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Alomari RA, Athinarayanan J, Periasamy VS, Alshatwi AA. Mucilage-assisted fabrication of molybdenum trioxide nanostructures for photothermal ablation of breast cancer cells. Biotechnol Appl Biochem 2024; 71:326-335. [PMID: 38112040 DOI: 10.1002/bab.2543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 11/21/2023] [Indexed: 12/20/2023]
Abstract
Nanostructures have been used for various biomedical applications due to their optical, antibacterial, magnetic, antioxidant, and biocompatible properties. Cancer is a prevalent disease that severely threatens human life and health. Thus, innovative and effective therapeutic approaches are urgently required for cancer. Photothermal therapy (PTT) is a promising approach to killing cancer cells. In this investigation, we developed a low-cost, simple, green technique to fabricate molybdenum trioxide nanostructures (MNs) using Opuntia ficus-indica mucilage as a template. Moreover, the MNs were functionalized with folic acid (FA) for cancer PTT. The X-ray diffractometer results revealed that the prepared MNs have an orthorhombic crystal phase. The transmission electron microscope image of MNs shows a flake shape with 20-150 nm diameter. The cytotoxicity of MNs and FA-conjugated MNs was studied in vitro. These cell viability assay results suggested that fabricated MoO3 nanostructures reduced 25% of cell viability in MCF-7 cells, even at high doses. However, even with high-dose treatment, FA/MNs do not cause significant cell death. Acridine orange/ethidium bromide (AO/EB) staining revealed DNA and chromatin condensation in MCF-7 cells exposed to MNs. Overall, the in vitro study results suggested that FA/MNs have excellent biocompatibility, which applies to biomedical applications. MNs dispersion temperature gradually increases from 26 to 58°C under 808 nm laser irradiation. We found significant mortality rates after NIR irradiation in MNs- or FA/MNs-treated MCF-7 cells. These findings suggest that FA/MNs can be used as an effective photothermal agent to treat breast cancer.
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Affiliation(s)
- Reem A Alomari
- Nanobiotechnology and Molecular Biology Research Laboratory, Department of Food Science and Nutrition, College of Food Science and Agriculture, King Saud University, Riyadh, Saudi Arabia
| | - Jegan Athinarayanan
- Nanobiotechnology and Molecular Biology Research Laboratory, Department of Food Science and Nutrition, College of Food Science and Agriculture, King Saud University, Riyadh, Saudi Arabia
| | - Vaiyapuri Subbarayan Periasamy
- Nanobiotechnology and Molecular Biology Research Laboratory, Department of Food Science and Nutrition, College of Food Science and Agriculture, King Saud University, Riyadh, Saudi Arabia
| | - Ali A Alshatwi
- Nanobiotechnology and Molecular Biology Research Laboratory, Department of Food Science and Nutrition, College of Food Science and Agriculture, King Saud University, Riyadh, Saudi Arabia
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2
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Hao L, Jia D, Liu M. Experimental and theoretic mechanism of successive adsorption of oppositely charged Cu(II) and Cr(VI) onto amine-rich cellulose adsorbent. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:112422-112432. [PMID: 37831262 DOI: 10.1007/s11356-023-30246-9] [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: 07/07/2023] [Accepted: 09/29/2023] [Indexed: 10/14/2023]
Abstract
A novel layer-by-layer adsorption was proposed and used for adsorption of Cu(II) and Cr(VI) on the pre-bleached sawdust cellulose coated with polyethylenimine (PSC-PEI). It was found that PSC-PEI loaded with Cu(II) cations was favorable for Cr(VI) anions adsorption. The maximum adsorption capacities estimated by Langmuir model for Cu(II) and Cr(VI) were 80.0 and 93.5 mg/g, respectively. The kinetic regression results, as fitted by the pseudo-second order model, revealed that the rate constant (k2) for Cr(VI) at 0.07 g/mg/min is significantly greater than that observed for Cu(II) at 0.02 g/mg/min, indicating that PSC-PEI exhibited a stronger affinity towards Cr(VI). The first-layer adsorption mechanism for Cu(II) involved the formation of copper-amine complex. Zeta potential and XPS results revealed that the second-layer adsorption of Cr(VI) mainly involved electrostatic attraction and redox reaction. The simulated results for dynamic column test showed good agreement between the theoretical values and the experimental values. The mass transfer mechanism indicated that Cu(II) adsorption was dependent on external mass transfer process, while the internal mass transfer is the rate-determining step for Cr(VI) adsorption. The saturated adsorbent was regenerated by washing with 5% NaOH and 5% H2SO4 solutions and the adsorption ability of more than 70% was sustained after three cycles of regeneration. This study demonstrated that the oppositely charged Cu(II) cations and Cr(VI) anions could be effectively removed by amine-rich cellulose adsorbent from wastewater through layer-by-layer adsorption.
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Affiliation(s)
- Linlin Hao
- College of Marine and Environmental Sciences, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China.
- Tianjin Key Laboratory of Marine Resources & Chemistry, Tianjin, 300457, China.
| | - Dongmei Jia
- College of Marine and Environmental Sciences, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
- Tianjin Key Laboratory of Marine Resources & Chemistry, Tianjin, 300457, China
| | - Mengzhu Liu
- College of Marine and Environmental Sciences, Tianjin University of Science & Technology, Tianjin, 300457, People's Republic of China
- Tianjin Key Laboratory of Marine Resources & Chemistry, Tianjin, 300457, China
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Li G, Liu Y, Huang W, Chen L, Héroux P, Liu Y. Simultaneous remediation of arsenic and organic chemicals contaminated soil and groundwater using chemical oxidation and precipitation/stabilization: a case study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:86478-86483. [PMID: 37432574 DOI: 10.1007/s11356-023-28604-8] [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: 01/18/2023] [Accepted: 07/01/2023] [Indexed: 07/12/2023]
Abstract
After the departure of industrial facilities, reuse of the land in developed cities in China is problematic, due to the land contamination issues. The rapid remediation of sites with complex contamination is crucial and urgently needed. Herein, the case of on-site remediation of arsenic (As) in soil, as well as benzo(a)pyrene, total petroleum hydrocarbons, and As in groundwater was reported. For contaminated soil, the oxidant and deactivator (consisting of 20% sodium persulfate, 40% ferrous sulfate (FeSO4), and 40% portland cement) were applied to oxidize and immobilize As. As a result, the total amount and lixivium concentration of As were constrained under 20 mg/kg and 0.01 mg/L, respectively. Meanwhile, for contaminated groundwater, As and organic contaminants were treated by FeSO4/ozone and FeSO4/hydrogen peroxide with mass ratios of 1:5 and 1:8, respectively. The continuous monitoring of contaminants in 22 monitoring wells shown that all contaminants in groundwater were treated to meet the standards. In addition, the risk of secondary pollution and operation cost was effectively reduced by proper disposal and resourceful utilization. The findings indicated that the method of oxidation and precipitation/stabilization is technically, environmentally, and economically feasible for the remediation of contaminated sites with similar complex pollutants.
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Affiliation(s)
- Guoqing Li
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
- Shanghai institute of pollution control and ecological security, Shanghai, 200092, China
| | - Yanbiao Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China
- Shanghai institute of pollution control and ecological security, Shanghai, 200092, China
| | - Wei Huang
- Shanghai Energy Conservation of Environment Co., Ltd., Taolin Road No. 18, Shanghai, 200135, China
| | - Luhai Chen
- Shanghai Jinxiang Environmental Technology Co., Ltd., Zhongjiang Road No. 388, Shanghai, 200062, China
| | - Paul Héroux
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, H3A 1A3, Canada
| | - Yanan Liu
- College of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China.
- Shanghai institute of pollution control and ecological security, Shanghai, 200092, China.
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Kanel SR, Das TK, Varma RS, Kurwadkar S, Chakraborty S, Joshi TP, Bezbaruah AN, Nadagouda MN. Arsenic Contamination in Groundwater: Geochemical Basis of Treatment Technologies. ACS ENVIRONMENTAL AU 2023; 3:135-152. [PMID: 37215436 PMCID: PMC10197174 DOI: 10.1021/acsenvironau.2c00053] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 02/03/2023] [Accepted: 02/03/2023] [Indexed: 05/24/2023]
Abstract
Arsenic (As) is abundant in the environment and can be found in both organic (e.g., methylated) and inorganic (e.g., arsenate and arsenite) forms. The source of As in the environment is attributed to both natural reactions and anthropogenic activities. As can also be released naturally to groundwater through As-bearing minerals including arsenopyrites, realgar, and orpiment. Similarly, agricultural and industrial activities have elevated As levels in groundwater. High levels of As in groundwater pose serious health risks and have been regulated in many developed and developing countries. In particular, the presence of inorganic forms of As in drinking water sources gained widespread attention due to their cellular and enzyme disruption activities. The research community has primarily focused on reviewing the natural occurrence and mobilization of As. Yet, As originating from anthropogenic activities, its mobility, and potential treatment techniques have not been covered. This review summarizes the origin, geochemistry, occurrence, mobilization, microbial interaction of natural and anthropogenic-As, and common remediation technologies for As removal from groundwater. In addition, As remediation methods are critically evaluated in terms of practical applicability at drinking water treatment plants, knowledge gaps, and future research needs. Finally, perspectives on As removal technologies and associated implementation limitations in developing countries and small communities are discussed.
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Affiliation(s)
- Sushil R. Kanel
- Department
of Chemistry, Wright State University, Dayton, Ohio 45435, United States
| | - Tonoy K. Das
- Nanoenvirology
Research Group, Department of Civil and Environmental Engineering, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Rajender S. Varma
- Office
of Research & Development, Center for Environmental Solutions
and Emergency Response (CESER), United States
Environmental Protection Agency, Cincinnati, Ohio 45268, United States
| | - Sudarshan Kurwadkar
- Department
of Civil and Environmental Engineering, California State University, Fullerton, California 92831, United States
| | - Sudip Chakraborty
- Laboratory
of Transport Phenomena & Biotechnology, Department of DIMES, Universita della Calabria, Via Pietro Bucci, Cubo 42/a, Rende 87036, (CS), Italy
| | - Tista Prasai Joshi
- Environment
and Climate Study Laboratory, Faculty of Science, Nepal Academy of Science and Technology, Lalitpur 44700, Khumaltar, Nepal
| | - Achintya N. Bezbaruah
- Nanoenvirology
Research Group, Department of Civil and Environmental Engineering, North Dakota State University, Fargo, North Dakota 58108, United States
| | - Mallikarjuna N. Nadagouda
- Office
of Research & Development, Center for Environmental Solutions
and Emergency Response (CESER), United States
Environmental Protection Agency, Cincinnati, Ohio 45268, United States
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Lei Y, Yang H, Xie J, Chen Q, Quan W, Wang A. Synthesis of strong magnetic response ZIF-67 for rapid adsorption of Cu2+. Front Chem 2023; 11:1135193. [PMID: 37007055 PMCID: PMC10060551 DOI: 10.3389/fchem.2023.1135193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 03/06/2023] [Indexed: 03/18/2023] Open
Abstract
With the acceleration of industrialization and urbanization, global water resources have been polluted. Among the water pollutants, heavy metals have caused great harm to the environment and organisms. When the concentration of Cu2+ in water exceeds the standard, the intake of the human body will mainly damage the nervous system. We use MOF materials with high chemical stability, specific surface area, adsorption, and other unique properties to adsorb Cu2+. MOF-67 was prepared with various solvents, and a stronger magnetic response MOF-67 with the largest surface area and best crystal form were selected. It quickly adsorbs low-concentration Cu2+ in water to purify water quality. At the same time, it can be recovered promptly through an external magnetic field to avoid secondary pollution, which conforms to the concept of green environmental protection. When the initial concentration of Cu2+ is 50 mg/L for 30 min, the adsorption rate reaches 93.4%. The magnetic adsorbent can be reused three times.
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Affiliation(s)
- Yuanhang Lei
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang, Guizhou, China
| | - Haibo Yang
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang, Guizhou, China
| | - Jiangqin Xie
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang, Guizhou, China
| | - Qi Chen
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang, Guizhou, China
| | - Wenxuan Quan
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang, Guizhou, China
- *Correspondence: Anping Wang, ; Wenxuan Quan,
| | - Anping Wang
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang, Guizhou, China
- Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang, Guizhou, China
- *Correspondence: Anping Wang, ; Wenxuan Quan,
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Venegas-García DJ, Wilson LD. Utilization of Bioflocculants from Flaxseed Gum and Fenugreek Gum for the Removal of Arsenicals from Water. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8691. [PMID: 36500187 PMCID: PMC9740097 DOI: 10.3390/ma15238691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 10/30/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Mucilage-based flocculants are an alternative to synthetic flocculants and their use in sustainable water treatment relates to their non-toxic and biodegradable nature. Mucilage extracted from flaxseed (FSG) and fenugreek seed (FGG) was evaluated as natural flocculants in a coagulation-flocculation (CF) process for arsenic removal, and were compared against a commercial xanthan gum (XG). Mucilage materials were characterized by spectroscopy (FT-IR, 13C NMR), point-of-zero charge (pHpzc) and thermogravimetric analysis (TGA). Box-Behnken design (BBD) with response surface methodology (RSM) was used to determine optimal conditions for arsenic removal for the CF process for three independent variables: coagulant dosage, flocculant dosage and settling time. Two anionic systems were tested: S1, roxarsone (organic arsenate 50 mg L-1) at pH 7 and S2 inorganic arsenate (inorganic arsenate 50 mg L-1) at pH 7.5. Variable arsenic removal (RE, %) was achieved: 92.0 (S1-FSG), 92.3 (S1-FGG), 92.8 (S1-XG), 77.0 (S2-FSG), 69.6 (S2-FGG) and 70.6 (S2-XG) based on the BBD optimization. An in situ kinetic method was used to investigate arsenic removal, where the pseudo-first-order model accounts for the kinetic process. The FSG and FGG materials offer a sustainable alternative for the controlled removal of arsenic in water using a facile CF treatment process with good efficiency, as compared with a commercial xanthan gum.
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Ultrasensitive colorimetric detection of fluoride and arsenate in water and mammalian cells using recyclable metal oxacalixarene probe: a lateral flow assay. Sci Rep 2022; 12:17119. [PMID: 36224315 PMCID: PMC9556598 DOI: 10.1038/s41598-022-21407-w] [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: 02/09/2022] [Accepted: 09/27/2022] [Indexed: 01/04/2023] Open
Abstract
Globally 3 billion people are consuming water with moderately high concentrations of fluoride and arsenic. The development of a simple point of care (PoC) device or home device for the detection of fluoride/arsenic ensures safety before consuming water. Till date, lateral flow assay (LFA) based PoC devices can detect nucleic acids, viruses and diseases. An aluminium complex of rhodamine B functionalized oxacalix[4]arene (L) was designed to execute the LFA-based PoC device. Initially, Al3+ and Fe3+ ions were involved in complexation with the rhodamine B functionalized oxacalix[4]arene (L), resulting C1 (L-Al3+) and C2 (L-Fe3+) complexes respectively. The receptor L, as well as the probes (C1, C2), were characterized thoroughly using mass spectroscopy, FTIR, NMR, and EA. C1 and C2 were further utilized as recyclable probes for the detection of aqueous fluoride (21 ppb) and arsenate (1.92 ppb) respectively. The computational calculation indicates that upon complexation, the spirolactam ring opening at the rhodamine B site leads to optoelectronic changes. The consistency of LFA-based portable sensing device has been tested with water samples, synthetic fluoride standards and dental care products like toothpaste and mouthwash with concentrations ≥ 3 ppm. Moreover, fixed cell imaging experiments were performed to ascertain the in-vitro sensing phenomena.
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8
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Huang W, Xu H, Liu X, Wang L, Li S, Ji L, Qu Z, Yan N. Surface protection method for the magnetic core using covalent organic framework shells and its application in As(III) depth removal from acid wastewater. J Environ Sci (China) 2022; 115:1-9. [PMID: 34969439 DOI: 10.1016/j.jes.2021.07.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/10/2021] [Accepted: 07/15/2021] [Indexed: 06/14/2023]
Abstract
Fe3O4-based materials are widely used for magnetic separation from wastewater. However, they often suffer from Fe-leaching behavior under acidic conditions, decreasing their activity and limiting sustainable practical applications. In this study, covalent organic frameworks (COFs) were used as the shell to protect the Fe3O4 core, and the Fe3O4@COF core-shell composites were synthesized for As(III) removal from acid wastewater. The imine-linked COFs can in situ grow on the surface of the Fe3O4 core layer by layer with [COFs/Fe3O4]mol ratio of up to 2:1. The Fe-leaching behavior was weakened over a wide pH range of 1-13. Moreover, such composites keep their magnetic characteristic, making them favorable for nanomaterial separation. As(III) batch adsorption experiments results indicated that, when COFs are used as the shell for the Fe3O4 core, a balance between As(III) removal efficiencies and the thickness of the COF shell exists. Higher As(III) removal efficiencies are obtained when the [COFs/Fe3O4]mol ratios were < 1.5:1, but thicker COF shells were not beneficial for As(III) removal. Such composites also exhibited better As(III) removal performances in the pH range of 1-7. Over a wide pH range, the zeta potential of Fe3O4@COF core-shell composites becomes more positive, which benefits the capture of negative arsenic ions. In addition, thinner surface COFs were favorable for mass transfer and facilitating the reaction of Fe and As elements. Our study highlights the promise of using COFs in nanomaterial surface protection and achieving As(III) depth removal under acidic conditions.
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Affiliation(s)
- Wenjun Huang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Haomiao Xu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xiaoshuang Liu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Longlong Wang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shutang Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Leipeng Ji
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zan Qu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Naiqiang Yan
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
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Cai G, Tian Y, Li D, Zhang J, Li L, Wang Q, Sun H, Zhang H, Wang P. Self-enhanced and efficient removal of As(III) from water using Fe-Cu-Mn composite oxide under visible-light irradiation: Synergistic oxidation and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2022; 422:126908. [PMID: 34418837 DOI: 10.1016/j.jhazmat.2021.126908] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 08/06/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
Here, we prepared a novel nanostructured Fe-Cu-Mn composite oxide (FCMOx) adsorbent using an ultrasonic coprecipitation method. The maximum adsorption capacity of As(III) and As(V) reached 158.5 and 115.2 mg/g under neutral conditions, respectively. The effects of several environmental factors (coexisting ions, solution pH, etc.) on the removal of inorganic arsenic using FCMOx were studied through batch experiments. The results showed that except for PO43- and high initial pH, it was not significantly affected by ionic strength and other existing anions, implying a higher selectivity and adaptability. Combined with EPR, FTIR, and XPS analysis, we concluded that the Cu component and the reactive oxygen species (ROS) it generates played a decisive role in maintaining the stability of the redox cycle between Mn(IV)/Mn(III)/Mn(II) and enhancing the oxidation efficiency of As(III). Meanwhile, the adsorption mechanism of As(V) was mainly through the replacement of the FCMOx surface -OH to form stable inner-sphere arsenic complexes, while the removal mechanism of As(III) may involve the process of synergistic oxidation and chemisorption coupling. Additionally, the effective removal of As from the simulated As-contaminated water and its satisfactory reuse performance make FCMOx adsorbents favorable candidates for the removal of As-contaminated water in the future.
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Affiliation(s)
- Guiyuan Cai
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yu Tian
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Daikun Li
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jun Zhang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Lipin Li
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qinyu Wang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Huihang Sun
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Haoran Zhang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Pu Wang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin 150090, China
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Zeng Q, Zhong H, He Z, Hu L. Efficient removal of arsenite by a composite of amino modified silica supported MnO 2/Fe-Al hydroxide (SNMFA) prepared from biotite. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 291:112678. [PMID: 33964621 DOI: 10.1016/j.jenvman.2021.112678] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 04/08/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
Developing materials from natural minerals to efficiently remove arsenite (As(Ⅲ)) from solution is vital important for resources comprehensive utilization and environment protection. In this study, biotite containing minerals was used to prepare a novel composite of amino modified silica supported MnO2/Fe-Al hydroxide (SNMFA composite), which was then applied to remove arsenite. Scanning electron microscope (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) results indicated that many amorphous MnO2 and Fe-Al hydroxide nano sheets were loaded on the surface of layered silica structure. Batch experiments showed that this composite could efficiently remove As(Ⅲ) from aqueous solution, and the maximal removal capacity was identified as 46.11 mg/g. As(Ⅲ) adsorption behaviours of SNMFA composite were confirmed by the pseudo-second-order kinetic model and Langmuir model, indicating that As(Ⅲ) adsorption on its surface was monolayer adsorption. The adsorption process was a pH and temperature dependent process, and increasing pH and temperature have facilitated the removal of As(Ⅲ). Thermodynamic analysis showed that As(Ⅲ) adsorption process was a spontaneous endothermic reaction. The As(Ⅲ) removal was mainly relied on the stable inner-sphere coordination model, and the corresponding mechanisms were involved in chelation, precipitation, oxidation-adsorption and electrostatic interaction.
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Affiliation(s)
- Qiang Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Hui Zhong
- School of Life Sciences, Central South University, Changsha, 410083, China.
| | - Zhiguo He
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China; Faculty of Materials Metallurgy & Chemistry, Jiangxi University of Science & Technology, Ganzhou, Jiangxi, 341000, China.
| | - Liang Hu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
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11
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Weerasundara L, Ok YS, Bundschuh J. Selective removal of arsenic in water: A critical review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115668. [PMID: 33017746 DOI: 10.1016/j.envpol.2020.115668] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 09/13/2020] [Accepted: 09/14/2020] [Indexed: 05/28/2023]
Abstract
Selective removal of arsenic (As) is the key challenge for any of As removal mechanisms as this not only increases the efficiency of removal of the main As species (neutral As(III) and As(V) hydroxyl-anions) but also allows for a significant reduction of waste as it does not co-remove other solutes. Selective removal has a number of benefits: it increases the capacity and lifetime of units while lowering the cost of the process. Therefore, a sustainable selective mitigation method should be considered concerning the economic resources available, the ability of infrastructure to sustain water treatment, and the options for reuse and/or safe disposal of treatment residuals. Several methods of selective As removal have been developed, such as precipitation, adsorption and modified iron and ligand exchange. The biggest challenge in selective removal of As is the presence of phosphate in water which is chemically comparable with As(V). There are two types of mechanisms involved with As removal: Coulombic or ion exchange; and Lewis acid-base interaction. Solution pH is one of the major controlling factors limiting removal efficiency since most of the above-mentioned methods depend on complexation through electrostatic effects. The different features of two different As species make the selective removal process more difficult, especially under natural conditions. Most of the selective As removal methods involve hydrated Fe(III) oxides through Lewis acid-base interaction. Microbiological methods have been studied recently for selective removal of As, and although there have been only a small number of studies, the method shows remarkable results and indicates positive prospects for the future.
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Affiliation(s)
- Lakshika Weerasundara
- School of Civil Engineering and Surveying, Faculty of Health, Engineering and Sciences, University of Southern Queensland, West Street, Toowoomba, Queensland, 4350, Australia.
| | - Yong-Sik Ok
- Korea Biochar Research Center & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, Republic of Korea.
| | - Jochen Bundschuh
- School of Civil Engineering and Surveying, Faculty of Health, Engineering and Sciences, University of Southern Queensland, West Street, Toowoomba, Queensland, 4350, Australia; UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development, University of Southern Queensland, West Street, Toowoomba, Queensland, 4350, Australia.
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Chen N, Wang X, Wan Y, Luo Y, Huang Y, Zhang L. Simulated solar light driven Fe(III)/Fe(II) redox cycle for roxarsone degradation and simultaneous arsenate immobilization. JOURNAL OF HAZARDOUS MATERIALS 2020; 394:121635. [PMID: 32289620 DOI: 10.1016/j.jhazmat.2019.121635] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 10/28/2019] [Accepted: 11/07/2019] [Indexed: 06/11/2023]
Abstract
Organoarsenicals remediation requires degrading organoarsenicals and simultaneously immobilizing the resulted inorganic arsenic, and is thus a great challenge. In this study, a simulated solar light driven Fe(III)/Fe(II) cycle strategy was developed to degrade roxarsone and immobilize the generated inorganic arsenic via tuning the degree of Fe(III) hydrolysis. At pH values of 2.0 and 3.0, the hydrolysis of Fe(III) in the solution was suppressed to produce photoreactive Fe(III)-hydroxyl complexes, which could be excited by simulated solar light to generate OH for 85.3 % of roxarsone degradation into arsenate within 60 min. Density functional theory calculations suggested that Fe(OH)(H2O)52+ with lower energy separation gap was the most photoactive Fe(III)-hydroxyl complex for OH generation. With further increasing pH value to 6.0, the hydrolysis of Fe(III) was promoted to precipitate the arsenate for its immobilization, accompanying with the decrease of final iron ions and arsenate concentrations to 0.012 mmol L-1 and 58 μg L-1, respectively. Meanwhile, the undegraded roxarsone was also adsorbed by the precipitate, increasing the overall roxarsone removal efficiency to 99.0 %. This study offers a promising strategy for the efficient organoarsenicals treatment, and also sheds light on the dual effects of iron based materials in organic pollutants degradation and heavy metal ions immobilization.
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Affiliation(s)
- Na Chen
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Xiaobing Wang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Yichao Wan
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Yani Luo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Yunhua Huang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental & Applied Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China.
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13
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Liu L, Chen H, Yang X, Tan W, Liu C, Dang Z, Qiu G. High-efficiency As(III) oxidation and electrocoagulation removal using hematite with a charge-discharge technique. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 703:135678. [PMID: 31771850 DOI: 10.1016/j.scitotenv.2019.135678] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 11/15/2019] [Accepted: 11/19/2019] [Indexed: 06/10/2023]
Abstract
Arsenite (As(III)) is generally removed by adsorption or coprecipitation after being oxidized to arsenate (As(V)). Electrocoagulation is regarded as an effective and environment-friendly method for arsenic (As) removal from wastewater. However, some disadvantages including the passivation of electrode and high energy consumption limit its wide application. Herein, a multi-cycle galvanostatic charge-discharge technique was employed to remove aqueous As(III) using hematite prepared through a microwave-assisted hydrothermal reaction. When charge-discharge experiments were conducted at the potential window of -0.8-0 V (vs. SCE) in As(III) solution with NaCl as the background electrolyte, ClO- intermediates and the counter electrode at high potential contributed much to As(III) oxidation. As(V) was adsorbed on ferrihydrite generated from the re-oxidation of released Fe2+, forming FeAsO4 precipitate. A higher removal ratio of As(T) was achieved at initial pH 7.0 compared with that at initial pH 5.0 and 9.0. When the hematite mass was 4, 10 and 15 mg, the removal ratio of As(T) reached 55.2%, 79.6% and 98.6% after 600 cycles of charge-discharge. The periodic redox reactions of hematite electrodes occurred in each charge-discharge process, effectively avoiding the passivation of electrode. Additionally, the electrochemical system can be used as a supercapacitor for power output. The present work provides a novel strategy for high-efficiency As(III) immobilization and removal from aqueous solution.
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Affiliation(s)
- Lihu Liu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Hanchen Chen
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiong Yang
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenfeng Tan
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China
| | - Chengshuai Liu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, China
| | - Guohong Qiu
- Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
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14
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Khalifa Z, Zahran M, A-H Zahran M, Azzem MA. Mucilage-capped silver nanoparticles for glucose electrochemical sensing and fuel cell applications. RSC Adv 2020; 10:37675-37682. [PMID: 35515185 PMCID: PMC9057116 DOI: 10.1039/d0ra07359h] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 09/30/2020] [Indexed: 12/14/2022] Open
Abstract
A simple, cost-effective and green mucilage-capped silver nanoparticles (Mucilage-AgNPs) modified glassy carbon electrode (GC) composite was constructed for efficient and facile electrochemical oxidation of glucose for the first time. Mucilage-AgNPs were synthesized through the direct chemical reduction of Ag+ by mucilage extracted from Opuntia ficus-indica. Mucilage-AgNPs were identified and characterized using ultraviolet-visible spectroscopy, transmission electron microscopy and square wave voltammetry. Modification of the GC with AgNPs was carried out via a transfer-sticking technique with an immobilization time of 1 h. The Mucilage-AgNPs/GC composite was studied as a possible anode for glucose oxidation in a biofuel cell. The composite resulted in glucose oxidation with a current density and power density of 85.7 μA cm−2 and 25.7 μW cm−2, respectively. Glucose sensing using the Mucilage-AgNPs/GC composite was achieved successfully via two pathways: glucose oxidation and AgNP inhibition. The glucose oxidation-based sensor showed a lower detection limit of 0.01 mM and a linear range of 0.01 to 2.2 mM. The AgNPs inhibition-based sensor provides an indirect determination pathway of glucose with a detection limit of 0.1 mM and a linear range of 0.1 to 1.9 mM. AgNP inhibition is a novel pathway that could be used for determining a large number of organic and inorganic molecules. Overall, the Mucilage-AgNPs/GC is considered a pioneering composite for glucose sensing and fuel cell applications. A simple, cost-effective and green mucilage-capped silver nanoparticles (Mucilage-AgNPs) modified glassy carbon electrode (GC) composite was constructed for efficient and facile electrochemical oxidation of glucose for the first time.![]()
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Affiliation(s)
- Ziad Khalifa
- Chemical Engineering Deparetment
- Faculty of Engineering
- The British University in Egypt
- El Sherouk City
- Egypt
| | - Moustafa Zahran
- Department of Chemistry
- Faculty of Science
- El-Menoufia University
- Shibin El-Kom 32512
- Egypt
| | - Magdy A-H Zahran
- Department of Chemistry
- Faculty of Science
- El-Menoufia University
- Shibin El-Kom 32512
- Egypt
| | - Magdi Abdel Azzem
- Department of Chemistry
- Faculty of Science
- El-Menoufia University
- Shibin El-Kom 32512
- Egypt
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15
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Guo F, de Lima Stebbins D, Toomey RG, Alcantar NA. Interfacial Phenomena of Natural Dispersants for Crude Oil Spills. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:15904-15913. [PMID: 31607124 DOI: 10.1021/acs.langmuir.9b02036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A natural surfactant was studied to simulate the dispersion process of crude oil in water. The interfacial phenomena of this natural dispersant was compared with a commercially available chemical dispersant, COREXIT EC9500A. This functional surfactant was extracted from the mucilage of the Opuntia ficus-indica cactus species. The evaluation to determine the efficacy to disperse crude oil of the cactus-based mucilage extract (nongelling extract, NE) was based on characterizing surface and interfacial tension, dispersion efficiency, mixing effects, salinity effects, stability, and droplets size distributions. We found that surface tension values follow a linear relationship with respect to the natural logarithm of the concentrations of NE. The application of NE in the water phase led to decreasing oil/water interfacial tensions. Surface tension tests were also used to quantify the effect of oil-in-water (O/W) emulsion ratios once either natural or commercialized dispersants were added. A key finding of our work is that the surface tension between typical 6% and 3% v/v O/W emulsions was significantly reduced with the addition of discrete amounts of NE. This result indicated that the dynamic balance between O/W and water-in-oil (W/O) emulsions was thermodynamically more stable toward O/W emulsion states with NE. We also found that O/W emulsions with higher dispersion effectiveness were formed for both 10 and 35 practical salinity units, as the dispersant to oil ratios increased, with a significant correlation to the mixing energy. We observed that the O/W emulsions with natural dispersants had a significantly smaller weighted average diameter compared to those with COREXIT EC9500A. Such a phenomenon can be explained by understanding intermolecular interactions due to the structure and type of dispersant. In conclusion, cactus-based mucilage extracts could be used as environmentally benign dispersants and, therefore, reduce negative social perceptions of the application of dispersants to clean up spilled oil.
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Affiliation(s)
- Fei Guo
- Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , Florida 33620 , United States
| | - Daniela de Lima Stebbins
- Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , Florida 33620 , United States
| | - Ryan G Toomey
- Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , Florida 33620 , United States
| | - Norma A Alcantar
- Department of Chemical and Biomedical Engineering , University of South Florida , Tampa , Florida 33620 , United States
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16
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Sun J, Zhang X, Zhang A, Liao C. Preparation of Fe-Co based MOF-74 and its effective adsorption of arsenic from aqueous solution. J Environ Sci (China) 2019; 80:197-207. [PMID: 30952337 DOI: 10.1016/j.jes.2018.12.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/18/2018] [Accepted: 12/19/2018] [Indexed: 05/27/2023]
Abstract
To obtain a cost-effective adsorbent for the removal of arsenic in water, a novel nanostructured Fe-Co based metal organic framework (MOF-74) adsorbent was successfully prepared via a simple solvothermal method. The adsorption experiments showed that the optimal molar ratio of Fe/Co in the adsorbent was 2:1. The Fe2Co1 MOF-74 was characterized by various techniques and the results showed that the nanoparticle diameter ranged from 60 to 80 nm and the specific surface area was 147.82 m2/g. The isotherm and kinetic parameters of arsenic removal on Fe2Co1 MOF-74 were well-fitted by the Langmuir and pseudo-second-order models. The maximum adsorption capacities toward As(III) and As(V) were 266.52 and 292.29 mg/g, respectively. The presence of sulfate, carbonate and humic acid had no obvious effect on arsenic adsorption. However, coexisting phosphate significantly hindered the removal of arsenic, especially at high concentrations (10 mmol/L). Electrostatic interaction and hydroxyl and metal-oxygen groups played important roles in the adsorption of arsenic. Furthermore, the prepared adsorbent had stable adsorption ability after regeneration and when used in a real-water matrix. The excellent adsorption performance of Fe2Co1 MOF-74 material makes it a potentially promising adsorbent for the removal of arsenic.
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Affiliation(s)
- Jianqiang Sun
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaobing Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Anping Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Chunyang Liao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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17
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Yang Q, Lau CH, Ge Q. Novel Ionic Grafts That Enhance Arsenic Removal via Forward Osmosis. ACS APPLIED MATERIALS & INTERFACES 2019; 11:17828-17835. [PMID: 31002227 DOI: 10.1021/acsami.9b03991] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Current forward osmosis (FO) membranes are unsuitable for arsenic removal from water because of their poor arsenic selectivity. In this study, we designed and synthesized a series of novel imidazolium-based ionic liquids via one-step quaternization reactions and grafted these novel compounds on to conventional thin-film composite FO membranes for treatment of arsenic-containing water. The newly developed ionic membranes contained a functionalized selective polyamide layer grafted with either carboxylic acid/carboxylate or sulfonate groups that drastically enhanced membrane hydrophilicity and thus FO water permeation. Ionic membranes modified with sodium 1-ethanesulfonate-3-(3-aminopropyl) imidazolium bromide (NH2-IM-(CH2)2-SO3Na) outperformed pristine membranes with higher water recovery efficiency. Exceptional performance was achieved with this ionic membrane in FO arsenic removal with a water flux of 11.0 LMH and a rejection higher than 99.5% when 1000 ppm arsenic (HAsO42-) as the feed with a dilute NaCl solution (0.5 M) as the draw solution under the FO mode. Ionic membranes developed in this work facilitated FO for the treatment of arsenic-containing water while demonstrating its superiority over incumbent technologies with more efficient arsenic removal.
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Affiliation(s)
- Qiaoli Yang
- College of Environment and Resources , Fuzhou University , Fuzhou , Fujian 350116 , China
| | - Cher Hon Lau
- School of Engineering , The University of Edinburgh , Robert Stevenson Road, The King's Buildings , Edinburgh , EH9 3FB Scotland , U.K
| | - Qingchun Ge
- College of Environment and Resources , Fuzhou University , Fuzhou , Fujian 350116 , China
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18
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Wang D, Gilliland SE, Yi X, Logan K, Heitger DR, Lucas HR, Wang WN. Iron Mesh-Based Metal Organic Framework Filter for Efficient Arsenic Removal. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018. [PMID: 29513011 DOI: 10.1021/acs.est.7b06212] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Efficient oxidation from arsenite [As(III)] to arsenate [As(V)], which is less toxic and more readily to be adsorbed by adsorbents, is important for the remediation of arsenic pollution. In this paper, we report a metal organic framework (MIL-100(Fe)) filter to efficiently remove arsenic from synthetic groundwater. With commercially available iron mesh as a substrate, MIL-100(Fe) is implanted through an in situ growth method. MIL-100(Fe) is able to capture As(III) due to its microporous structure, superior surface area, and ample active sites for As adsorption. This approach increases the localized As concentration around the filter, where Fenton-like reactions are initiated by the Fe2+/Fe3+ sites within the MIL-100(Fe) framework to oxidize As(III) to As(V). The mechanism was confirmed by colorimetric detection of H2O2, fluorescence, and electron paramagnetic resonance detection of ·OH. With the aid of oxygen bubbling and Joule heating, the removal efficiency of As(III) can be further boosted. The MIL-100(Fe)-based filter also exhibits satisfactory structural stability and recyclability. Notably, the adsorption capacity of the filter can be regenerated satisfactorily. Our results demonstrate the potential of this filter for the efficient remediation of As contamination in groundwater.
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19
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Li B, Peng L, Wei D, Lei M, Liu B, Lin Y, Li Z, Gu J. Enhanced flocculation and sedimentation of trace cadmium from irrigation water using phosphoric fertilizer. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 601-602:485-492. [PMID: 28575827 DOI: 10.1016/j.scitotenv.2017.05.160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 05/16/2017] [Accepted: 05/17/2017] [Indexed: 06/07/2023]
Abstract
Suspended substrate (SS) in natural waters controls the interaction, transportation, and biological effects of heavy metals in water bodies. The large amount of cadmium (Cd) carried by SS is an important source of Cd pollution in irrigation water. In this study, a novel procedure to remove trace Cd coexisting with SS from irrigation water by fertilizer flocculation was investigated. Four common fertilizers (K2HPO4, (NH4)2HPO4, KH2PO4, and K2SO4) were used as flocculants. Batch experiments with various fertilizers revealed that the removal efficiency followed the order: K2HPO4>(NH4)2HPO4>KH2PO4>K2SO4. When levels of K2HPO4 higher than 0.75g/L were applied, the total Cd decreased from 20 to 3.8μg/L after 12h of flocculation, i.e., the removal efficiency reached 80%. The mechanism analysis(Zeta potential, multi-element analysis) results demonstrated that the aggregation of SS and its sedimentation by K2HPO4 were due to the combined effect of the oxidation of Fe2+ to Fe3+ and cation binding behavior towards SS, as a result of charge neutralization and electric double layer compression. This method of Cd removal from irrigation water is simple and has the potential to be applied in agricultural production.
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Affiliation(s)
- Bingyu Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Liang Peng
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China.
| | - Dongning Wei
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Ming Lei
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Bin Liu
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Yiqing Lin
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Zhiyi Li
- Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, PR China
| | - Jidong Gu
- Laboratory of Environmental Microbiology and Toxicology, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, SAR, PR China
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20
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Asere TG, Verbeken K, Tessema DA, Fufa F, Stevens CV, Du Laing G. Adsorption of As(III) versus As(V) from aqueous solutions by cerium-loaded volcanic rocks. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:20446-20458. [PMID: 28710726 DOI: 10.1007/s11356-017-9692-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 06/30/2017] [Indexed: 06/07/2023]
Abstract
Contamination of drinking water with arsenic causes severe health problems in various world regions. Arsenic exists predominantly as As(III) and As(V) depending on the prevailing redox conditions of the environment. Most of the techniques developed for treating As(V) are not very effective for As(III), which is more toxic and mobile than As(V). In this study, novel cerium-loaded pumice (Ce-Pu) and red scoria (Ce-Rs) adsorbents were developed to remove both As(III) and As(V) ions from water. The Ce-Pu and Ce-Rs adsorbents were characterized using ICP-OES, EDX, and SEM. The experimental equilibrium sorption data fitted well Freundlich and Dubinin-Radushkevich (D-R) isotherms. The adsorption was very fast and reached an equilibrium within 2 h. Both Ce-Rs and Ce-Pu showed high As(III) and As(V) removal efficiency in a wide pH range between 3 and 9, which is an important asset for practical applications. The Ce-Pu and Ce-Rs adsorbents can be recycled and used up to three adsorption cycles without significant loss of their original efficiency. Accordingly, Ce-Pu and Ce-Rs seem to be suitable for removal of arsenic from aqueous systems.
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Affiliation(s)
- Tsegaye Girma Asere
- Laboratory of Analytical Chemistry and Applied Ecochemistry, Ghent University (UGent), Coupure Links 653, 9000, Ghent, Belgium.
| | - Kim Verbeken
- Department of Materials Science and Engineering, Ghent University (UGent), Technologiepark 903, 9052, Zwijnaarde, Belgium
| | - Dejene A Tessema
- Southern Nations, Nationalities and Peoples' Region, Welkite University, Welkite, Ethiopia
| | - Fekadu Fufa
- Department of Water Resources and Environmental Engineering, Jimma University, P.O. Box 378, Jimma, Ethiopia
| | - Christian V Stevens
- Department of Sustainable Organic Chemistry and Technology, Ghent University, Campus Coupure, Coupure Links 653, 9000, Ghent, Belgium
| | - Gijs Du Laing
- Laboratory of Analytical Chemistry and Applied Ecochemistry, Ghent University (UGent), Coupure Links 653, 9000, Ghent, Belgium
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21
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Bhalkaran S, Wilson LD. Investigation of Self-Assembly Processes for Chitosan-Based Coagulant-Flocculant Systems: A Mini-Review. Int J Mol Sci 2016; 17:ijms17101662. [PMID: 27706052 PMCID: PMC5085695 DOI: 10.3390/ijms17101662] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 09/07/2016] [Accepted: 09/23/2016] [Indexed: 11/22/2022] Open
Abstract
The presence of contaminants in wastewater poses significant challenges to water treatment processes and environmental remediation. The use of coagulation-flocculation represents a facile and efficient way of removing charged particles from water. The formation of stable colloidal flocs is necessary for floc aggregation and, hence, their subsequent removal. Aggregation occurs when these flocs form extended networks through the self-assembly of polyelectrolytes, such as the amine-based polysaccharide (chitosan), which form polymer “bridges” in a floc network. The aim of this overview is to evaluate how the self-assembly process of chitosan and its derivatives is influenced by factors related to the morphology of chitosan (flocculant) and the role of the solution conditions in the flocculation properties of chitosan and its modified forms. Chitosan has been used alone or in conjunction with a salt, such as aluminum sulphate, as an aid for the removal of various waterborne contaminants. Modified chitosan relates to grafted anionic or cationic groups onto the C-6 hydroxyl group or the amine group at C-2 on the glucosamine monomer of chitosan. By varying the parameters, such as molecular weight and the degree of deacetylation of chitosan, pH, reaction and settling time, dosage and temperature, self-assembly can be further investigated. This mini-review places an emphasis on the molecular-level details of the flocculation and the self-assembly processes for the marine-based biopolymer, chitosan.
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Affiliation(s)
- Savi Bhalkaran
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
| | - Lee D Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
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