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Hu Y, Li Y, Du Y, Zhao B, Chen M, Tian X, Chen S, Fan M, Zhang H. Adsorption and recovery of phosphate using sodium carbonate as co-precipitant synthesized La&Zr dual-metal modified material: Adsorption mechanism and practical application. CHEMOSPHERE 2024; 363:142878. [PMID: 39032732 DOI: 10.1016/j.chemosphere.2024.142878] [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: 04/28/2024] [Revised: 07/05/2024] [Accepted: 07/15/2024] [Indexed: 07/23/2024]
Abstract
Adsorption methods offer efficient recovery of phosphorus from water bodies. Modification adsorption materials combining lanthanum (La) and zirconium (Zr) dual-metal immobilized via co-precipitation method have been widely applied in the adsorption and recovery of phosphate. Meanwhile, sodium carbonate (Na2CO3) is gradually replacing sodium hydroxide (NaOH) as the mainstream co-precipitant for immobilizing metals into supporting matrices due to its excellent performance and environmental friendliness. However, the adsorption mechanisms of materials synthesized with different co-precipitants and the synergistic effects between dual-metal components are not well understood, which is not conducive to the further optimization of dual-metal adsorption materials. In this study, anion exchange resin was utilized as the supporting matrices, and La&Zr dual-metal-modified materials, La&Zr-CO32- and La&Zr-OH-, were prepared using Na2CO3 and NaOH as co-precipitants, respectively. The results indicate that La&Zr-CO32- exhibits superior performance in phosphate adsorption and recovery, with adsorption capacity and recovery efficiency reaching 36.28 mg/g and 82.59%, respectively. Additionally, this material demonstrates strong stability in reuse, phosphate selectivity, and a wide pH applicability range. La&Zr-CO32- achieves phosphate adsorption through surface electrostatic affinity, ligand exchange, and intraspherical complexation, whereas La&Zr-OH- primarily relies on electrostatic adsorption on the surface and interior of the material. Synergistic effects between La and Zr result in enhanced adsorption performance of the dual-metal material compared to individual metals. Specifically, phosphate adsorption is predominantly governed by La, while the presence of Zr further enhances ligand exchange between lattice oxygen and metals. Simultaneously, Zr doping enhances the phosphate recovery capacity and reusability of the materials. Continuous flow adsorption results from actual water bodies demonstrate that La&Zr-CO32- is more suitable for the removal and recovery of phosphate in water treatment engineering. This study provides a theoretical basis and technical support for the adsorption and recovery of phosphate using dual-metal-modified materials.
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Affiliation(s)
- Yuansi Hu
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Yao Li
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Yuhao Du
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Bing Zhao
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Mengli Chen
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Xiaogang Tian
- Sichuan Academy of Eco-Environmental Sciences, Chengdu, 610000, China
| | - Sikai Chen
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Meikun Fan
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Han Zhang
- School of Environmental Science and Engineering, Southwest Jiaotong University, Chengdu 611756, China.
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2
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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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3
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Sheng X, Chen S, Zhao Z, Li L, Zou Y, Shi H, Shao P, Yang L, Wu J, Tan Y, Lai X, Luo X, Cui F. Metal element-based adsorbents for phosphorus capture: Chaperone effect, performance and mechanism. CHEMOSPHERE 2024; 352:141350. [PMID: 38309601 DOI: 10.1016/j.chemosphere.2024.141350] [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: 11/17/2023] [Revised: 01/24/2024] [Accepted: 01/30/2024] [Indexed: 02/05/2024]
Abstract
Excessive phosphorus (P) enters the water bodies via wastewater discharges or agricultural runoff, triggering serious environmental problems such as eutrophication. In contrast, P as an irreplaceable key resource, presents notable supply-demand contradictions due to ineffective recovery mechanisms. Hence, constructing a system that simultaneously reduce P contaminants and effective recycling has profound theoretical and practical implications. Metal element-based adsorbents, including metal (hydro) oxides, layered double hydroxides (LDHs) and metal-organic frameworks (MOFs), exhibit a significant chaperone effect stemming from strong orbital hybridization between their intrinsic Lewis acid sites and P (Lewis base). This review aims to parse the structure-effect relationship between metal element-based adsorbents and P, and explores how to optimize the P removal properties. Special emphasis is given to the formation of the metal-P chemical bond, which not only depends on the type of metal in the adsorbent but also closely relates to its surface activity and pore structure. Then, we delve into the intrinsic mechanisms behind these adsorbents' remarkable adsorption capacity and precise targeting. Finally, we offer an insightful discussion of the prospects and challenges of metal element-based adsorbents in terms of precise material control, large-scale production, P-directed adsorption and effective utilization.
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Affiliation(s)
- Xin Sheng
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
| | - Shengnan Chen
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
| | - Zhiwei Zhao
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
| | - Li Li
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China.
| | - Yuanpeng Zou
- School of Foreign Languages and Cultures, Chongqing University, 400044, PR China
| | - Hui Shi
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Penghui Shao
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Liming Yang
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Jingsheng Wu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
| | - Yaofu Tan
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
| | - Xinyuan Lai
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
| | - Xubiao Luo
- National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang, 330063, PR China; School of Life Science, Jinggangshan University, Ji'an, 343009, PR China
| | - Fuyi Cui
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, College of Environment and Ecology, Chongqing University, Chongqing, 400045, PR China
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4
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Chen A, Wang X, Hu R, Wei X, Lv L, Shen T, Wang J, Xing S, Yuan C. Construction of 3D network aluminum sludge-based hydrogel beads: combination of macroization, amino functionalization, and resource utilization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:12052-12070. [PMID: 38225498 DOI: 10.1007/s11356-024-31825-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/29/2023] [Indexed: 01/17/2024]
Abstract
An aluminum sludge-based composite material was constructed against the problems of phosphorus pollution and the waste of aluminum sludge resources. Utilizing metal Ce doping and hydrogel microbeads with pore preparation, the adsorption performance of the original sludge was improved. Meanwhile, the macroscopic body was constructed, and on this basis, polyethyleneimine (PEI) was introduced to complete the amino functionalization further to enhance the adsorption of phosphorus by the adsorbent, and NH-CeAIS-10 microbeads were successfully prepared. In adsorption, microbeads with larger specific surface area and richer functional groups are better choice compared to original sludge. The results of SEM, BET, FT-IR, and XPS analyses indicate that the adsorption of phosphorus by the microbeads is mainly achieved through electrostatic interactions, ligand exchange, and the formation of inner-sphere complexes. According to the Langmuir model, the maximum phosphorus adsorption capacity of NH-CeAIS-10 was 29.56 mg g-1, which was four times higher compared to native aluminum sludge. This also confirms the significant enhancement of phosphorus adsorption through the modification of aluminum sludge. Besides, in dynamic adsorption column experiments, the material exhibited up to 99% removal in simulated wastewater for up to 30 days, demonstrating the great adsorption potential of NH-CeAIS-10 in engineering applications.
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Affiliation(s)
- Aixia Chen
- School of Water and Environment, Chang'an University, Xi'an, 710054, China.
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China.
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China.
| | - Xinyuan Wang
- School of Water and Environment, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China
| | - Ruirui Hu
- Shaanxi Hydrotransformer Technology Co., Ltd, Xi'an, China
| | - Xiao Wei
- School of Water and Environment, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China
| | - Luxue Lv
- School of Water and Environment, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China
| | - Tong Shen
- School of Water and Environment, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China
| | - Jinzhou Wang
- School of Water and Environment, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China
| | - Shanshan Xing
- School of Water and Environment, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China
| | - Chunbo Yuan
- School of Water and Environment, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of the Ministry of Education, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Eco-Hydrology and Water Security in Arid and Semi-Arid Regions of Ministry of Water Resources, Chang'an University, Xi'an, 710054, China
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5
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Zhang Y, Qin J, Chen Z, Chen Y, Zheng X, Guo L, Wang X. Efficient removal and recovery of phosphorus from industrial wastewater in the form of vivianite. ENVIRONMENTAL RESEARCH 2023; 228:115848. [PMID: 37024026 DOI: 10.1016/j.envres.2023.115848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/20/2023] [Accepted: 04/03/2023] [Indexed: 05/16/2023]
Abstract
With the shortage of phosphorus resources, the concept of phosphorus recovery from wastewater is generally proposed. Recently, phosphorus recovery from wastewater in the form of vivianite has been widely reported, which could be used as a slow-release fertilizer as well as the production of lithium iron phosphate for Li-ion batteries. In this study, chemical precipitation thermodynamic modeling was applied to evaluate the effect of solution factors on vivianite crystallization with actual phosphorus containing industrial wastewater. The modeling results showed that the solution pH influences the concentration of diverse ions, and the initial Fe2+ concentration affects the formation area of vivianite. The saturation index (SI) of vivianite increased with the initial Fe2+ concentration and Fe:P molar ratio. pH 7.0, initial Fe2+ concentration 500 mg/L and Fe:P molar ratio 1.50 were the optimal conditions for phosphorus recovery. Mineral Liberation Analyzer (MLA) accurately determined the purity of vivianite was 24.13%, indicating the feasibility of recovering vivianite from industrial wastewater. In addition, the cost analysis showed that the cost of recovering phosphorus by the vivianite process was 0.925 USD/kg P, which can produce high-value vivianite products and realize "turn waste into treasure".
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Affiliation(s)
- Yangzhong Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Jiafu Qin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Zhenguo Chen
- School of Environment, South China Normal University, Guangzhou, 510006, China; Hua An Biotech Co., Ltd., Foshan, 528300, China.
| | - Yongxing Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Xuwen Zheng
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Hua An Biotech Co., Ltd., Foshan, 528300, China.
| | - Lu Guo
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
| | - Xiaojun Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Hua An Biotech Co., Ltd., Foshan, 528300, China.
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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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7
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Sang M, Weng J, Chen X, Nie G. Renewable cellulose aerogel embedded with nano-HFO for preferable phosphate capture from aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:26613-26624. [PMID: 36371568 DOI: 10.1007/s11356-022-24087-1] [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: 07/06/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Excess phosphate in water can cause eutrophication, which must be addressed. Despite many efforts devoted to the adsorptive removal of phosphate from water, the development of new adsorbents with high adsorption capacity is highly desirable. Herein, a novel nanocomposite was proposed for phosphate removal by confining hydrated ferric oxide (HFO) nanoparticles into a cellulose aerogel (CA) network named as HFO@CA. Benefiting from the characteristics of the low density and porous structure of CA, the internal surface of the nanocomposite is more accessible and thus improves the utilization of the HFO nanoparticles. Batch adsorption experiments were carried out to evaluate the phosphate uptake by the prepared adsorbent. The maximum adsorption capacity of HFO@CA occurs at near-acidic pH. With increasing temperature, the composite adsorbent is more favorable for phosphate adsorption. Moreover, the hybrid aerogel exhibited fast kinetic behavior for phosphate removal, which could be accurately depicted by pseudo-second-order model. HFO@CA shows excellent adsorption selectivity in solutions containing competitive anions at higher levels. In addition, five cycles of the phosphate adsorption experiments without obvious capacity loss indicated that HFO@CA has great regenerability. These results demonstrate that HFO@CA has a wide field of application with good prospects in phosphate removal from wastewater, which also provides a new strategy to prepare adsorbents with excellent performance using renewable cellulose resources.
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Affiliation(s)
- Min Sang
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Jingyi Weng
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Xiaoxuan Chen
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Guangze Nie
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211816, China.
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8
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Shi Y, Wang X, Qing Z, Song Y, Min J, Zhou Y, Du J, Wang S. Using Iron Tailings for Phosphate Removal in Cemented Phosphogypsum (PG) Backfill. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8497. [PMID: 36499991 PMCID: PMC9741477 DOI: 10.3390/ma15238497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/22/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
Compared with the post-treatment of pollutants, such as the removal of phosphate from wastewater, it is more important to develop effective emission control strategies to reduce phosphate pollution. Phosphogypsum (PG) is a typical solid waste byproduct of phosphate production and contains high amounts of residual phosphate. In order to control the phosphate emissions during the recycling of PG aggregates for cemented backfill, another solid waste product—iron tailings (ITs)—was added during the preparation of backfill slurry. The results showed that the ITs effectively accelerated the phosphate removal in cemented PG backfill, enabling the quick reduction in the phosphate concentration to the discharge standard (<0.5 mg/L) within 15 min. This means that the emissions of phosphate to bleeding water were effectively controlled. The adsorption experiment showed that phosphate was adsorbed by the ITs, and the adsorption data fitted well with the Langmuir adsorption model (R2 = 0.98) and pseudo-second-order kinetic model (R2 = 0.99), indicating that the phosphate adsorption of ITs was a monolayer chemical adsorption. Furthermore, an unconfined compressive strength (UCS) test was performed on the backfill with the addition of ITs. Compared to the control group (without ITs), the UCS of backfill with 20% ITs increased from 1.08 MPa to 1.33 MPa, indicating that the addition of solid waste could be beneficial to the strength development of the backfill by mitigating the interference of phosphate with the hydration process. The backfill cured for 28 d was selected for the toxic leaching test, and the phosphate concentration in the leachates was always below 0.02 mg/L, indicating that ITs can effectively immobilize phosphate in backfill for a long time.
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Affiliation(s)
- Ying Shi
- School of Resources and Safety Engineering, Central South University, Changsha 410083, China
| | - Xiaolin Wang
- School of Resources and Safety Engineering, Central South University, Changsha 410083, China
| | - Zixuan Qing
- School of Resources and Safety Engineering, Central South University, Changsha 410083, China
| | - Yanmei Song
- School of Resources and Safety Engineering, Central South University, Changsha 410083, China
| | - Jie Min
- School of Resources and Safety Engineering, Central South University, Changsha 410083, China
| | - Yanan Zhou
- School of Resources and Safety Engineering, Central South University, Changsha 410083, China
| | - Jing Du
- School of Materials Engineering, Changshu Institute of Technology, Changshu 215500, China
- Suzhou Sinoma Design and Research Institute of Non-Metallic Minerals Industry Co., Ltd., Suzhou 215151, China
| | - Shaofeng Wang
- School of Resources and Safety Engineering, Central South University, Changsha 410083, China
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9
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Xu Z, Zhong Y, Wang Y, Song X, Huang W. Removal performance and mechanism of phosphorus by different Fe-based layered double hydroxides. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:74591-74601. [PMID: 35639317 DOI: 10.1007/s11356-022-21047-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
Phosphorus pollution has the potential to cause both aquatic eutrophication and global phosphorus scarcity. Fe-based layered double hydroxides (LDHs) have received much attention due to their high phosphorus adsorption and recovery. The composition of Fe-based LDHs is an important factor in determining their adsorption performance. However, the mechanism by which single component regulation of Fe-based LDHs affects phosphorus adsorption performance remains unknown. In this study, two typical types of Fe-based LDHs were prepared: Mg/Fe LDH and Zn/Fe LDH. Results showed that the equilibrium adsorption capacity of Zn/Fe LDH was much greater than that of Mg/Fe LDH, reaching 65.85 mg/g with a phosphorus concentration of 150 mg/L. Calcination facilitated a substantial increase of adsorption capacity for Mg/Fe LDH rather than Zn/Fe LDH. Meanwhile, the phosphorus removal efficiency of Fe-based LDHs both exceeded 90% with an initial pH of 3.0, but it decreased as pH increased, and pH inhibition was relatively weaker for Zn/Fe LDH than Mg/Fe LDH. The common coexisting anions caused a phosphorus adsorption loss, with SO42- possessing the most competition with phosphorus. Combined with FTIR, XRD, XPS, and BET analyses, a superior adsorption performance of Zn/Fe-LDH over Mg/Fe-LDH was probably attributed to a higher surface complexation and larger specific surface area. It was also concluded that Fe-based LDHs are a promising method for removing phosphorus from recirculating aquaculture wastewater.
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Affiliation(s)
- Zhongshuo Xu
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201600, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Yueheng Zhong
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201600, China
| | - Yuhui Wang
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201600, China
| | - Xinshan Song
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201600, China
| | - Wei Huang
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201600, China.
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10
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Chloride intercalated Ni-Al layered double hydroxide for effective adsorption removal of Sb(Ⅴ). INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Wang S, Bai P, Cichocka MO, Cho J, Willhammar T, Wang Y, Yan W, Zou X, Yu J. Two-Dimensional Cationic Aluminoborate as a New Paradigm for Highly Selective and Efficient Cr(VI) Capture from Aqueous Solution. JACS AU 2022; 2:1669-1678. [PMID: 35911457 PMCID: PMC9326818 DOI: 10.1021/jacsau.2c00237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Water pollutants existing in their oxyanion forms have high solubility and environmental mobility. To capture these anionic pollutants, cost-effective inorganic materials with cationic frameworks and outstanding removal performance are ideal adsorbents. Herein, we report that two-dimensional (2D) cationic aluminoborate BAC(10) sets a new paradigm for highly selective and efficient capture of Cr(VI) and other oxyanions from aqueous solution. The structure of Cr(VI)-exchanged BAC(10) sample (Cr(VI)@BAC(10), H0.22·Al2BO4.3·(HCrO4)0.22·2.64H2O) has been successfully solved by continuous rotation electron diffraction. The crystallographic data show that the 2D cationic layer of BAC(10) is built by AlO6 octahedra, BO4 tetrahedra, and BO3 triangles. Partial chromate ions exchanged with Cl- ions are located within the interlayer region, which are chemically bonded to the aluminoborate layer. BAC(10) shows faster adsorption kinetics compared to the commercial anion exchange resin (AER) and layered double hydroxides (LDHs), a higher maximum adsorption capacity of 139.1 mg/g than that of AER (62.77 mg/g), LDHs (81.43 mg/g), and a vast majority of cationic MOFs, and a much broader working pH range (2-10.5) than LDHs. Moreover, BAC(10) also shows excellent Cr(VI) oxyanion removal performance for a solution with a low concentration (1-10 mg/L), and the residual concentration can be reduced to below 0.05 mg/L of the WHO drinking water criterion. These superior properties indicate that BAC(10) is a promising material for remediation of Cr(VI) and other harmful oxyanions from wastewater.
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Affiliation(s)
- Shuang Wang
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- College
of Chemistry and Chemical Engineering, Henan Province Function-Oriented
Porous Materials Key Laboratory, Luoyang
Normal University, 6
Jiqing Road, Luoyang 471934, P.R. China
| | - Pu Bai
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Magdalena Ola Cichocka
- Department
of Materials and Environmental Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
| | - Jung Cho
- Department
of Materials and Environmental Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
| | - Tom Willhammar
- Department
of Materials and Environmental Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
| | - Yunzheng Wang
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Wenfu Yan
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Xiaodong Zou
- Department
of Materials and Environmental Chemistry, Stockholm University, Stockholm SE-106 91, Sweden
| | - Jihong Yu
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- International
Center of Future Science, Jilin University, 2699 Qianjin Street, Changchun 130012, P.R. China
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12
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Qin J, Zhang C, Chen Z, Wang X, Zhang Y, Guo L. Converting wastes to resource: Utilization of dewatered municipal sludge for calcium-based biochar adsorbent preparation and land application as a fertilizer. CHEMOSPHERE 2022; 298:134302. [PMID: 35304209 DOI: 10.1016/j.chemosphere.2022.134302] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/28/2022] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Pyrolysis combined with land application for dewatered municipal sludge disposal revealed advantages in heavy metals solidification and resource utilization compared with other disposal technologies. In this study, utilizing dewatered municipal sludge for calcium-containing porous adsorbent preparation via pyrolysis was proposed and verified. After pyrolyzing at 900 ° C (Ca-900), the dewatered sludge obtained maximum adsorption capacity (83.95 mg P⋅ g-1) and the adsorption process conformed to the pseudo-second-order model and double layer model. Characteristic analysis showed the predominant adsorption mechanism was precipitation. Continuous column bed experiment indicated 2 g adsorbent could remove 4.27 mg phosphorus from tail wastewater with the initial phosphorus concentration of 1.03 mg ⋅ L-1. No heavy metals leaching was observed from Ca-900 adsorbent with pH value exceeding 1.0, and merely 1% addition of Ca-900 adsorbent (after actual water phosphorus adsorption) with soil could extremely promote the early growth of seedlings. Economic estimates demonstrated that this cost-effective modification could generate the most add-on value production. Based on these results, the strategy of 'one treatment but two uses' was proposed in this study, converting the wastes to resource and providing a native strategy for sludge disposal and resource recovery.
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Affiliation(s)
- Jiafu Qin
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Chuchu Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Zhenguo Chen
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Xiaojun Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, China.
| | - Yangzhong Zhang
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
| | - Lu Guo
- School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China
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13
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Parasana N, Shah M, Unnarkat A. Recent advances in developing innovative sorbents for phosphorus removal-perspective and opportunities. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:38985-39016. [PMID: 35304717 DOI: 10.1007/s11356-022-19662-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
Phosphorus is an essential mineral for the growth of plants which is supplied in the form of fertilizers. Phosphorus remains an inseparable part of developing agrarian economics. Phosphorus enters waterways through three different sources: domestic, agricultural, and industrial sources. Rainfall is the main cause for washing away a large amount of phosphates from farm soils into nearby waterways. The surplus of phosphorus in the water sources cause eutrophication and degradation of the habitat with an adverse effect on aquatic life and plants. Phosphate elimination is necessary to control eutrophication in water sources. Among the different methods reported for the removal and recovery of phosphorus: ion exchange, precipitation, crystallization, and others, adsorption standout as a sustainable solution. The current review offers a comparative assessment of the literature on novel materials and techniques for the removal of phosphorus. Herein, different adsorbents, their behaviors, mechanisms, and capacity of materials are discussed in detail. The adsorbents are categorized under different heads: iron-based, silica-alumina-based, calcium-based, biochar-based wherein the metal and metal oxides are employed in phosphorus removal. The ideal attribute of adsorbent will be the utilization of spent adsorbents as a phosphate plant food and a soil conditioner in agriculture. The review provides the perspective on the current research with potential challenges and directives for possible research in the field.
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Affiliation(s)
- Nautam Parasana
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, Raisan, Gandhinagar, Gujarat, 382007, India
| | - Manan Shah
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, Raisan, Gandhinagar, Gujarat, 382007, India
| | - Ashish Unnarkat
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Energy University, Raisan, Gandhinagar, Gujarat, 382007, India.
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14
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Tao Y, Liu S, Dong S, Wang C, Qu T, Li S, Li L, Ma Z. An in situ grown amorphous ZrO 2 layer on zeolite for enhanced phosphate adsorption. RSC Adv 2022; 12:16751-16762. [PMID: 35754910 PMCID: PMC9170381 DOI: 10.1039/d2ra01967a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 05/19/2022] [Indexed: 12/11/2022] Open
Abstract
Zeolite supported amorphous metal oxide nanolayers with high specific surface area, abundant adsorption sites, and excellent reusability hold a bright prospect in the efficient removal of contaminants, yet it is proven to be still challenging to precisely regulate and control their synthesis. Herein, we reported a facile synthetic strategy for rational design and achieving the uniform and firm in situ growth of an amorphous ZrO2 layer decorated on the surface of zeolite (ZEO@AZ) for enhanced phosphate adsorption. The Langmuir isotherm model and pseudo-second order kinetic equation well described the adsorption process towards phosphate solution, and the synthetized ZEO@AZ exhibited an excellent maximum adsorption amount of 24.98 mgP g-1. Furthermore, the adsorption of phosphates on ZEO@AZ was confirmed to be chemisorption, endothermic and spontaneous. This approach for fabricating amorphous metal oxide nanolayers on a robust matrix may provide a new route for constructing composites with superb phosphate adsorption performance.
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Affiliation(s)
- Ying Tao
- College of Mining, Liaoning Technical University Fuxin 123000 P. R. China
- School of Metallurgy Engineering, Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore, Liaoning Institute of Science and Technology Benxi 117004 P. R. China
| | - Shaojia Liu
- School of Chemistry, Beihang University Beijing 100191 P. R. China
| | - Shizhi Dong
- College of Mining, Liaoning Technical University Fuxin 123000 P. R. China
| | - Chengguo Wang
- School of Metallurgy Engineering, Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore, Liaoning Institute of Science and Technology Benxi 117004 P. R. China
| | - Tao Qu
- School of Metallurgy Engineering, Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore, Liaoning Institute of Science and Technology Benxi 117004 P. R. China
| | - Sinan Li
- School of Metallurgy Engineering, Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore, Liaoning Institute of Science and Technology Benxi 117004 P. R. China
| | - Lingling Li
- School of Metallurgy Engineering, Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore, Liaoning Institute of Science and Technology Benxi 117004 P. R. China
| | - Zhuang Ma
- College of Mining, Liaoning Technical University Fuxin 123000 P. R. China
- School of Metallurgy Engineering, Liaoning Key Laboratory of Optimization and Utilization of Non-associated Low-grade Iron Ore, Liaoning Institute of Science and Technology Benxi 117004 P. R. China
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15
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Lv N, Li X, Qi X, Ren Y. Calcium-modified granular attapulgite removed phosphorus from synthetic wastewater containing low-strength phosphorus. CHEMOSPHERE 2022; 296:133898. [PMID: 35134405 DOI: 10.1016/j.chemosphere.2022.133898] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 01/17/2022] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Traditional biological processes combined with chemical precipitation methods can effectively reduce phosphate concentration in wastewater. However, discharge standards required additional advanced treatment technologies, and the removal of low phosphorus concentration is complicated and expensive. This study proposes application of a simple and recyclable adsorbent to remove low-concentration phosphorus from water. The removal efficiency of phosphorus from low-strength synthetic wastewater was investigated and the adsorption mechanism was analyzed. When the initial phosphorus concentration was 2.0 mg/L, the phosphorus adsorption capacity of Ca-GAT increased to 0.891 mg/g from 0.074 mg/g for GAT at 298 K and pH of 7. Phosphorus adsorption on Ca-GAT performs well when the solution pH is in the range of 5-10, and it is not conducive to the adsorption reaction when the solution pH exceeds 11. The competing anions (such as NO3-, SO42-, HCO3- and F-) existed, Ca-GAT still performed better in removing phosphorus. Then, the saturated absorbents could be effectively regenerated with a 0.5 mos/L NaOH solution, while desorption efficiency was reduced from 97.11% to 33.06% after fifth regeneration cycle. Finally, Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the Ca2+ content on the Ca-GAT surface played an important role in capturing phosphate ions from wastewater. Phosphorus was mainly removed via the formation of Ca-phosphorus precipitation. To some extent, ligand exchanges of CO32- and OH- with HPO42- and H2PO4- were also beneficial for phosphorus removal. The present work shows that attapulgite has sustainable and beneficial potential in the removal of low-strength phosphorous in wastewater, and the phosphorus loaded adsorbent can be used in the agriculture as slow-release fertilizer.
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Affiliation(s)
- Na Lv
- Laboratory of Environmental Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, 214122, PR China; Jiangsu Cooperative Innovation Center of Technology and Material of Water Treatment, Suzhou, 215009, PR China
| | - Xiufen Li
- Laboratory of Environmental Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, 214122, PR China; Jiangsu Cooperative Innovation Center of Technology and Material of Water Treatment, Suzhou, 215009, PR China.
| | - Xiguang Qi
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, PR China
| | - Yueping Ren
- Laboratory of Environmental Biotechnology, School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, 214122, PR China; Jiangsu Cooperative Innovation Center of Technology and Material of Water Treatment, Suzhou, 215009, PR China
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16
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Cui J, Li J, Cui J, Wang W, Wu Y, Xu B, Chang Y, Liu X, Li H, Yao D. Removal effects of a biomass bottom ash composite on tailwater phosphate and its application in a rural sewage treatment plant. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 812:152549. [PMID: 34952069 DOI: 10.1016/j.scitotenv.2021.152549] [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: 10/09/2021] [Revised: 12/15/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Tailwater phosphate from sewage treatment plants and biomass bottom ash (BA) from power plants has become a global concern for the sustainable environmental development and resource management. However, there are large gaps in the understanding of the removal mechanisms and application conditions of BA on tailwater phosphate. In this study, the removal effect and mechanism of BA and its composites were fully discussed using a series of experiments, including adsorption, desorption, characterization, and incubation experiments. It was found that the combination of BA and red soil at a rate of 4:1 (CBA) could remove 92.44% of phosphate from tailwater in 3-10 h. Its adsorption process was well fitted by the pseudo-second-order kinetic and Freundlich isotherm adsorption models. The mechanism of phosphate adsorption primarily included ligand exchange, physical adsorption, chemical precipitation, electrostatic attraction, and ion exchange. The CBA could be used as a better substrate for constructed wetlands because it was effective under wide application conditions, which varying pH values (4.0-8.0), initial concentrations of tailwater phosphate (0.5-5.0 mg L-1), and even extreme temperatures (heat and cold). Moreover, Hippuris vulgaris L. was optimized and combined with the CBA to deeply remove 57.45-76.06% of phosphate from a rural sewage treatment plant. The phosphate concentration after treatment could reach below the limit values of the Grade III or IV standard (GB 3838-2002), though the CBA contained and released phosphate. This study can help provide a recycling route for both BA and tailwater phosphate resources, extend the industrial chain of biomass power plants, and improve the surrounding water environment.
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Affiliation(s)
- Jian Cui
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China
| | - Jinfeng Li
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China
| | - Jianwei Cui
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China
| | - Wei Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China
| | - Yue Wu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China
| | - Bin Xu
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Nanjing 210042, China
| | - Yajun Chang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China
| | - Xiaojing Liu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China
| | - Hua Li
- Anhui Guozhen Eco-tech Co., Ltd., Fuyang 236072, China
| | - Dongrui Yao
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, China; Jiangsu Engineering Research Center of Aquatic Plant Resources and Water Environment Remediation, Nanjing 210014, China.
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17
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Keyikoglu R, Khataee A, Yoon Y. Layered double hydroxides for removing and recovering phosphate: Recent advances and future directions. Adv Colloid Interface Sci 2022; 300:102598. [PMID: 35007948 DOI: 10.1016/j.cis.2021.102598] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/23/2021] [Accepted: 12/30/2021] [Indexed: 01/18/2023]
Abstract
Eutrophication is a widespread environmental challenge caused by excessive phosphate. Thus, wastewater engineers primarily aim to limit the phosphate concentration in water bodies. Layered double hydroxides (LDHs) are lamellar inorganic materials containing tunable brucite-like structures. This review discusses the fundamental aspects and latest developments in phosphate removal using LDH-based materials. Based on the divalent cations, Ca, Mg, and Zn-containing LDHs are largely used along with trivalent cations such as Al and Fe owing to their limited toxicities. However, classical LDHs are affected by the presence of co-existing anions, have a narrow working pH range, and have moderate adsorption capacities. Binary LDHs have been designed to be selective towards phosphate by the addition of a third metal such as Zr4+. Developing LDH composites with magnetic, polymeric or carbon materials are feasible approaches for increasing adsorption capacity, stability, and reusability of LDHs. Biochar as a carrier material for LDHs achieved remarkable phosphate adsorption performance and improved LDH dispersion, anion exchange capacity, and ease of separation. The use of recovered phosphate as an SRF, which is a type of bioavailable fertilizer, is a promising approach.
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