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Çifçi Dİ. Diclofenac sodium and paracetamol removal with ZnCl 2 activated carbon produced from rice straw. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2024; 26:1847-1853. [PMID: 38794784 DOI: 10.1080/15226514.2024.2357644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
This study explored the efficacy of activated carbon derived from rice straw and treated with ZnCl2 (ZnCl2-RS) for the removal of diclofenac sodium (DCF) and paracetamol (PCM) through an adsorption process. The investigation included examining the variations in removal efficiency at different pH levels and ZnCl2-RS doses. The characteristics of the ZnCl2-RS, prepared for the study, were determined through SEM and FTIR analyses, revealing a composition of 49.4% carbon and 8.3% zinc. At pH 5, the adsorption efficiency for DCF and PCM was enhanced, achieving removal rates of 92.2% for DCF and 89.1% for PCM with 0.2 g of ZnCl2-RS. The adsorption of DCF and PCM by ZnCl2-RS followed pseudo-second-order kinetic and adhered to the Langmuir isotherm model. The maximum adsorption capacities were calculated as 26.04 mg/g for DCF and 19.05 mg/g for PCM. In conclusion, the cost-effective production of activated carbon from agricultural waste like rice straw yielded a promising adsorbent material for efficiently removing pharmaceuticals such as diclofenac sodium and paracetamol. This approach not only contributes to waste reduction but also promotes the repurposing of agricultural waste materials.
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Affiliation(s)
- Deniz İzlen Çifçi
- Faculty of Çorlu Engineering, Deparment of Environmental Engineering, Tekirdağ Namık Kemal University, Çorlu, Türkiye
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Uematsu Y, Ogata F, Okamoto R, Kabayama M, Kawasaki N. Phosphate recovery from aqueous phase using novel zirconium-based adsorbent. Heliyon 2024; 10:e29649. [PMID: 38665584 PMCID: PMC11044048 DOI: 10.1016/j.heliyon.2024.e29649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 04/01/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
This study aims to document the phosphate ion (PO43-) adsorption capacity of a novel zirconium-based adsorbent. The physicochemical properties of the adsorbent are investigated using an array of methods and metrics such as electron microscopy, X-ray diffraction, thermal analysis, specific surface area, pore volume, pH point of zero charge (pHpzc), and surface hydroxyl groups. The batch method is used to elucidate PO43- adsorption capacity. Results suggested that the adsorption of PO43- was based on an internal diffusion and a monolayer adsorption. We also clarified that the pH of the solution significantly impacted the adsorption. Moreover, the adsorbent shows the ability to not only adsorb but also desorb PO43- for at least five cycles, based on an adsorption mechanism that we document. These findings indicate that this adsorbent could serve as a major industrial PO43- adsorbent.
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Affiliation(s)
- Yugo Uematsu
- Faculty of Pharmacy, Kindai University, 3−4−1, Kowakae, Higashi−Osaka, Osaka, 577−8502, Japan
| | - Fumihiko Ogata
- Faculty of Pharmacy, Kindai University, 3−4−1, Kowakae, Higashi−Osaka, Osaka, 577−8502, Japan
| | - Riko Okamoto
- Faculty of Pharmacy, Kindai University, 3−4−1, Kowakae, Higashi−Osaka, Osaka, 577−8502, Japan
| | - Mineaki Kabayama
- BIRCH Lab., 214, Akinokamikamihonjyou, Seto−cho, Naruto, Tokushima, 771-0360, Japan
| | - Naohito Kawasaki
- Faculty of Pharmacy, Kindai University, 3−4−1, Kowakae, Higashi−Osaka, Osaka, 577−8502, Japan
- Antiaging Center, Kindai University, 3−4−1 Kowakae, Higashi−Osaka, Osaka, 577-8502, Japan
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El-Mehalmey WA, Ibrahim AH, Youssef AFA, Abuzalat O, Mousa MS, Mayhoub AS, Alkordi MH. Anion-Exchange Electrospun Mixed-Matrix Polymer Fibers of Colesevelam for Water Treatment. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 38109475 DOI: 10.1021/acsami.3c13473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Novel anion-exchange electrospun fiber membranes of polycaprolactone doped with the cationic, cross-linked colesevelam polymer are reported. The weight fraction of cross-linked cationic colesevelam polymer, as the active phase within the PCL matrix, can readily be controlled in the synthesis of the mixed-matrix fibers (Cole@PCL), enabling optimization of the ion-exchange properties of the resulted membranes. This approach enabled adaptation of anion-exchange resins to a permeable, flexible membrane form, which is a significant advancement toward futuristic water treatment applications, demonstrated herein for the removal of trace contaminants, including nitrates and phosphates, as well as anionic dyes. The Cole@PCL membranes demonstrated the dependence of contaminant uptake on the weight percentage of colesevelam in the mixed-matrix membrane. An optimal 10 wt % of colesevelam was identified, demonstrating a staggering ion removal capacity of 155.8 mg/g for nitrate, 177.6 mg/g for phosphate, and 70 mg/g for Methyl Orange.
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Affiliation(s)
- Worood A El-Mehalmey
- Center for Materials Science, Zewail City of Science and Technology, 6th of October, 12578 Giza, Egypt
| | - Ahmed H Ibrahim
- Center for Materials Science, Zewail City of Science and Technology, 6th of October, 12578 Giza, Egypt
| | - Ahmed Fahmy A Youssef
- Environmental Engineering Program, Zewail City of Science and Technology, 6th of October, 12578 Giza, Egypt
- Chemistry Department, Faculty of Science, Cairo University, 12612 Giza, Egypt
| | - Osama Abuzalat
- Department of Chemical Engineering, Military Technical College, 4393010 Cairo, Egypt
| | - Moustafa S Mousa
- Environmental Engineering Program, Zewail City of Science and Technology, 6th of October, 12578 Giza, Egypt
- Faculty of Engineering Mataria, Helwan University, 11795 Cairo, Egypt
| | - Abdelrahman S Mayhoub
- Center for Certified Standards, Zewail City of Science and Technology, 6th of October, 12578 Giza, Egypt
| | - Mohamed H Alkordi
- Center for Materials Science, Zewail City of Science and Technology, 6th of October, 12578 Giza, Egypt
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Ahmed AM, Mekonnen ML, Mekonnen KN. Polymer-based nanocomposite adsorbents for resource recovery from wastewater. RSC Adv 2023; 13:31687-31703. [PMID: 37908667 PMCID: PMC10613956 DOI: 10.1039/d3ra05453e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/16/2023] [Indexed: 11/02/2023] Open
Abstract
Developing mitigation mechanisms for eutrophication caused by the uncontrolled release of nutrients is in the interest of the scientific community. Adsorption, being operationally simple and economical with no significant secondary pollution, has proven to be a feasible technology for resource recovery. However, the utility of adsorption often lies in the availability of effective adsorbents. In this regard, polymer-based nanocomposite (PNC) adsorbents have been highly acclaimed by researchers because of their high surface area, multiple functional groups, biodegradability, and ease of large-scale production. This review paper elaborates on the functionality, adsorption mechanisms, and factors that affect the adsorption and adsorption-desorption cycles of PNC adsorbents toward nutrient resources. Moreover, this review gives insight into the application of recovered nutrient resources in soil amendment.
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Affiliation(s)
- Aminat Mohammed Ahmed
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University P.O. Box 16417 Addis Ababa Ethiopia
- Nanotechnology Centre of Excellence, Addis Ababa Science and Technology University P.O. Box 16417 Addis Ababa Ethiopia
- Department of Chemistry, College of Natural Sciences, Wollo University P.O. Box 1145, Dessie Ethiopia
| | - Menbere Leul Mekonnen
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University P.O. Box 16417 Addis Ababa Ethiopia
- Nanotechnology Centre of Excellence, Addis Ababa Science and Technology University P.O. Box 16417 Addis Ababa Ethiopia
| | - Kebede Nigussie Mekonnen
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University P.O. Box 16417 Addis Ababa Ethiopia
- Nanotechnology Centre of Excellence, Addis Ababa Science and Technology University P.O. Box 16417 Addis Ababa Ethiopia
- Department of Chemistry, College of Natural and Computational Sciences, Mekelle University P.O. Box 231 Mekelle Ethiopia
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Yuan M, Feng M, Guo C, Qiu S, Zhang K, Yang Z, Wang F. La-Ca/Fe-LDH-coupled electrochemical enhancement of organophosphorus removal in water: Organophosphorus oxidation improves removal efficiency. CHEMOSPHERE 2023; 336:139251. [PMID: 37331662 DOI: 10.1016/j.chemosphere.2023.139251] [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: 05/22/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/20/2023]
Abstract
Metal ions or metal (hydrogen) oxides are widely used as active sites in the construction of phosphate-adsorbing materials in water, but the removal of soluble organophosphorus from water remains technically difficult. Herein, synchronous organophosphorus oxidation and adsorption removal were achieved using electrochemically coupled metal-hydroxide nanomaterials. La-Ca/Fe-layered double hydroxide (LDH) composites prepared using the impregnation method removed both phytic acid (inositol hexaphosphate, IHP) and hydroxy ethylidene diphosphonic acid (HEDP) acid under an applied electric field. The solution properties and electrical parameters were optimized under the following conditions: organophosphorus solution pH = 7.0, organophosphorus concentration = 100 mg L-1, material dosage = 0.1 g, voltage = 15 V, and plate spacing = 0.3 cm. The electrochemically coupled LDH accelerates the removal of organophosphorus. The IHP and HEDP removal rates were 74.9% and 47%, respectively in only 20 min, 50% and 30% higher, respectively, than that of La-Ca/Fe-LDH alone. The removal rate in actual wastewater reached 98% in only 5 min. Meanwhile, the good magnetic properties of electrochemically coupled LDH allow easy separation. The LDH adsorbent was characterized using scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction analysis. It exhibits a stable structure under electric field conditions, and its adsorption mechanism mainly includes ion exchange, electrostatic attraction, and ligand exchange. This new approach for enhancing the adsorption capacity of LDH has broad application prospects in organophosphorus removal from water.
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Affiliation(s)
- Mingyao Yuan
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China; Dali Cimprehensive Experimental Station of Environment Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali, 671004, China
| | - Menghan Feng
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Dali Cimprehensive Experimental Station of Environment Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali, 671004, China
| | - Changbin Guo
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Dali Cimprehensive Experimental Station of Environment Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali, 671004, China
| | - Shangkai Qiu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Dali Cimprehensive Experimental Station of Environment Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali, 671004, China
| | - Keqiang Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Dali Cimprehensive Experimental Station of Environment Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali, 671004, China
| | - Zengjun Yang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Dali Cimprehensive Experimental Station of Environment Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali, 671004, China.
| | - Feng Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin, 300191, China; Dali Cimprehensive Experimental Station of Environment Protection Research and Monitoring Institute, Ministry of Agriculture and Rural Affairs, Dali, 671004, China.
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Pattappan D, Kapoor S, Islam SS, Lai YT. Layered Double Hydroxides for Regulating Phosphate in Water to Achieve Long-Term Nutritional Management. ACS OMEGA 2023; 8:24727-24749. [PMID: 37483187 PMCID: PMC10357453 DOI: 10.1021/acsomega.3c02576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 06/15/2023] [Indexed: 07/25/2023]
Abstract
Hunger and undernourishment are increasing global challenges as the world's population continuously grows. Consequently, boosting productivity must be implemented to reach the global population's food demand and avoid deforestation. The current promising agricultural practice without herbicides and pesticides is fertilizer management, particularly that of phosphorus fertilizers. Layered double hydroxides (LDHs) have recently emerged as favorable materials in phosphate removal, with practical application possibilities in nanofertilizers. This review discusses the fundamental aspects of phosphate removal/recycling mechanisms and highlights the current endeavors on the development of phosphate-selective sorbents using LDH-based materials. Specific emphasis is provided on the progress in designing LDHs as the slow release of phosphate fertilizers reveals their relevance in making agro-practices more ecologically sound. Relevant pioneering efforts have been briefly reviewed, along with a discussion of perspectives on the potential of LDHs as green nanomaterials to improve food productivity with low eco-impacts.
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Affiliation(s)
- Dhanaprabhu Pattappan
- Department
of Materials Engineering, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan, ROC
| | - Sakshi Kapoor
- Centre
for Nanoscience and Nanotechnology, Jamia
Millia Islamia (A Central University), New Delhi 110025, India
| | - Saikh Safiul Islam
- Centre
for Nanoscience and Nanotechnology, Jamia
Millia Islamia (A Central University), New Delhi 110025, India
| | - Yi-Ting Lai
- Department
of Materials Engineering, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan, ROC
- Center
for Plasma and Thin Film Technologies, Ming
Chi University of Technology, New Taipei City 24301, Taiwan, ROC
- Biochemical
Technology R&D Center, Ming Chi University
of Technology, New Taipei
City 24301, Taiwan, ROC
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Wei T, Zhang Z, Zhang G, Zhu J. Advanced removal of phosphate from water by a novel lanthanum manganese oxide: Performance and mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:62367-62375. [PMID: 36943569 DOI: 10.1007/s11356-023-26526-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 03/14/2023] [Indexed: 05/10/2023]
Abstract
A novel lanthanum manganese oxide (La0.96Mn0.96O3, LMO) was synthesized for advanced phosphate removal to alleviate water eutrophication process. The adsorbent had a specific surface area of 18.51 m2/g with pH at point of zero charge of 6.6; exhibited excellent phosphate adsorption capacity of 168.4 mg/g; performed well in a wide pH range from 3 to 10. The phosphate removal was not interfered by coexisting ions. The adsorbent remained 94.8% of its initial adsorption efficiency after reused for four times. Phosphate adsorption process conformed to pseudo-second-order model (R2=0.992) and Langmuir model (R2=0.935). Ligand exchange and electrostatic interaction played important roles in phosphate removal. In addition, the actual sewage secondary effluent was used to further verify the phosphate removal performance of LMO. For practical water treatment, the LMO showed high phosphate removal efficiency of 83.4% and low residual P of 0.1 mg/L. LMO is a potential candidate for low-concentration phosphate removal in real water environment.
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Affiliation(s)
- Ting Wei
- Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, China
| | - Zhongguo Zhang
- Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing, 100095, China
| | - Guangming Zhang
- School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300130, China.
| | - Jia Zhu
- School of Construction and Environment Engineering, Shenzhen Polytechnic, Shenzhen, 518055, China
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Hu Y, Liu S, Qiu M, Zheng X, Peng X, Dai H, Hu F, Xu L, Xu G, Zhu Y, Guo R. Lysine-functionalized layered double hydroxides for the antibiotics’ efficient removal: Controllable fabrication via BBD model and removing mechanism. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
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9
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Adil S, Kim JO. The effectiveness and adsorption mechanism of iron-carbon nanotube composites for removing phosphate from aqueous environments. CHEMOSPHERE 2023; 313:137629. [PMID: 36565757 DOI: 10.1016/j.chemosphere.2022.137629] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
This study successfully employed iron-carbon nanotubes (Fe-CNT) to recover phosphate (P) from water. We examined the effects of various iron concentrations denoted by Fe-CNT-1 and Fe-CNT-2 on P removal and compared them with pristine carbon nanotubes (CNTs). The adsorption capacity of Fe-CNTs was much better than pristine CNTs. According to the high adsorption capacity, Fe-CNT-2 sample was very effective for P recovery and exhibits ∼7 times higher P removal efficiency than that of pristine CNTs. The characterization of the as-obtained adsorbent (Fe-CNT-2) and pristine CNTs were performed using X-ray diffraction, Brunauer-Emmett-Teller method, Field emission scanning electron microscope coupled with energy-dispersive spectroscopy detector (FESEM-EDS), X-ray photoelectron spectroscopy and Transmission electron microscopy. Results demonstrated that iron oxide nanoparticles were successfully deposited on the surface of CNT. The adsorption kinetics and isotherm studies for P removal showed pseudo-second-order rate constants (R2 > 0.99) and the Langmuir isotherm (R2 > 0.99) respectively, thus revealing that the nature of adsorption was chemisorption. The estimated Langmuir adsorption capacity of Fe-CNT-2 was 36.5 mgP/g or 112 mg PO4/g at an equilibrium time of 3 h. The ionic strength provided by SO42-, NO3-, and Cl- demonstrated no considerable influence on phosphate adsorption. Moreover, the P adsorbed Fe-CNT-2 was efficiently recovered with different concentrations of desorbing reagents, such as NaOH and NaCO32-. Moreover, the findings of X-ray photoelectron spectroscopy (XPS) analysis demonstrated that OH group played a major role in the P removal by Fe-CNT-2. The findings of this study demonstrate that Fe-CNT-2 had a great deal of application as an effective and stable adsorbent for the P recovery from aquatic environments.
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Affiliation(s)
- Sawaira Adil
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
| | - Jong-Oh Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea.
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10
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Modification of activated carbon from agricultural waste lotus leaf and its adsorption mechanism of beryllium. KOREAN J CHEM ENG 2023. [DOI: 10.1007/s11814-022-1251-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Ahmed AM, Mekonnen ML, Mekonnen KN. Polymer-based nanocomposite adsorbents for resource recovery from wastewater. RSC Adv 2023; 13:31687-31703. [DOI: https:/doi.org/10.1039/d3ra05453e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2023] Open
Abstract
Adsorption is alternative technique for recovery of nutrient resources with no/less secondary pollution. PNC adsorbents are effective for removal and recovery of nutrient resources, and reusing nutrients as fertilizer could prevent eutrophication.
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Affiliation(s)
- Aminat Mohammed Ahmed
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
- Nanotechnology Centre of Excellence, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
- Department of Chemistry, College of Natural Sciences, Wollo University, P.O. Box 1145, Dessie, Ethiopia
| | - Menbere Leul Mekonnen
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
- Nanotechnology Centre of Excellence, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
| | - Kebede Nigussie Mekonnen
- Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
- Nanotechnology Centre of Excellence, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
- Department of Chemistry, College of Natural and Computational Sciences, Mekelle University, P.O. Box 231, Mekelle, Ethiopia
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Fan X, Wu Y, He Y, Liu H, Guo J, Li B, Peng H. Efficient removal of phosphorus by adsorption. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2022.2157828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaoyi Fan
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, P. R. China
| | - Yuting Wu
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, P. R. China
| | - Yao He
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, P. R. China
| | - Huaping Liu
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, P. R. China
| | - Jing Guo
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, P. R. China
| | - Bing Li
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, P. R. China
| | - Hao Peng
- Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing, P. R. China
- Chongqing Jiulongyuan High-tech Industry Group Co., Ltd, Chongqing, P. R. China
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Cheng H, He H, Zhang Z, Xiao K, Liu Y, Kang X, Li X. Adsorption sites and electron transfer characteristics of methyl orange on three-dimensional hierarchical flower-like nanostructures of Co-Al-layered double hydroxides: Experimental and DFT investigation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Chu L, Zhang C, Yu J, Sun X, Zhou X, Zhang Y. Adsorption of nitrate from interflow by the Mg/Fe calcined layered double hydroxides. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:511-529. [PMID: 35960834 DOI: 10.2166/wst.2022.224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Nitrate loss in interflow caused serious nitrate pollution of neighboring water bodies in the purple soil region of China's Sichuan Province. In this study, Mg/Fe(Al)-calcined layered double hydroxides (Mg/Fe(Al)-CLDHs) with varied Mg/Fe(Al) ratios were synthesized for nitrate removal from interflow, and 3:1 Mg/Fe CLDH exhibited the best adsorption performance. The effects of initial pH, adsorbent dosage and co-existing anions on the adsorption performance were investigated by batch experiments. The best-fitting kinetic and isothermal models for nitrate adsorption were the pseudo-second-order model and Freundlich model, respectively, indicating that the adsorption process was a physical-chemical multilayer process. The maximum adsorption capacity of nitrate was 73.36 mg/g, which was higher than that of many other commonly used adsorbents. The adsorbents were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscope (TEM) and Brunauer-Emmett-Teller (BET) techniques, and the XRD and FT-IR results revealed that the adsorption mechanism involved original layered structure reconstruction and ion-exchange interaction. Under the coexistence of SO42- and Cl-, 75.63% nitrate in interflow could be removed after 6 h of adsorption. Overall, the synthesized Mg/Fe CLDH is an effective and low-cost nitrate adsorbent for in-situ nitrate removal.
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Affiliation(s)
- Liquan Chu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Chaojie Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Jing Yu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Xu Sun
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Yalie Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China E-mail: ; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
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Su X, Chen Y, Li Y, Li J, Song W, Li X, Yan L. Enhanced adsorption of aqueous Pb(II) and Cu(II) by biochar loaded with layered double hydroxide: Crucial role of mineral precipitation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mg-Al Layered Double Hydroxide Doped Activated Carbon Composites for Phosphate Removal from Synthetic Water: Adsorption and Thermodynamics Studies. SUSTAINABILITY 2022. [DOI: 10.3390/su14126991] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Increased phosphate concentration in water bodies has led to eutrophication, and its removal is an inevitable requirement of sustainable wastewater purification systems. In this study, MgAl layered doubled hydroxide (LDH) composites doped on the surface of activated carbon (AC/MgAl LDH) with various (Mg + Al) total metal loading (5 wt%, 10 wt%, and 15 wt%) were prepared by the co-precipitation method. The influence of (Mg + Al) total metal loading onto AC was examined to remove phosphate ions from aqueous solutions. The effect of adsorption parameters, including adsorbent dosage, initial solution pH, initial phosphate concentration, contact time, and experiment temperature, were investigated via batch adsorption experiments. The adsorption results demonstrated that the phosphate adsorption capacity significantly improved with increasing the (Mg + Al) metal loading on the surface of AC. The maximum Langmuir phosphate adsorption capacity was 337.2 mg phosphate per gram of AC/MgAl-3 LDH composite (15 wt% Mg + Al) composite at pH ~6.3, 22 °C, and 1 g/L of adsorbent. The kinetic data were best fitted with the pseudo-second order model. The initial solution pH notably influenced the phosphate removal by AC/MgAl-3 LDH composite with a maximum removal at pH 2.3. According to the spent adsorbent characterization results, the dominant mechanisms of phosphate removal by AC/MgAl-3 LDH were electrostatic interactions, ion exchange, and inner-sphere complexation. The phosphate adsorption capacity was gradually increased with increasing the experiment temperature, suggesting an endothermic adsorption process. Overall, the AC/MgAl LDH composites pave the way for an effective strategy for phosphate removal from aqueous solutions.
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Highly efficient removal of aqueous Cu(II) and Cd(II) by hydrothermal synthesized CaAl-layered double hydroxide. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128584] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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18
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Liu Y, Zhang X, Wang J. A critical review of various adsorbents for selective removal of nitrate from water: Structure, performance and mechanism. CHEMOSPHERE 2022; 291:132728. [PMID: 34718027 DOI: 10.1016/j.chemosphere.2021.132728] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/23/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
Nitrate is ubiquitous pollutant due to its high water solubility, usually contributing to eutrophication, and posing a threat to aquatic ecosystem and human health. Adsorption approach has been widely used for nitrate removal because of the simplicity, easy operation, and low cost. Adsorbent plays a key role in the adsorptive removal of nitrate. The adsorption performance and adsorption mechanism are determined by the structural feature of adsorbent that is dependent on the preparation method. In this review, various types of adsorbents for nitrate removal were systematically summarized, their preparation, characterization, and adsorption performance were evaluated; the factors influencing the nitrate adsorption performance were discussed; the adsorption isotherm models, kinetic models and thermodynamic parameters were examined; and the possible adsorption mechanisms responsible for nitrate adsorption were categorized; the possible correlation of adsorbent structure to adsorption performance and adsorption mechanism were explained; the potential applications of adsorbents were discussed; finally, the strategies for improving adsorption capacity and selectivity towards nitrate, the challenges and future perspectives for developing novel adsorbent were also proposed. This review will deepen the understanding of nitrate removal by adsorption process and help the development of high-performance adsorbents for selective nitrate removal from water and wastewater.
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Affiliation(s)
- Yong Liu
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China; Key Laboratory of Treatment for Special Wastewater of Sichuan Province Higher Education Process, Sichuan, Chengdu, 610066, China
| | - Xuemei Zhang
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, China
| | - Jianlong Wang
- Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, China.
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Intachai S, Sumanatrakul P, Pankam P, Suppaso C, Khaorapapong N. Efficient Removal of Both Anionic and Cationic Dyes by Activated Carbon/NiFe-layered Double Oxide. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02254-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Li H, Cui S, Tan Y, Peng Y, Gao X, Yang X, Ma Y, He X, Fan B, Yang S, Chen Q. Synergistic effects of ball-milled biochar-supported exfoliated LDHs on phosphate adsorption: Insights into role of fine biochar support. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 294:118592. [PMID: 34856246 DOI: 10.1016/j.envpol.2021.118592] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 11/08/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Although biochar supports were widely adopted to fabricate the biochar (BC) supported layered double hydroxides (LDHs) composites (LDH-BC) for efficient environmental remediation, few studies focus on the important role of biochar support in alleviating the stacking of LDHs and enhancing LDH-BC's performance. Through the analysis of the material structure-performance relationship, the "support effect" of fine biochar prepared by ball milling was carefully explored. Compared with the original LDHs on LDH-BC, the LDHs on ball milled biochar (LDH-BMBC) had smaller particle size (from 1123 nm to 586 nm), crystallite size (from 20.5 nm to 6.56 nm), more abundant O-containing functional groups, and larger surface area (370 m2 g-1) and porous structure. The Langmuir model revealed that the maximum theoretical phosphate adsorption capacity of LDH-BMBC (56.2 mg P g-1) was significantly higher than that of LDH-BC (27.6 mg P g-1). The leaching experiment proved that the addition of LDH-BMBC in calcareous soil could significantly reduce the release of soil total phosphate (46.1%) and molybdate reactive phosphate (40.4%), even though pristine BC and BMBC significantly enhanced the soil phosphate leaching. This work fabricated high-performance and eco-friendly LDH-BMBC for phosphate adsorption in solution and phosphate retention in soil and also provide valuable insights into fine biochar support effect on LDHs exfoliation, extending the practical use of the engineered ball milled biochars in environment remediation.
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Affiliation(s)
- Hangyu Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Shihao Cui
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Yi Tan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Yutao Peng
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China; School of Agriculture, Sun Yat-sen University, Guangzhou, Guangdong, 510275, China
| | - Xing Gao
- State Key Laboratory for Pollution Control and Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, China
| | - Xiao Yang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yan Ma
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Xinyue He
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Beibei Fan
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Sen Yang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China
| | - Qing Chen
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
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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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22
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Kumar IA, Mezni A, Periyasamy S, Viswanathan N. Development of cerium-trimesic acid complexed 2D frameworks for effective nitrate and phosphate remediation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Recepoglu YK, Goren AY, Orooji Y, Khataee A. Carbonaceous materials for removal and recovery of phosphate species: Limitations, successes and future improvement. CHEMOSPHERE 2022; 287:132177. [PMID: 34826904 DOI: 10.1016/j.chemosphere.2021.132177] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/26/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
The carbonaceous materials have gained significant interest for the phosphorus species remediation and recovery in the last decade. Carbonaceous materials present many unique features, such as cost effective, availability, environmentally friendly, and high removal efficiency that make them a promising adsorbent. In this review, the recent application of carbonaceous materials including activated carbon (AC), graphene and graphene oxide (GO), lignin, carbon nanotubes (CNTs), and gC3N4 for phosphate removal and recovery were comprehensively summarized. The kinetics and isotherm models, removal mechanisms, and effects of operating parameters are reported. The reusability, lifetime of carbonaceous materials, and impact of modification were also considered. The modified carbonaceous materials have significantly high phosphate adsorption capacity compared to unmodified adsorbents. Namely, MgO-functionalized lignin-based bio-charcoal exhibited a 906.8 mg g-1 of capacity as the highest one among other reviewed materials. The modification of carbonaceous materials with various elements has been presented to improve the surface functional groups, surface area and charge, and pore volume and size. Among these loaded elements, iron has been effectively used to provide a prospect for magnetic recovery of the adsorbent as well as increase phosphate adsorption. Furthermore, the phosphate recovery methods, phosphate removal efficiency of carbonaceous materials, the limitations, important gaps in the literature, and future studies to enhance applicability of carbonaceous materials in real scale are also discussed.
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Affiliation(s)
- Yasar K Recepoglu
- Department of Chemical Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - A Yagmur Goren
- Department of Environmental Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Yasin Orooji
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran; Department of Environmental Engineering, Gebze Technical University, 41400, Gebze, Turkey.
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Liu L, Zhang C, Chen S, Ma L, Li Y, Lu Y. Phosphate adsorption characteristics of La(OH) 3-modified, canna-derived biochar. CHEMOSPHERE 2022; 286:131773. [PMID: 34375827 DOI: 10.1016/j.chemosphere.2021.131773] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 06/08/2021] [Accepted: 08/01/2021] [Indexed: 06/13/2023]
Abstract
La(OH)3-modified canna biochar (CBC-La) was prepared by a coprecipitation method (dipping method), and its phosphate adsorption characteristics were investigated. The results show that the pseudo-second-order kinetics and the Langmuir model can be used to describe the adsorption process with a high level of accuracy. Adsorption equilibrium could be reached at 8 h, at which point the maximum adsorption capacity was shown to be 37.37 mg/g. CBC-La has excellent phosphate adsorption capacity in the middle to low concentrations (≤50 mg/L), and its removal rate can exceed 99 %. CBC-La also has wide pH adaptability (3-9) and a strongly selective adsorption performance. Notably, it can still maintain a removal rate of over 99.8 % in the presence of certain anions (NO3-, HCO3-, and CO32-), and the presence of NH4+ has a synergistic effect on the adsorption process. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements demonstrate that the main mechanisms of CBC-La phosphate adsorption are electrostatic adsorption, ion exchange, ligand exchange and inner sphere complexation.
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Affiliation(s)
- LingYan Liu
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650091, China; School of Ecology and Environmental Science YNU, Yunnan University, Kunming, 650091, China
| | - ChunHong Zhang
- School of Ecology and Environmental Science YNU, Yunnan University, Kunming, 650091, China
| | - ShuangRong Chen
- School of Ecology and Environmental Science YNU, Yunnan University, Kunming, 650091, China
| | - Lan Ma
- Yunnan Academy of Science and Technology Development, Kunming, 650051, China
| | - YingMei Li
- School of Ecology and Environmental Science YNU, Yunnan University, Kunming, 650091, China
| | - YiFeng Lu
- School of Ecology and Environmental Science YNU, Yunnan University, Kunming, 650091, China.
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Bian J, Zhu Q, Wang A, Sun Y, Pang K, Li X, Lang Z. Adsorption of nitrate from water by quaternized chitosan wrinkled microspheres@MgFe-LDHs core-shell composite. NEW J CHEM 2022. [DOI: 10.1039/d2nj01902g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In recent years, nitrate pollution in water became one of the global ecological problems. In this study, a new core-shell composite (GCS@CTA@MgFe-LDHs) was prepared by in-situ growth of MgFe-Cl--LDHs plates...
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26
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Gizaw A, Zewge F, Chebude Y, Tesfaye M, Mekonnen A. Phosphate abatement using calcium silicate hydrate synthesized from alum factory solid waste residue. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.1998125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Alemu Gizaw
- Africa Center of Excellence for Water Management, Addis Ababa University, Addis Ababa, Ethiopia
- Department of Chemical Engineering, Adama Science and Technology University, Adama, Ethiopia
| | - Feleke Zewge
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Yonas Chebude
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Melakuu Tesfaye
- Department of Chemical Engineering, Adama Science and Technology University, Adama, Ethiopia
| | - Andualem Mekonnen
- Center for Environmental Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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Eltaweil AS, Omer AM, El-Aqapa HG, Gaber NM, Attia NF, El-Subruiti GM, Mohy-Eldin MS, Abd El-Monaem EM. Chitosan based adsorbents for the removal of phosphate and nitrate: A critical review. Carbohydr Polym 2021; 274:118671. [PMID: 34702487 DOI: 10.1016/j.carbpol.2021.118671] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 09/10/2021] [Accepted: 09/10/2021] [Indexed: 01/18/2023]
Abstract
The tremendous development in the industrial sector leads to discharging of the several types of effluents containing detrimental contaminants into water sources. Lately, the proliferation of toxic anions particularly phosphates and nitrates onto aquatic systems certainly depreciates the ecological system and causes a deadly serious problem. Chitosan (Cs) is one of the most auspicious biopolymer adsorbents that are being daily developed for removing of various contaminants from polluted water. This is due to its unparalleled benefits involving biocompatibility, non-toxicity, facile modifications and low-cost production. Nevertheless, chitosan displays considerable drawbacks including low adsorption capacity, low surface area and lack of reusability. Therefore, few findings have been established regarding the aptitude of modified chitosan-based adsorbents towards phosphate and nitrate anions. This review elaborates an overview for the current advances of modified chitosan based-adsorbent for phosphate and nitrate removal, in specific multivalent metals-modified chitosan, clays and zeolite-modified chitosan, magnetic chitosan and carbon materials-modified chitosan. The efforts that have been executed for enriching their adsorption characteristics as well as their possible adsorption mechanisms and reusability were well addressed. Besides, the research conclusions for the optimum adsorption conditions were also discussed, along with emphasizing the foremost research gaps and future potential trends that could motivate further research and innovation to find best solutions for water treatment problems facing the world.
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Affiliation(s)
| | - Ahmed M Omer
- Polymer Materials Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P. O. Box: 21934, Alexandria, Egypt.
| | - Hisham G El-Aqapa
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Nourhan Mohamed Gaber
- Department of Medical Laboratories, Faculty of Applied health science technology, Pharos University in Alexandria, Alexandria, Egypt
| | - Nour F Attia
- Fire Protection Laboratory, Chemistry Division, National Institute for Standards, 136, Giza 12211, Egypt
| | - Gehan M El-Subruiti
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Mohamed S Mohy-Eldin
- Polymer Materials Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P. O. Box: 21934, Alexandria, Egypt
| | - Eman M Abd El-Monaem
- Chemistry Department, Faculty of Science, Alexandria University, Alexandria, Egypt
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Wang K, Wang T, Islam QA, Wu Y. Layered double hydroxide photocatalysts for solar fuel production. CHINESE JOURNAL OF CATALYSIS 2021. [DOI: 10.1016/s1872-2067(21)63861-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Wang Y, Li J, Yuan Y, Si Y, Xu J, Li M, Peng X. La(OH)3 loaded magnetic nanocomposites derived from sugarcane bagasse cellulose for phosphate adsorption: Characterization, performance and mechanism. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127060] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Aswin Kumar I, Jeyaseelan A, Viswanathan N, Naushad M, Valente AJ. Fabrication of lanthanum linked trimesic acid as porous metal organic frameworks for effective nitrate and phosphate adsorption. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122446] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Cheng J, Zhang X, Tang Y, Song Z, Jiang Y, Xu Z, Jin X. Nitrogen removal from domestic wastewater using core-shell anthracite/Mg-layered double hydroxides (LDHs) in constructed wetlands. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:38349-38360. [PMID: 33733402 DOI: 10.1007/s11356-021-13422-7] [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: 12/22/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
To investigate the mechanism of nitrogen removal by anthracites and enhance the nitrogen removal efficiency in constructed wetland, three kinds of layered double hydroxides (MgFe-LDHs, MgCo-LDHs, MgAl-LDHs) were prepared by co-precipitation under alkaline conditions and coated in situ on the surface of anthracites to synthesize core-shell anthracites/Mg-LDHs composites. Experiments with different treatments (columns loaded with original anthracites and anthracite/Mg-LDH composites) were conducted to study the nitrogen removal efficiency of domestic wastewater in constructed wetlands. The results of nitrogen removal experiments showed that the anthracite/MgAl-LDH composite had the best performance with average removal rates of 53.69%, 72.91%, and 47.43% for TN, NH4+-N, and organic nitrogen, respectively. Modification changed the denitrification mode of the anthracites. The data of adsorption isothermal experiments were fitted better with the Freundlich model. The amount of ammonifier, nitrosobacteria, nitrobacter, and denitrifier on the surface of the Mg-LDH-modified anthracite was higher than that of the original anthracite. The performance of the anthracite in removing nitrogen was attributed to physical interception, chemical adsorption, and biological degradation. Moreover, the modified anthracites were superior to the original anthracite in the chemical adsorption and biodegradation, which indicated that coating the Mg-LDHs on the surface of common anthracite was a potential method to improve the nitrogen removal efficiency of domestic wastewater and to restore the eutrophic water body.
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Affiliation(s)
- Jing Cheng
- School of Civil Engineering and Architecture, Wuhan University of Technology, 122, Luoshi Road, Hongshan District, Wuhan, 430070, China
| | - Xiangling Zhang
- School of Civil Engineering and Architecture, Wuhan University of Technology, 122, Luoshi Road, Hongshan District, Wuhan, 430070, China.
| | - Yuqi Tang
- School of Civil Engineering and Architecture, Wuhan University of Technology, 122, Luoshi Road, Hongshan District, Wuhan, 430070, China
| | - Zan Song
- School of Civil Engineering and Architecture, Wuhan University of Technology, 122, Luoshi Road, Hongshan District, Wuhan, 430070, China
| | - Yinghe Jiang
- School of Civil Engineering and Architecture, Wuhan University of Technology, 122, Luoshi Road, Hongshan District, Wuhan, 430070, China
| | - Zhouying Xu
- School of Civil Engineering and Architecture, Wuhan University of Technology, 122, Luoshi Road, Hongshan District, Wuhan, 430070, China
| | - Xi Jin
- School of Civil Engineering and Architecture, Wuhan University of Technology, 122, Luoshi Road, Hongshan District, Wuhan, 430070, China
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Ma J, Wang CC, Zhao ZX, Wang P, Li JJ, Wang FX. Adsorptive capture of perrhenate (ReO4−) from simulated wastewater by cationic 2D-MOF BUC-17. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115218] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Almanassra IW, Kochkodan V, Mckay G, Atieh MA, Al-Ansari T. Review of phosphate removal from water by carbonaceous sorbents. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 287:112245. [PMID: 33735679 DOI: 10.1016/j.jenvman.2021.112245] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/05/2021] [Accepted: 02/20/2021] [Indexed: 06/12/2023]
Abstract
In the last decades, phosphate is considered the main cause of eutrophication and has received substantial attention from the scientific community. Phosphate is a major pollutant that deteriorates water quality, which has been increasing in water resources, primarily due to the increasing global population and corresponding activities. Adsorption technology is amongst the different technologies used to decrease the phosphate levels in water, and has been found to be highly effective even at low phosphate concentrations. Carbonaceous materials and their composites have been widely used for phosphate removal due to their exceptional surface properties and high phosphate sorption capacity. Considering the importance of the topic, this study reviews the reported literature in the field of adsorptive removal of phosphate over various carbon-based adsorbents such as activated carbon, charcoal, graphene, graphene oxide, graphite and carbon nanotubes. Moreover, insights into the adsorption behaviour, experimental parameters, mechanisms, thermodynamics, effect of coexisting ions and the possible desorption processes of phosphate onto modified and unmodified carbonaceous adsorbents are also considered. Finally, research challenges and gaps have been highlighted.
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Affiliation(s)
- Ismail W Almanassra
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Viktor Kochkodan
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, PO Box 5825, Doha, Qatar.
| | - Gordon Mckay
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar
| | - Muataz Ali Atieh
- College of Engineering, University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates; Desalination Research Group, Research Institute of Sciences and Engineering, University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates
| | - Tareq Al-Ansari
- Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar; Division of Engineering Management and Decision Sciences, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar.
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Effective and selective removal of organic pollutants from aqueous solutions using 1D hydroxyapatite-decorated 2D reduced graphene oxide nanocomposite. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115795] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pandi K, Choi J. Selective removal of anionic ions from aqueous environment using iron-based metal-organic frameworks and their mechanistic investigations. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115367] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Karthikeyan P, Elanchezhiyan SS, Meenakshi S, Park CM. Magnesium ferrite-reinforced polypyrrole hybrids as an effective adsorbent for the removal of toxic ions from aqueous solutions: Preparation, characterization, and adsorption experiments. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124892. [PMID: 33370697 DOI: 10.1016/j.jhazmat.2020.124892] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 12/09/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Contaminated waters with high contents of toxic anions are detrimental to the human health and wildlife. Thus, the quality of drinking water should be carefully monitored. Adsorption technique has been determined to be a reasonable strategy out of several methods used to remove toxic anions from water. Novel MgFe2O4-reinforced polypyrrole (Ppy@x%MgFe2O4) (x = 1%, 2%, and 5% of MgFe2O4) hybrids were synthesized from a pyrrole monomer and MgFe2O4 using a simple chemical oxidation method. The fabricated hybrids were studied for their capability to remove PO43-, NO3-, and Cr(VI) from aqueous solutions. The results showed that PO43-, NO3-, and Cr(VI) removal was highly pH-dependent. The adsorption isotherms of hybrids were fitted well by the Langmuir model, with the maximum adsorption efficiency of 116.90, 76.14, and 138.60 mg/g for PO43-, NO3-, and Cr(VI), respectively. In addition, the above-mentioned toxic anions could be efficiently desorbed from spent Ppy@x%MgFe2O4 using a 0.1 M NaOH solution, and the hybrids exhibited good regenerability. The prepared materials are promising candidates for PO43-, NO3-, and Cr(VI) removal and exhibit high adsorption efficiency, rapid adsorption-desorption behavior, and appropriate recovery from the aqueous medium under external magnetic field.
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Affiliation(s)
- Perumal Karthikeyan
- Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram, 624032, Dindigul, Tamil Nadu, India; Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
| | - S Sd Elanchezhiyan
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
| | - Sankaran Meenakshi
- Department of Chemistry, The Gandhigram Rural Institute-Deemed to be University, Gandhigram, 624032, Dindigul, Tamil Nadu, India.
| | - Chang Min Park
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
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Mohammadi M, Sedighi M, Ghasemi M. Systematic investigation of simultaneous removal of phosphate/nitrate from water using Ag/rGO nanocomposite: Development, characterization, performance and mechanism. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-020-04357-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Development of triaminotriazine functionalized graphene oxide capped chitosan porous composite beads for nutrients remediation towards water purification. Int J Biol Macromol 2020; 170:13-23. [PMID: 33333098 DOI: 10.1016/j.ijbiomac.2020.12.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/19/2020] [Accepted: 12/03/2020] [Indexed: 12/19/2022]
Abstract
The porous, definite and nitrogen rich triaminotriazine (TAT) grafted graphene oxide (GO) known as TATGO composite was developed for nutrients (NO3- and PO43-) retention. Additionally, the structural property of TATGO composite was improved with the use of chitosan (CS) to produce easily separable TATGO@CS hybrid beads which possess the significant NO3- and PO43- adsorption capacities of 58.46 and 61.38 mg/g respectively than their individual materials. The instrumentations such as SEM, TGA, FTIR, EDAX, XRD and BET studies were executed for adsorbents. The optimization of the parameters accountable for adsorption process was performed in batch scale. The effect of isotherms (Langmuir, Freundlich and Dubinin-Radushkevich (D-R)), kinetics (pseudo-first/second order and particle/intraparticle diffusion) and thermodynamic parameters (ΔG°, ΔH° and ΔS°) of the adsorption was explored. The removal mechanism of TATGO@CS hybrid beads was to be electrostatic attraction on NO3- and PO43-. The field applicability and reuse of TATGO@CS hybrid beads was also inspected.
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Sirajudheen P, Karthikeyan P, Ramkumar K, Meenakshi S. Environment responsive Al3+ networked chitosan-gelatin spherical beads for the effective removal of organic pollutants from aqueous solutions. Int J Biol Macromol 2020; 164:3055-3064. [DOI: 10.1016/j.ijbiomac.2020.08.127] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/12/2020] [Accepted: 08/15/2020] [Indexed: 12/27/2022]
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Karthikeyan P, Meenakshi S. Fabrication of hybrid chitosan encapsulated magnetic-kaolin beads for adsorption of phosphate and nitrate ions from aqueous solutions. Int J Biol Macromol 2020; 168:750-759. [PMID: 33232702 DOI: 10.1016/j.ijbiomac.2020.11.132] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/09/2020] [Accepted: 11/18/2020] [Indexed: 11/25/2022]
Abstract
Phosphate and nitrate are commonly used industrial and agricultural nutrients that are of great anxiety because of their ubiquitous existence in water and wastewater sources and association with harmful health effects. Herein, we aimed to fabricate a novel and environmental-friendly chitosan encapsulated magnetic kaolin beads for the first time and applied for the adsorption of phosphate and nitrate ions from water. The physico-chemical properties of MK-chitosan beads were established by XRD, FTIR, and TGA-DSC techniques. Surface area (BET) analysis shows that MK-chitosan beads have a specific surface area of 2.12 m2/g. Surface morphology and elemental studies (SEM and EDAX) revealed the porous nature of MK-chitosan beads. The synthesized bead material employed as selective and effective adsorbent material for the remediation of phosphate and nitrate from water/ wastewater. The impact of external adsorption influencing effects likes, adsorbent dose, contact time, co-anions, pH of the solution, and temperature experiments have been performed. Adsorption isotherm and kinetic experiments have been studied and the data have been well tailored by the Freundlich isotherm and pseudo-second-order kinetic models. Thermodynamic parametric studies revealed endothermic and spontaneous nature of the overall sorption system. Besides, MK-chitosan beads were found to regeneration performance up to eight consecutive cycles. Furthermore, the adsorbent-adsorbate system implying that MK-chitosan beads could be a promising candidate for the removal of phosphate and nitrate ions from aqueous solutions.
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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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Ahmed M, Hameed B, Hummadi E. Review on recent progress in chitosan/chitin-carbonaceous material composites for the adsorption of water pollutants. Carbohydr Polym 2020; 247:116690. [DOI: 10.1016/j.carbpol.2020.116690] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 06/08/2020] [Accepted: 06/23/2020] [Indexed: 12/12/2022]
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Wu J, Lin J, Zhan Y. Interception of phosphorus release from sediments using Mg/Fe-based layered double hydroxide (MF-LDH) and MF-LDH coated magnetite as geo-engineering tools. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 739:139749. [PMID: 32535461 DOI: 10.1016/j.scitotenv.2020.139749] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/24/2020] [Accepted: 05/25/2020] [Indexed: 06/11/2023]
Abstract
A magnesium/iron-based layered double hydroxide (MF-LDH) and a composite of MF-LDH and magnetite (MF-LDH@Fe3O4) were synthesized, characterized and used as solid-phase phosphorus (P)-sorbents (SPPSs) to control the release of sedimentary P. The behavior and mechanism of phosphate adsorption onto MF-LDH and MF-LDH@Fe3O4 were studied. The effect of MF-LDH capping and amendment on the migration of P in sediments were comparatively investigated, and the impact of fabric-wrapped and unwrapped MF-LDH@Fe3O4 capping on P mobilization in sediments were also comparatively investigated. Results showed that both MF-LDH and MF-LDH@Fe3O4 had good phosphate adsorption performance, and the adsorption mechanisms included cation exchange, electrostatic attraction, ligand exchange and inner-sphere complex formation. Sediment capping and amendment using MF-LDH both could dramatically reduce the risk of the release of soluble reactive P (SRP) and diffusive gradient in thin-films-labile P (P-DGT) from sediments into overlying waters (OLY-Ws), and the MF-LDH capping had a better suppressing efficiency of sediment-P release into OLY-W than the MF-LDH amendment. Sediment capping with the fabric-wrapped and unwrapped MF-LDH@Fe3O4 both greatly decreased the risk of SRP and P-DGT released from sediment into OLY-W, and the efficiency of the prevention of SRP released from sediment into OLY-W by the fabric-wrapped MF-LDH@Fe3O4 capping layer (about 81-90%) was slightly lower than that by the unwrapped MF-LDH@Fe3O4 capping layer (about 94-99%). The reduction of P-DGT in the top sediment and the direct interception of the soluble P from pore water (POR-W) to OLY-W by the MF-LDH@Fe3O4 capping layer were the keys to the management of P released from sediment by the MF-LDH@Fe3O4 capping. From the standpoint of the efficiency of sedimentary P suppression, the convenience of application and the sustainability of sediment remediation, sediment capping with the fabric-wrapped MF-LDH@Fe3O4 is a promising approach to manage the release of sedimentary P into OLY-W.
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Affiliation(s)
- Junlin Wu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Jianwei Lin
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
| | - Yanhui Zhan
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
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Lin J, Zhao Y, Zhan Y, Wang Y. Influence of coexisting calcium and magnesium ions on phosphate adsorption onto hydrous iron oxide. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:11303-11319. [PMID: 31965506 DOI: 10.1007/s11356-020-07676-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
Removal of phosphorus (P) from municipal wastewater is of vital importance to the control of eutrophication in receiving freshwater bodies. Typical cations such as Ca2+ and Mg2+ generally exist in municipal wastewater, and they may affect the sorption behavior and mechanism of iron oxide-based materials for aqueous phosphate (HxPO4x - 3, x = 0, 1, 2, or 3 depending on solution pH). To better apply iron oxide-containing materials as adsorbents to eliminate HxPO4x - 3 in municipal wastewater, a hydrous ferric oxide (HFEO) was prepared and characterized at first and then the impact of coexisting Ca2+ and Mg2+ on the uptake of HxPO4x - 3 by HFEO was studied. The results showed that, without coexisting Ca2+ and Mg2+, the kinetic data for HxPO4x - 3 sorption onto HFEO were better described by the Elovich model (R2 = 0.953) than the pseudo-second-order (R2 = 0.838) and pseudo-first-order (R2 = 0.641) models, and the isotherm data were fitted better with the Dubinin-Radushkevich (R2 = 0.966) and Freundlich (R2 = 0.953) models than with the Langmuir (R2 = 0.924) model. The ligand exchange of the Fe-bound hydroxyl group with HxPO4x - 3 and the generation of Fe-O-P bonding played a key role in the uptake of HxPO4x - 3 by HFEO in the absence of Ca2+ and Mg2+. Coexisting Ca2+ and Mg2+ greatly improved the adsorptive removal of HxPO4x - 3 by HFEO, including the adsorption capacity and initial adsorption rate. According to the Langmuir isotherm equation, the predicted maximum HxPO4x - 3 adsorption capacity for HFEO at pH 7 in the presence of 2 mmol/L Ca2+ (24.7 mg P/g) or 2 mmol/L Mg2+ (18.4 mg P/g) was much larger than that without coexisting Ca2+ and Mg2+ (10.7 mg P/g). The formation of aqueous CaHPO40 and MgHPO40 species firstly and then the adsorption of the formed CaHPO40 and MgHPO40 species on the HFEO surface to generate the HPO42--bridged ternary complexes (i.e., Fe(OPO3H)Ca+ and Fe(OPO3H)Mg+) had an important role in the improvement of HxPO4x - 3 adsorption onto HFEO by coexisting Ca2+ and Mg2+.
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Affiliation(s)
- Jianwei Lin
- College of Marine Ecology and Environment, Shanghai Ocean University, Hucheng Ring Road No. 999, Shanghai, 201306, China.
| | - Yuying Zhao
- College of Marine Ecology and Environment, Shanghai Ocean University, Hucheng Ring Road No. 999, Shanghai, 201306, China
| | - Yanhui Zhan
- College of Marine Ecology and Environment, Shanghai Ocean University, Hucheng Ring Road No. 999, Shanghai, 201306, China
| | - Yan Wang
- College of Marine Ecology and Environment, Shanghai Ocean University, Hucheng Ring Road No. 999, Shanghai, 201306, China
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