
| | - Yau-Ting Kwok
- Water Supplies Department, Hong Kong Special Administrative Region, China
| | - Irene M C Lo
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Institute for Advanced Study, The Hong Kong University of Science and Technology, Hong Kong, China.
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11
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Adsorption of phosphate ions from aqueous solutions by amorphous silica obtained by acid decomposition of nepheline. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Godbole R, Lee SJ, Kim YS, Seo HK, Kim BK, Chung HS, Jeong SH, Yoon DY, Lee HJ, Park JB. Efficient and additive-free synthesis of morphology variant iron oxyhydroxide nanostructures for phosphate adsorption application. NANOTECHNOLOGY 2021; 32:495602. [PMID: 34428759 DOI: 10.1088/1361-6528/ac2095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
Iron oxyhydroxide (FeOOH) nanostructures of different shapes were successfully synthesized on flexible textile cloth of polyester using a novel and simple technique based on hydrolysis method. The technique used herein is newly designed specifically to improve the efficiency in terms of energy, simplicity and cost involved in large scale synthesis of nanostructured thin films. Additionally, the morphology of nano-sized iron oxyhydroxide could be tuned into different shapes through variation in the type of precursors used for synthesis. The uniformity and adhesion of the depositions were also found to be excellent as examined by qualitative techniques. The as-deposited samples exhibited monoclinic and orthorhombic structures of FeOOH. A significant variation in the shape of as-deposited FeOOH nanostructures with change in precursor was observed through morphological studies, which displayed lance-shaped, rounded clusters and rod-like growth features in different cases. The nanocrystalline FeOOH can be directly applied to attract and trap phosphate from water reservoirs, thus contributing to environmental solutions. The proposed technique can also be utilized to deposit larger areas, which could be suitable for practical applications.
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Affiliation(s)
- Rhushikesh Godbole
- Jeonju Center, Korea Basic Science Institute, Jeonju, Jeollabuk-do 54907, Republic of Korea
| | - Sei-Jin Lee
- Jeonju Center, Korea Basic Science Institute, Jeonju, Jeollabuk-do 54907, Republic of Korea
| | - Yang Soo Kim
- Jeonju Center, Korea Basic Science Institute, Jeonju, Jeollabuk-do 54907, Republic of Korea
| | - Hyung-Kee Seo
- School of Chemical Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Bo Kyoung Kim
- Jeonju Center, Korea Basic Science Institute, Jeonju, Jeollabuk-do 54907, Republic of Korea
| | - Hee-Suk Chung
- Jeonju Center, Korea Basic Science Institute, Jeonju, Jeollabuk-do 54907, Republic of Korea
| | - Sang-Hun Jeong
- Gwangju Center, Korea Basic Science Institute, 77 Yongbong-ro, Buk-gu, Gwangju 61168, Republic of Korea
| | - Dong-Yun Yoon
- Western Seoul Center, Korea Basic Science Institute, 150 Bugahyun-ro, Seoudaemun-gu, Seoul 03759, Republic of Korea
| | - Ha-Jin Lee
- Department of Chemistry, Seoul Women's University, 621 Hwarangro, Nowon-Gu, Seoul 01797, Republic of Korea
| | - Jong Bae Park
- Jeonju Center, Korea Basic Science Institute, Jeonju, Jeollabuk-do 54907, Republic of Korea
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Maia MA, Dotto GL, Perez-Lopez OW, Gutterres M. Phosphate removal from industrial wastewaters using layered double hydroxides. ENVIRONMENTAL TECHNOLOGY 2021; 42:3095-3105. [PMID: 31975636 DOI: 10.1080/09593330.2020.1722257] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
In the present study, Mg-Al and Zn-Al layered double hydroxides (LDH) were synthesized by the co-precipitation method and employed to remove phosphate from synthetic aqueous solutions and industrial wastewaters. LDH were characterized by X-ray diffraction (XRD), N2 adsorption/desorption isotherms (BET method), thermal analyses (TG-DTA) and Fourier transform infrared spectroscopy (FTIR). XRD and TG-DTA analysis showed that Mg-Al and Zn-Al formed the LDH structure. Experimental adsorption data indicated that pseudo-second order model best described phosphate adsorption kinetics. Data of equilibrium experiments fitted well to Sips and Freundlich models for Mg-Al and Zn-Al, respectively. The effect of co-existing anions on the phosphate adsorption capacity was analyzed by utilizing industrial wastewater. The results showed that the phosphate removal decreases in the presence of other anions. Mg-Al adsorbent exhibited 74% removal of phosphate with a dosage of 5 g/L in industrial wastewater.
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Affiliation(s)
- Marina Avena Maia
- Laboratory for Leather and Environmental Studies - LACOURO, Department of Chemical Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
- Laboratory of Catalytic Processes - PROCAT, Department of Chemical Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Guilherme L Dotto
- Department of Chemical Engineering, Federal University of Santa Maria, UFSM, Santa Maria, Brazil
| | - Oscar W Perez-Lopez
- Laboratory of Catalytic Processes - PROCAT, Department of Chemical Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Mariliz Gutterres
- Laboratory for Leather and Environmental Studies - LACOURO, Department of Chemical Engineering, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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Li S, Zeng W, Ren Z, Jia Z, Wu G, Peng Y. Performance difference of hydrated phosphorophilic metal oxides in modifying diatomite and recovering phosphorus from wastewater. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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15
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Yang X, Wei Y, Jiang Y, Wang Y, Chen L, Peng L, Zhang S, Yan Y, Yan Y. High Efficiency Phosphate Removal Was Achieved by Lanthanum-Modified Mesoporous Silica Aerogels with Cellulose-Guided Templates. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05590] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xinyan Yang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yunmei Wei
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yinhua Jiang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yunyun Wang
- School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212013, P. R.China
| | - Li Chen
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Long Peng
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Shen Zhang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yan Yan
- Institute for Advanced Materials, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
| | - Yongsheng Yan
- Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P. R. China
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Xia M, Gao R, Wang Y, Wang S, Yun Y, Dou J. Synthesis and phosphate adsorption behaviour of Mg/Al-pillared montmorillonite loaded with La(OH) 3. ENVIRONMENTAL TECHNOLOGY 2021; 42:1652-1668. [PMID: 31580789 DOI: 10.1080/09593330.2019.1675775] [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: 08/06/2019] [Accepted: 09/28/2019] [Indexed: 06/10/2023]
Abstract
Magnesium/aluminum-pillared montmorillonite loaded with lanthanum hydroxide (Mg/Al-MMT-La(OH)3) was synthesized using non-toxic raw materials by ion-exchange and co-precipitation for phosphate removal from wastewater. Some adsorbents were fabricated in different molar ratios of Mg to Al, analyzed using various characterizations, and investigated in batch adsorption experiments. The determined adsorption kinetics of the 1:4 Mg/Al-MMT-La(OH)3 composite fitted well with the Elovich model. In addition, the Langmuir model revealed the high adsorption efficiency of phosphate by the adsorbent with a maximum adsorption capacity of 79.33 mg/g. The negative value of ΔG° and positive value of ΔH° (64.25 kJ/mol) demonstrated that phosphate adsorption onto 1:4 Mg/Al-MMT-La(OH)3 was spontaneous and endothermic in nature. Moreover, when the molar ratio of PO43- to CO32- was 1:5, the phosphate adsorption capacity reduced by 53.5%, far exceeding the effect of NO2-, NO3-, Cl-, and SO42-. The addition of Al3+ caused a sharp decline in phosphate removal property by 81.9% when PO43-/Al3+ molar ratio was 1:5, however, the presence of other cations showed the negligible impact on it. The adsorption mechanism primarily involved ion exchange with intercalated anions and surface coordination with loaded hydroxides. Results proved that 1:4 Mg/Al-MMT-La(OH)3 material has a favourable application potential in the surface water remediation.
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Affiliation(s)
- Meng Xia
- College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
- Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
| | - Ran Gao
- Department of Chemical and Environmental Engineering, University of Arizona, Tucson, AZ, USA
| | - Yingying Wang
- College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
- Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
| | - Shengrui Wang
- College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
- Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
| | - Ying Yun
- College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
- Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
| | - Junfeng Dou
- College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
- Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, College of Water Sciences, Beijing Normal University, Beijing, People's Republic of China
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17
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Moustafa D, Mahmoud R, El-Salam HMA, Shehata N. Utilization of residual zinc–iron-layered double hydroxide after methyl orange management as a new sorbent for wastewater treatment. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-020-01632-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Wang Y, Yang X, Jing X, Dai J, Dong M, Yan Y. Adsorption of phosphorus on lanthanum doped carbon films guided by self-assembly of cellulose nanocrystalline. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114148] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Suzaimi ND, Goh PS, Ismail AF, Mamah SC, Malek NANN, Lim JW, Wong KC, Hilal N. Strategies in Forward Osmosis Membrane Substrate Fabrication and Modification: A Review. MEMBRANES 2020; 10:E332. [PMID: 33171847 PMCID: PMC7695145 DOI: 10.3390/membranes10110332] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/01/2020] [Accepted: 11/04/2020] [Indexed: 01/13/2023]
Abstract
Forward osmosis (FO) has been recognized as the preferred alternative membrane-based separation technology for conventional water treatment technologies due to its high energy efficiency and promising separation performances. FO has been widely explored in the fields of wastewater treatment, desalination, food industry and bio-products, and energy generation. The substrate of the typically used FO thin film composite membranes serves as a support for selective layer formation and can significantly affect the structural and physicochemical properties of the resultant selective layer. This signifies the importance of substrate exploration to fine-tune proper fabrication and modification in obtaining optimized substrate structure with regards to thickness, tortuosity, and porosity on the two sides. The ultimate goal of substrate modification is to obtain a thin and highly selective membrane with enhanced hydrophilicity, antifouling propensity, as well as long duration stability. This review focuses on the various strategies used for FO membrane substrate fabrication and modification. An overview of FO membranes is first presented. The extant strategies applied in FO membrane substrate fabrications and modifications in addition to efforts made to mitigate membrane fouling are extensively reviewed. Lastly, the future perspective regarding the strategies on different FO substrate layers in water treatment are highlighted.
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Affiliation(s)
- Nur Diyana Suzaimi
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor 81310, Malaysia; (N.D.S.); (P.S.G.); (A.F.I.); (S.C.M.); (K.C.W.)
| | - Pei Sean Goh
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor 81310, Malaysia; (N.D.S.); (P.S.G.); (A.F.I.); (S.C.M.); (K.C.W.)
| | - Ahmad Fauzi Ismail
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor 81310, Malaysia; (N.D.S.); (P.S.G.); (A.F.I.); (S.C.M.); (K.C.W.)
| | - Stanley Chinedu Mamah
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor 81310, Malaysia; (N.D.S.); (P.S.G.); (A.F.I.); (S.C.M.); (K.C.W.)
- Department of Chemical Engineering, Alex Ekwueme Federal University, Ebonyi State 84001, Nigeria
| | - Nik Ahmad Nizam Nik Malek
- Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, Johor 81310, Malaysia;
| | - Jun Wei Lim
- Department of Fundamental and Applied Sciences, HICoE-Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia;
| | - Kar Chun Wong
- Advanced Membrane Technology Research Centre, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, Johor 81310, Malaysia; (N.D.S.); (P.S.G.); (A.F.I.); (S.C.M.); (K.C.W.)
| | - Nidal Hilal
- NYUAD Water Research Center, New York University Abu Dhabi, Abu Dhabi 129188, UAE
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20
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Suzaimi ND, Goh PS, Malek NANN, Lim JW, Ismail AF. Enhancing the performance of porous rice husk silica through branched polyethyleneimine grafting for phosphate adsorption. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.06.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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21
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Akram M, Xu X, Gao B, Yue Q, Yanan S, Khan R, Inam MA. Adsorptive removal of phosphate by the bimetallic hydroxide nanocomposites embedded in pomegranate peel. J Environ Sci (China) 2020; 91:189-198. [PMID: 32172967 DOI: 10.1016/j.jes.2020.02.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 02/01/2020] [Accepted: 02/02/2020] [Indexed: 06/10/2023]
Abstract
This study aimed to fabricate new and effective material for the efficiency of phosphate adsorption. Two types of adsorbent materials, the zirconium hydroxides embedded in pomegranate peel (Zr/Peel) and zirconium-lanthanum hydroxides embedded in pomegranate peel (Zr-La/Peel) were developed. Scanning electronic microscopy (SEM), x-ray photoelectron spectroscopy (XPS) and x-ray diffraction (XRD) were evaluated to give insight into the physicochemical properties of these adsorbents. Zr-La/Peel exceeded the adsorption efficiency of Zr/Peel adsorbents in batch adsorption experiments at the same pH level. The peel as a host can strive to have a strong "shielding effect" to increase the steadiness of the entrenched Zr and La elements. La and Zr are hydroxide metals that emit many hydrogen ions during the hydrolysis reaction, which contribute to protonation and electrostatic attraction. The highest adsorption capacity of La-Zr/Peel for phosphate was calculated to be 40.21 mg/g, and pseudo second-order equation is very well fitted for kinetic adsorption. Phosphate adsorption efficiency was reduced by an increase of pH. With the background of coexisting Cl-, little effect on adsorption efficiency was observed, while adsorption capacities were reduced by almost 20-30% with the coexistence of [Formula: see text] , [Formula: see text] and humic acid (HA).
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Affiliation(s)
- Muhammad Akram
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China
| | - Xing Xu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China
| | - Baoyu Gao
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China.
| | - Qinyan Yue
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China
| | - Shang Yanan
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266200, China
| | - Rizwan Khan
- Department of Chemical Engineering, Quaid-e-Awam University of Engineering, Science and Technology (QUEST), Nawabshah 67480, Sindh, Pakistan
| | - Muhammad Ali Inam
- Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST) H-12 Campus, Islamabad 44000, Pakistan
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22
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Leyva-Díaz JC, Monteoliva-García A, Martín-Pascual J, Munio MM, García-Mesa JJ, Poyatos JM. Moving bed biofilm reactor as an alternative wastewater treatment process for nutrient removal and recovery in the circular economy model. BIORESOURCE TECHNOLOGY 2020; 299:122631. [PMID: 31902639 DOI: 10.1016/j.biortech.2019.122631] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 12/12/2019] [Accepted: 12/15/2019] [Indexed: 06/10/2023]
Abstract
Over the last years, an increasing concern has emerged regarding the eco-friendly management of wastewater. Apart from the role of wastewater treatment plants (WWTPs) for wastewater and sewage sludge treatment, the increasing need of the recovery of the resources contained in wastewater, such as nutrients and water, should be highlighted. This would allow for transforming a wastewater treatment plant (WWTP) into a sustainable technological system. The objective of this review is to propose a moving bed biofilm reactor (MBBR) as a novel technology that contributes to the circularity of the wastewater treatment sector according to the principles of circular economy. In this regard, this paper aims to consider the MBBR process as the initial step for water reuse, and nutrient removal and recovery, within the circular economy model.
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Affiliation(s)
- J C Leyva-Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, 33006 Oviedo, Spain.
| | - A Monteoliva-García
- Department of Civil Engineering, University of Granada, 18071 Granada, Spain
| | - J Martín-Pascual
- Department of Civil Engineering, University of Granada, 18071 Granada, Spain
| | - M M Munio
- Department of Chemical Engineering, University of Granada, 18071 Granada, Spain
| | - J J García-Mesa
- Department of Chemical Engineering, University of Granada, 18071 Granada, Spain
| | - J M Poyatos
- Department of Civil Engineering, University of Granada, 18071 Granada, Spain
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23
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Liu Y, Qin L, Cheng Z, Goetze JW, Kong F, Fan JA, Fan LS. Near 100% CO selectivity in nanoscaled iron-based oxygen carriers for chemical looping methane partial oxidation. Nat Commun 2019; 10:5503. [PMID: 31796744 PMCID: PMC6890731 DOI: 10.1038/s41467-019-13560-0] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 11/07/2019] [Indexed: 11/28/2022] Open
Abstract
Chemical looping methane partial oxidation provides an energy and cost effective route for methane utilization. However, there is considerable CO2 co-production in current chemical looping systems, rendering a decreased productivity in value-added fuels or chemicals. In this work, we demonstrate that the co-production of CO2 can be dramatically suppressed in methane partial oxidation reactions using iron oxide nanoparticles embedded in mesoporous silica matrix. We experimentally obtain near 100% CO selectivity in a cyclic redox system at 750–935 °C, which is a significantly lower temperature range than in conventional oxygen carrier systems. Density functional theory calculations elucidate the origins for such selectivity and show that low-coordinated lattice oxygen atoms on the surface of nanoparticles significantly promote Fe–O bond cleavage and CO formation. We envision that embedded nanostructured oxygen carriers have the potential to serve as a general materials platform for redox reactions with nanomaterials at high temperatures. Chemical looping methane partial oxidation is an effective technology to produce syngas with a minimal energy penalty. Here, the authors design and develop a mesoporous silica supported nanoparticle oxygen carrier that enables a near 100% CO generation with high recyclability and substantially lower operating temperature.
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Affiliation(s)
- Yan Liu
- Department of Chemical and Biomolecular Engineering, The Ohio State University, 151W Woodruff Ave, Columbus, OH, 43210, USA
| | - Lang Qin
- Department of Chemical and Biomolecular Engineering, The Ohio State University, 151W Woodruff Ave, Columbus, OH, 43210, USA
| | - Zhuo Cheng
- Department of Chemical and Biomolecular Engineering, The Ohio State University, 151W Woodruff Ave, Columbus, OH, 43210, USA
| | - Josh W Goetze
- Department of Chemical and Biomolecular Engineering, The Ohio State University, 151W Woodruff Ave, Columbus, OH, 43210, USA
| | - Fanhe Kong
- Department of Chemical and Biomolecular Engineering, The Ohio State University, 151W Woodruff Ave, Columbus, OH, 43210, USA
| | - Jonathan A Fan
- Department of Electrical Engineering, Ginzton Laboratory, Spilker Engineering and Applied Sciences, Stanford University, 348 Via Pueblo Mall, Stanford, CA, 94305, USA
| | - Liang-Shih Fan
- Department of Chemical and Biomolecular Engineering, The Ohio State University, 151W Woodruff Ave, Columbus, OH, 43210, USA.
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24
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Jing X, Wang Y, Chen L, Wang Y, Yang X, Jiang Y, Yan Y. Free-standing large-mesoporous silica films decorated with lanthanum as new adsorbents for efficient removal of phosphate. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111815] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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25
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Karthikeyan P, Meenakshi S. Synthesis and characterization of Zn–Al LDHs/activated carbon composite and its adsorption properties for phosphate and nitrate ions in aqueous medium. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111766] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Karthikeyan P, Meenakshi S. In-situ fabrication of zirconium entrenched biopolymeric hybrid membrane for the removal of toxic anions from aqueous medium. Int J Biol Macromol 2019; 141:1199-1209. [PMID: 31518621 DOI: 10.1016/j.ijbiomac.2019.09.075] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/08/2019] [Accepted: 09/09/2019] [Indexed: 11/15/2022]
Abstract
The eutrophication of water bodies resulting from the excessive amounts of phosphate and nitrate ions in the water systems will cause serious environmental problems. This study deals with the adsorptive removal of toxic anions from aqueous medium using zirconium entrenched chitosan-starch membrane (Zr-CS-ST). The optimization of several influencing key factors like adsorbent dosage, shaking time, solution pH, aggressive ions, zero point charge and temperature were examined by batch mode adsorption experiments. In addition, Freundlich isotherm model showed an outstanding fit with the experimental data's, yielding the maximum adsorption capacities of 86.28 and 70.88 mg/g for phosphate and nitrate, respectively. Thermodynamic parameters, including the Gibbs free energy, entropy and enthalpy change indicated that the removal of both anions by Zr-CS-ST membrane was feasible, spontaneity and endothermic in nature. The diffusion and reaction based kinetic models were exposed to study about the kinetics and adsorption process were followed by pseudo-second-order and intra-particle diffusion kinetic models. The removal mechanism involved by different types of interactions such as complexation, ion exchange and electrostatic interaction, which were adopted for the removal mechanisms. We exposed that, Zr-CS-ST was successfully developed and will be effectively employed for the remediation of phosphate and nitrate ions in field/practical applications.
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Affiliation(s)
- Perumal Karthikeyan
- Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, 624 302 Dindigul, Tamil Nadu, India
| | - Sankaran Meenakshi
- Department of Chemistry, The Gandhigram Rural Institute - Deemed to be University, Gandhigram, 624 302 Dindigul, Tamil Nadu, India.
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27
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Kobayashi T, Pruski M. Spatial Distribution of Silica-Bound Catalytic Organic Functional Groups Can Now Be Revealed by Conventional and DNP-Enhanced Solid-State NMR Methods. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02017] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Takeshi Kobayashi
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
| | - Marek Pruski
- Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States
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28
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Li Y, Fu F, Cai W, Tang B. Synergistic effect of mesoporous feroxyhyte nanoparticles and Fe(II) on phosphate immobilization: Adsorption and chemical precipitation. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.01.075] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Lanthanum (III) encapsulated chitosan-montmorillonite composite for the adsorptive removal of phosphate ions from aqueous solution. Int J Biol Macromol 2018; 112:284-293. [DOI: 10.1016/j.ijbiomac.2018.01.138] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 01/08/2018] [Accepted: 01/19/2018] [Indexed: 11/23/2022]
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30
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Huang W, Zhang Y, Li D. Adsorptive removal of phosphate from water using mesoporous materials: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 193:470-482. [PMID: 28249762 DOI: 10.1016/j.jenvman.2017.02.030] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 02/08/2017] [Accepted: 02/12/2017] [Indexed: 05/20/2023]
Abstract
Mesoporous materials have significant potential for use as adsorbents for removal of phosphate from water. The chemical and structural properties of materials greatly affect their capacity and rate in the phosphate adsorption process. This paper reviews recent activities in the development of mesoporous materials as phosphate adsorbents. In particular, it mainly focuses on the synthesis, properties and phosphate removal efficiency of various materials with mesoporosity, including metal-coordinated amino-functionalized silicas, ammonium-functionalized silicas, metal-doped mesoporous silicas, metal oxides, metal sulfate and carbon.
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Affiliation(s)
- Weiya Huang
- School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China; Department of Materials Science and Engineering, Taizhou University, Linhai, 317000, China
| | - Yuanming Zhang
- Department of Chemistry, Jinan University, Guangzhou, 510632, China.
| | - Dan Li
- School of Engineering and Information Technology, Murdoch University, Murdoch, Western Australia, 6150, Australia.
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31
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Abou El-Anwar EA, Mekky H, Abd El Rahim S, Aita S. Mineralogical, geochemical characteristics and origin of Late Cretaceous phosphorite in Duwi Formation (Geble Duwi Mine), Red Sea region, Egypt. EGYPTIAN JOURNAL OF PETROLEUM 2017; 26:157-169. [DOI: 10.1016/j.ejpe.2016.01.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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32
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Ye Y, Ngo HH, Guo W, Liu Y, Li J, Liu Y, Zhang X, Jia H. Insight into chemical phosphate recovery from municipal wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 576:159-171. [PMID: 27783934 DOI: 10.1016/j.scitotenv.2016.10.078] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/11/2016] [Accepted: 10/11/2016] [Indexed: 05/24/2023]
Abstract
Phosphate plays an irreplaceable role in the production of fertilizers. However, its finite availability may not be enough to satisfy increasing demands for the fertilizer production worldwide. In this scenario, phosphate recovery can effectively alleviate this problem. Municipal wastewater has received high priority to recover phosphate because its quantity is considerable. Therefore, phosphate recovery from municipal wastewater can bring many benefits such as relieving the burden of increasing production of fertilizers and reduction in occurrence of eutrophication caused by the excessive concentration of phosphate in the released effluent. The chemical processes are the most widely applied in phosphate recovery in municipal wastewater treatment because they are highly stable and efficient, and simple to operate. This paper compares chemical technologies for phosphate recovery from municipal wastewater. As phosphate in the influent is transferred to the liquid and sludge phases, a technical overview of chemical phosphate recovery in both phases is presented with reference to mechanism, efficiency and the main governing parameters. Moreover, an analysis on their applications at plant-scale is also presented. The properties of recovered phosphate and its impact on crops and plants are also assessed with a discussion on the economic feasibility of the technologies.
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Affiliation(s)
- Yuanyao Ye
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia; Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China.
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Yiwen Liu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia
| | - Jixiang Li
- Shanghai Advanced Research Institute, Chinese Academy of Science, Zhangjiang Hi-Tech Park, Pudong, Shanghai, China.
| | - Yi Liu
- Shanghai Advanced Research Institute, Chinese Academy of Science, Zhangjiang Hi-Tech Park, Pudong, Shanghai, China
| | - Xinbo Zhang
- Department of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26, Tianjin 300384, China
| | - Hui Jia
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
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Zhang Q, Teng J, Zou G, Peng Q, Du Q, Jiao T, Xiang J. Efficient phosphate sequestration for water purification by unique sandwich-like MXene/magnetic iron oxide nanocomposites. NANOSCALE 2016; 8:7085-93. [PMID: 26961506 DOI: 10.1039/c5nr09303a] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Rationally tailored intercalation for two-dimensional (2D) layered MXene materials has aroused extraordinary enthusiasm for broadening their applications. Herein, a novel sandwiched structural 2D MXene-iron oxide (MXI) material, prepared by selectively exfoliating an Al layer followed by magnetic ferric oxide intercalation, exhibits remarkable applicability to trace phosphate sequestration in the environmental remediation realm. Compared with commercial adsorbents, the resultant MXI nanocomposite exhibits a fast separation in 120 s together with the superior treatment capacities of 2100 kg and 2400 kg per kg in simulated and real phosphate wastewater applications, respectively. Such efficient sequestration is ascribed to the formation of a unique nano-ferric oxide morphology. The ultrafine nano-Fe2O3 particles can intercalate into the interior layers of MXene, widening the layer distance, and stimulating the available overlapping activated layers; while the efficient phosphate removal can be achieved by the strong complexation onto the embedded magnetic nano-Fe3O4 with a unique sandwich-structure as well as the stimulated Ti-O terminal within MXene. Apart from the fact that this approach suggests a complementary means for environmental remediation, it opens a new trajectory to achieve the functionalization of MXene.
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Affiliation(s)
- Qingrui Zhang
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, China. zhangqr@ ysu.edu.cn
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Johir MAH, Pradhan M, Loganathan P, Kandasamy J, Vigneswaran S. Phosphate adsorption from wastewater using zirconium (IV) hydroxide: Kinetics, thermodynamics and membrane filtration adsorption hybrid system studies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 167:167-174. [PMID: 26686069 DOI: 10.1016/j.jenvman.2015.11.048] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 10/18/2015] [Accepted: 11/23/2015] [Indexed: 06/05/2023]
Abstract
Excessive phosphate in wastewater should be removed to control eutrophication of water bodies. The potential of employing amorphous zirconium (Zr) hydroxide to remove phosphate from synthetic wastewater was studied in batch adsorption experiments and in a submerged membrane filtration adsorption hybrid (MFAH) reactor. The adsorption data satisfactorily fitted to Langmuir, pseudo-first order and pseudo-second order models. Langmuir adsorption maxima at 22 °C and pHs of 4.0, 7.1, and 10.0 were 30.40, 18.50, and 19.60 mg P/g, respectively. At pH 7.1 and temperatures of 40 °C and 60 °C, they were 43.80 and 54.60 mg P/g, respectively. The thermodynamic parameters, ΔG° and ΔS° were negative and ΔH° was positive. FTIR, zeta potential and competitive phosphate, sulphate and nitrate adsorption data showed that the mechanism of phosphate adsorption was inner-sphere complexation. In the submerged MFAH reactor experiment, when Zr hydroxide was added at doses of 1-5 g/L once only at the start of the experiment, the removal of phosphate from 3 L of wastewater containing 10 mg P/L declined after 5 h of operation. However, when Zr hydroxide was repeatedly added at 5 g/L dose every 24 h, satisfactory removal of phosphate was maintained for 3 days.
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Affiliation(s)
- M A H Johir
- Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia
| | - M Pradhan
- Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia
| | - P Loganathan
- Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia
| | - J Kandasamy
- Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia
| | - S Vigneswaran
- Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia.
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Liu H, Guo W, Liu Z, Li X, Wang R. Effective adsorption of phosphate from aqueous solution by La-based metal–organic frameworks. RSC Adv 2016. [DOI: 10.1039/c6ra24568d] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, lanthanide-based metal–organic frameworks (La-MOFs) were prepared by a hydrothermal method and employed for the adsorption of phosphate from water.
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Affiliation(s)
- Hua Liu
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- China
| | - Weilin Guo
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- China
| | - Zhonghua Liu
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- China
| | - Xianghui Li
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- China
| | - Ruiqin Wang
- School of Resources and Environment
- University of Jinan
- Jinan 250022
- China
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Removal of phosphate anions using the modified chitosan beads: Adsorption kinetic, isotherm and mechanism studies. POWDER TECHNOL 2015. [DOI: 10.1016/j.powtec.2015.02.055] [Citation(s) in RCA: 233] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Lu J, Liu H, Zhao X, Jefferson W, Cheng F, Qu J. Phosphate removal from water using freshly formed Fe–Mn binary oxide: Adsorption behaviors and mechanisms. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.04.034] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yang K, Yan LG, Yang YM, Yu SJ, Shan RR, Yu HQ, Zhu BC, Du B. Adsorptive removal of phosphate by Mg–Al and Zn–Al layered double hydroxides: Kinetics, isotherms and mechanisms. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2013.12.042] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Transition-Metal-Catalyzed Transformation of Monosaccharides and Polysaccharides. POLYSACCHARIDES 2014. [DOI: 10.1007/978-3-319-03751-6_76-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Emmanuelawati I, Yang J, Zhang J, Zhang H, Zhou L, Yu C. Low-cost and large-scale synthesis of functional porous materials for phosphate removal with high performance. NANOSCALE 2013; 5:6173-80. [PMID: 23727929 DOI: 10.1039/c3nr01574b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A facile spray drying technique has been developed for large-scale and template-free production of nanoporous silica with controlled morphology, large pore size, and high pore volume, using commercially available fumed silica, Aerosil 200, as a sole precursor. This approach can be applied to the preparation of functional nanoporous materials, in this study, lanthanum oxide functionalised silica microspheres by introducing lanthanum nitrate in situ during the spray drying process and followed by a post-calcination process. The resultant lanthanum functionalised Aerosil microspheres manifest high phosphate adsorption capacity (up to 2.317 mmol g(-1)), fast kinetics, and excellent adsorption performance at a low phosphate concentration (1 mg L(-1)). In virtue of the easy and scalable synthesis method, low cost and high performances of the product, the materials we reported here are promising for water treatment. Our approach may be general and extended to the synthesis of other functional nanoporous materials with versatile applications.
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Affiliation(s)
- Irene Emmanuelawati
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
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Biological Removal of Phosphate at Low Concentrations Using Recombinant Escherichia coli Expressing Phosphate-Binding Protein in Periplasmic Space. Appl Biochem Biotechnol 2013; 171:1170-7. [DOI: 10.1007/s12010-013-0187-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 03/05/2013] [Indexed: 11/26/2022]
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Patra AK, Dutta A, Bhaumik A. Self-assembled mesoporous γ-Al2O3 spherical nanoparticles and their efficiency for the removal of arsenic from water. JOURNAL OF HAZARDOUS MATERIALS 2012; 201-202:170-177. [PMID: 22169241 DOI: 10.1016/j.jhazmat.2011.11.056] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 11/16/2011] [Accepted: 11/17/2011] [Indexed: 05/31/2023]
Abstract
We report a highly efficient synthetic strategy for self-assembled mesoporous γ-Al(2)O(3) materials using sodium salicylate as template. The mesoporous γ-Al(2)O(3) samples synthesized following this strategy have high surface areas (231-497 m(2)g(-1)), consist of crystalline tiny spherical nanoparticles of dimensions ca. 2-10nm and showed high affinity for the adsorption of arsenic from the contaminated aqueous solutions. Efficient synthesis strategy, exceptionally high surface area and high adsorption efficiency of these mesoporous γ-Al(2)O(3) materials for the dissolved arsenic from the contaminated aqueous solutions (in the form of oxyanions of arsenic) could find potential utility in the purification of polluted water.
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Affiliation(s)
- Astam K Patra
- Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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McManamon C, Burke AM, Holmes JD, Morris MA. Amine-functionalised SBA-15 of tailored pore size for heavy metal adsorption. J Colloid Interface Sci 2011; 369:330-7. [PMID: 22209347 DOI: 10.1016/j.jcis.2011.11.063] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 11/03/2011] [Accepted: 11/27/2011] [Indexed: 11/18/2022]
Abstract
This study examines the synthesis of SBA-15 with tailored pore sizes through controlled thermal treatment for the adsorption of Pb and Cd ions. The aim is to produce a material that can adsorb heavy metals at both high and low concentrations. The materials were characterised by means of N(2) physisorption, powder X-ray diffraction (PXRD), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), microanalysis and transmission electron microscopy (TEM). The surface areas ranged from 410 to 871 m(2)g(-1), and pore diameter was increased from 5.9 to 10.8 nm. This method allows for maximum adsorption of metal ions at very low concentrations. Metal ion adsorption was determined using an Atomic Absorption Spectrophotometer. The effects of pH were found to play a major role in the precipitation and, therefore, adsorption of metal ions. This method proved to be efficient at adsorbing large quantities of both metals (39 and 41 mg g(-1) for Pb and Cd, respectively).
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Affiliation(s)
- Colm McManamon
- Department of Chemistry, Supercritical Fluid Centre and Materials Section, University College Cork, Cork, Ireland
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Effect of pH, ionic strength, and temperature on the phosphate adsorption onto lanthanum-doped activated carbon fiber. J Colloid Interface Sci 2011; 364:490-6. [DOI: 10.1016/j.jcis.2011.08.067] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 08/22/2011] [Accepted: 08/26/2011] [Indexed: 11/19/2022]
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Benreguia N, Omeiri S, Bellal B, Trari M. Visible light induced H2PO(4)(-) removal over CuAlO2 catalyst. JOURNAL OF HAZARDOUS MATERIALS 2011; 192:1395-1400. [PMID: 21782331 DOI: 10.1016/j.jhazmat.2011.06.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 05/23/2011] [Accepted: 06/20/2011] [Indexed: 05/31/2023]
Abstract
The delafossite CuAlO(2) is successfully used for the visible light driven H(2)PO(4)(-) reduction. It is prepared from the nitrates decomposition in order to increase the ratio of reaction surface per given mass. CuAlO(2) is a narrow band gap semiconductor which exhibits a good chemical stability with a corrosion rate of 1.70 μmol year(-1) at neutral pH. The flat band potential (+0.25 V(SCE)) is determined from the Mott-Schottky characteristic. Hence, the conduction band, positioned at (-1.19 V(SCE)), lies below the H(2)PO(4)(-) level yielding a spontaneous reduction under visible illumination. The photocatalytic process is investigated under mild conditions and 30% conversion occurs in less than ~6h with a quantum efficiency of 0.04% under full light. The concentration decreases by a factor of 39% after a second cycle. The photoactivity follows a first order kinetic with a rate constant of 6.6 × 10(-2)h(-1). The possibility of identifying the reaction products via the intensity-potential characteristics is explored. The decrease of the conversion rate over illumination time is due to the competitive water reduction.
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Affiliation(s)
- N Benreguia
- Laboratory of Storage and Valorization of Renewable Energies, Faculty of Chemistry, (U.S.T.H.B), BP 32, 16111 Algiers, Algeria
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