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Chormey DS, Zaman BT, Borahan Kustanto T, Erarpat Bodur S, Bodur S, Tekin Z, Nejati O, Bakırdere S. Biogenic synthesis of novel nanomaterials and their applications. NANOSCALE 2023; 15:19423-19447. [PMID: 38018389 DOI: 10.1039/d3nr03843b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Despite the many benefits derived from the unique features and practicality of nanoparticles, the release of their toxic by-products or products from the synthesis stage into the environment could negatively impact natural resources and organisms. The physical and chemical methods for nanoparticle synthesis involve high energy consumption and the use of hazardous chemicals, respectively, going against the principles of green chemistry. Biological methods of synthesis that rely on extracts from a broad range of natural plants, and microorganisms, such as fungi, bacteria, algae, and yeast, have emerged as viable alternatives to the physical and chemical methods. Nanoparticles synthesized through biogenic pathways are particularly useful for biological applications that have high concerns about contamination. Herein, we review the physical and chemical methods of nanoparticle synthesis and present a detailed overview of the biogenic methods used for the synthesis of different nanoparticles. The major points discussed in this study are the following: (1) the fundamentals of the physical and chemical methods of nanoparticle syntheses, (2) the use of different biological precursors (microorganisms and plant extracts) to synthesize gold, silver, selenium, iron, and other metal nanoparticles, and (3) the applications of biogenic nanoparticles in diverse fields of study, including the environment, health, material science, and analytical chemistry.
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Affiliation(s)
- Dotse Selali Chormey
- Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Türkiye.
- Neutec Pharmaceutical, Yıldız Technical University Teknopark, 34220, İstanbul, Türkiye
| | - Buse Tuğba Zaman
- Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Türkiye.
| | - Tülay Borahan Kustanto
- Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Türkiye.
- Neutec Pharmaceutical, Yıldız Technical University Teknopark, 34220, İstanbul, Türkiye
| | - Sezin Erarpat Bodur
- Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Türkiye.
| | - Süleyman Bodur
- Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Türkiye.
- İstinye University, Faculty of Pharmacy, Department of Analytical Chemistry, 34010 İstanbul, Türkiye
- İstinye University, Scientific and Technological Research Application and Research Center, 34010 İstanbul, Türkiye
| | - Zeynep Tekin
- Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Türkiye.
- Neutec Pharmaceutical, Yıldız Technical University Teknopark, 34220, İstanbul, Türkiye
| | - Omid Nejati
- İstinye University, Institute of Health Sciences, Department of Stem Cell and Tissue Engineering, 34010, İstanbul, Türkiye
| | - Sezgin Bakırdere
- Yıldız Technical University, Department of Chemistry, 34220 İstanbul, Türkiye.
- Turkish Academy of Sciences (TÜBA), Vedat Dalokay Street, No: 112, 06670, Çankaya, 06670, Ankara, Türkiye
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Mills R, Tvrdik C, Lin A, Bhattacharyya D. Enhanced Degradation of Methyl Orange and Trichloroethylene with PNIPAm-PMMA-Fe/Pd-Functionalized Hollow Fiber Membranes. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2041. [PMID: 37513052 PMCID: PMC10386459 DOI: 10.3390/nano13142041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/30/2023]
Abstract
Trichloroethylene (TCE) is a prominent groundwater pollutant due to its stability, widespread contamination, and negative health effects upon human exposure; thus, an immense need exists for enhanced environmental remediation techniques. Temperature-responsive domains and catalyst incorporation in membrane domains bring significant advantages for toxic organic decontamination. In this study, hollow fiber membranes (HFMs) were functionalized with stimuli-responsive poly-N-isopropylacrylamide (PNIPAm), poly-methyl methacrylate (PMMA), and catalytic zero-valent iron/palladium (Fe/Pd) for heightened reductive degradation of such pollutants, utilizing methyl orange (MO) as a model compound. By utilizing PNIPAm's transition from hydrophilic to hydrophobic expression above the LCST of 32 °C, increased pollutant diffusion and adsorption to the catalyst active sites were achieved. PNIPAm-PMMA hydrogels exhibited 11.5× and 10.8× higher equilibrium adsorption values for MO and TCE, respectively, when transitioning from 23 °C to 40 °C. With dip-coated PNIPAm-PMMA-functionalized HFMs (weight gain: ~15%) containing Fe/Pd nanoparticles (dp~34.8 nm), surface area-normalized rate constants for batch degradation were determined, resulting in a 30% and 420% increase in degradation efficiency above 32 °C for MO and TCE, respectively, due to enhanced sorption on the hydrophobic PNIPAm domain. Overall, with functionalized membranes containing superior surface area-to-volume ratios and enhanced sorption sites, efficient treatment of high-volume contaminated water can be achieved.
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Affiliation(s)
- Rollie Mills
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40508, USA
| | - Cameron Tvrdik
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40508, USA
| | - Andrew Lin
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40508, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40508, USA
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Mbarek WB, Escoda L, Saurina J, Pineda E, Alminderej FM, Khitouni M, Suñol JJ. Nanomaterials as a Sustainable Choice for Treating Wastewater: A Review. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8576. [PMID: 36500069 PMCID: PMC9737022 DOI: 10.3390/ma15238576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/23/2022] [Accepted: 11/28/2022] [Indexed: 06/15/2023]
Abstract
The removal of dyes from textile effluents utilizing advanced wastewater treatment methods with high efficiency and low cost has received substantial attention due to the rise in pollutants in water. The purpose of this work is to give a comprehensive analysis of the different treatments for removing chemical dyes from textile effluents. The capability and potential of conventional treatments for the degradation of dyeing compounds in aqueous media, as well as the influence of multiple parameters, such as the pH solution, initial dye concentration, and adsorbent dose, are presented in this study. This study is an overview of the scientific research literature on this topic, including nanoreductive and nanophotocatalyst processes, as well as nanoadsorbents and nanomembranes. For the purpose of treating sewage, the special properties of nanoparticles are currently being carefully researched. The ability of nanomaterials to remove organic matter, fungus, and viruses from wastewater is another benefit. Nanomaterials are employed in advanced oxidation techniques to clean wastewater. Additionally, because of their small dimensions, nanoparticles have a wide effective area of contact. Due to this, nanoparticles' adsorption and reactivity are powerful. The improvement of nanomaterial technology will be beneficial for the treatment of wastewater. This report also offers a thorough review of the distinctive properties of nanomaterials used in wastewater treatment, as well as their appropriate application and future possibilities. Since only a few types of nanomaterials have been produced, it is also important to focus on their technological feasibility in addition to their economic feasibility. According to this study, nanoparticles (NPs) have a significant adsorption area, efficient chemical reactions, and electrical conductivity that help treat wastewater effectively.
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Affiliation(s)
- Wael Ben Mbarek
- Department of Physics, Campus Montilivi s/n, University of Girona, 17003 Girona, Spain
| | - Lluisa Escoda
- Department of Physics, Campus Montilivi s/n, University of Girona, 17003 Girona, Spain
| | - Joan Saurina
- Department of Physics, Campus Montilivi s/n, University of Girona, 17003 Girona, Spain
| | - Eloi Pineda
- Department of Physics, Institute of Energy Technologies, Universitat Politècnica de Catalunya, 08019 Barcelona, Spain
| | - Fahad M. Alminderej
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
| | - Mohamed Khitouni
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
| | - Joan-Josep Suñol
- Department of Physics, Campus Montilivi s/n, University of Girona, 17003 Girona, Spain
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4
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Facile preparation of iron-anchored graphite cloth through salt immersion and sintering approaches and its application to the electro-Fenton catalytic system as a cathode. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02258-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Synthesis and Characterization of Zero-Valent Fe-Cu and Fe-Ni Bimetals for the Dehalogenation of Trichloroethylene Vapors. SUSTAINABILITY 2022. [DOI: 10.3390/su14137760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In this study, zero-valent iron-copper (Fe-Cu) and iron-nickel (Fe-Ni) bimetals were prepared by disc milling for the dehalogenation of trichloroethylene vapors. For both Fe-Ni and Fe-Cu, three combinations in terms of percentage of secondary metal added were produced (1%, 5%, 20% by weight) and the formation of the bimetallic phase by milling was evaluated by X-ray diffraction (XRD) analysis. The disc milled bimetals were characterized by a homogenous distribution of Ni or Cu in the Fe phase and micrometric size visible from scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) analysis and by a relatively low specific surface area (0.2–0.7 m2/g) quantified by the Brunauer–Emmett–Teller (BET) method. The reactivity of the produced bimetals was evaluated by batch degradation tests of TCE in the gas phase with 1 day of reaction time. Fe-Ni bimetals have shown better performance in terms of TCE removal (57–75%) than Fe-Cu bimetals (41–55%). The similar specific surface area values found for the produced bimetals indicated that the enhancement in the dehalogenation achieved using bimetals is closely related to the induced catalysis. The obtained results suggest that ZVI-based bimetals produced by disc milling are effective in the dehalogenation of TCE vapors in partially saturated conditions.
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Yang C, Li K, Xu L, Wang Z, Yu L, Wang J. Reduction of nitrobenzene by a zero-valent iron microspheres/polyvinylidene fluoride (mZVI/PVDF) membrane. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120006] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Rasheed T, Rizwan K, Bilal M, Sher F, Iqbal HMN. Tailored functional materials as robust candidates to mitigate pesticides in aqueous matrices-a review. CHEMOSPHERE 2021; 282:131056. [PMID: 34111632 DOI: 10.1016/j.chemosphere.2021.131056] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 05/09/2021] [Accepted: 05/28/2021] [Indexed: 02/08/2023]
Abstract
Pesticides are among the top-priority contaminants, which significantly contribute to environmental deterioration. Conventional techniques are not efficient enough to remove pollutants from environmental matrices. The development of functional materials has emerged as promising candidates to remove and degrade pesticides and related hazardous compounds. Furthermore, the nanohybrid materials with unique structural and functional characteristics, such as better material anchorage, mass transfer, electron-hole separation, and charged interaction make them a versatile option to treat and reduce pollutants from aqueous matrices. Herein, we present the current progress in the development of functional materials for the abatement of toxic pesticides. The physicochemical characteristics and pesticide-removal functionalities of various metallic functional materials (e.g., zirconium, zinc, titanium, tungsten, and iron), polymer, and carbon-based materials are critically discussed with suitable examples. Finally, the industrial-scale applications of the functional materials, concluding remarks, and future directions in this important arena are given.
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Affiliation(s)
- Tahir Rasheed
- School of Chemistry, and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Komal Rizwan
- Department of Chemistry University of Sahiwal, Sahiwal, 57000, Pakistan.
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Farooq Sher
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Science, Campus Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey, N.L., CP 64849, Mexico
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Ali Moloudi, Ali Reza Zarei. Adsorptive Degradation of Perchlorate as a Persistent Inorganic Pollutant (PIP) from Industrial Wastewater Using of a Novel Reducing Magnetic Organoclay: Toward Facile Removal of Perchlorate. J WATER CHEM TECHNO+ 2021. [DOI: 10.3103/s1063455x21040093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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The Effect of Shape-Controlled Pt and Pd Nanoparticles on Selective Catalytic Hydrodechlorination of Trichloroethylene. Catalysts 2020. [DOI: 10.3390/catal10111314] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Tailoring the shape of nanoscale materials enables obtaining morphology-controlled surfaces exhibiting specific interactions with reactants during catalytic reactions. The specifics of nanoparticle surfaces control the catalytic performance, i.e., activity and selectivity. In this study, shape-controlled Platinum (Pt) and Palladium (Pd) nanoparticles with distinct morphology were produced, i.e., cubes and cuboctahedra for Pt and spheres and polyhedra/multiple-twins for Pd, with (100), (111 + 100), curved/stepped and (111) facets, respectively. These particles with well-tuned surfaces were subsequently deposited on a Zirconium oxide (ZrO2) support. The morphological characteristics of the particles were determined by high resolution transmission electron microscopy (HR-TEM) and X-ray diffraction (XRD), while their adsorption properties were investigated by Fourier transform infrared spectroscopy (FTIR) of CO adsorbed at room temperature. The effect of the nanoparticle shape and surface structure on the catalytic performance in hydrodechlorination (HDCl) of trichloroethylene (TCE) was examined. The results show that nanoparticles with different surface orientations can be employed to affect selectivity, with polyhedral and multiply-twinned Pd exhibiting the best ethylene selectivity.
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Saad A, Mills R, Wan H, Ormsbee L, Bhattacharyya D. Thermoresponsive PNIPAm–PMMA-Functionalized PVDF Membranes with Reactive Fe–Pd Nanoparticles for PCB Degradation. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03260] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anthony Saad
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Rollie Mills
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, United States
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Hou X, Chen X, Bi S, Li K, Zhang C, Wang J, Zhang W. Catalytic degradation of TCE by a PVDF membrane with Pd-coated nanoscale zero-valent iron reductant. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 702:135030. [PMID: 31715394 DOI: 10.1016/j.scitotenv.2019.135030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 10/13/2019] [Accepted: 10/16/2019] [Indexed: 06/10/2023]
Abstract
Trichloroethylene (TCE) has serious threat to ecosystem. Fe-Pd nanoparticles (NPs) are good materials for catalytic degradation of TCE but still face severe challenges including easy fouling, agglomeration, deactivation and difficult separation and reuse etc. To overcome these drawbacks, we have constructed a novel structured PVDF/Fe-Pd NPs composite membrane with nanosized surface pores to execute the TCE degradation. Results indicate the degradation shows pseudo first-order reaction kinetics and high degradation rate in the static state degradation. Furthermore, the degradation ability can be enhanced by increasing Fe and Pd contents, the degradation temperature or decreasing the degradation pH value. However, the degradation is essentially limited by the diffusion. Thus, the cross-flow degradation is further applied to promote the diffusion. By this operating model, the degradation ability of the composite membrane can be greatly improved. More importantly, the reactants always keep the purity in the membrane surface side and can be controlled to enter the membrane pore for catalytic degradation. Thus, products can be timely discharged via the membrane pores and the side reactions between reactants and products can be largely reduced. In addition, the nanosized surface pores can also prevent the Fe-Pd NPs from being fouled. In a word, the novel composite membrane shows strong degradation ability, good stability and convenient operating ability for the TEC catalytic degradation.
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Affiliation(s)
- Xiaolu Hou
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Xi Chen
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Shiyin Bi
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Kun Li
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Chenghao Zhang
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Jianzu Wang
- State Key Laboratory of Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Wangqing Zhang
- Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, PR China
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Wan H, Islam MS, Briot NJ, Schnobrich M, Pacholik L, Ormsbee L, Bhattacharyya D. Pd/Fe nanoparticle integrated PMAA-PVDF membranes for chloro-organic remediation from synthetic and site groundwater. J Memb Sci 2020; 594:117454. [PMID: 31929677 PMCID: PMC6953629 DOI: 10.1016/j.memsci.2019.117454] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The poly(methacrylic acid) (PMAA) was synthesized in the pores of commercial microfiltration PVDF membranes to allow incorporation of catalytic palladium/iron (Pd/Fe) nanoparticles for groundwater remediation. Particles of 17.1 ± 4.9 nm size were observed throughout the pores of membranes using a focused ion beam. To understand the role of Pd fractions and particle compositions, 2-chlorobiphenyl was used as a model compound in solution phase studies. Results show H2 production (Fe0 corrosion in water) is a function of Pd coverage on the Fe. Insufficient H2 production caused by higher coverage (> 10.4% for 5.5 wt%) hindered dechlorination rate. With 0.5 wt% Pd, palladized-Fe reaction rate (surface area normalized reaction rate, ksa = 0.12 L/(m2-h) was considerably higher than isolated Pd and Fe particles. For groundwater, in a single pass of Pd/Fe-PMAA-PVDF membranes (0.5 wt% Pd), chlorinated organics, such as trichloroethylene (177 ppb) and carbon tetrachloride (35 ppb), were degraded to 16 and 0.3 ppb, respectively, at 2.2 seconds of residence time. The degradation rate (observed ksa) followed the order of carbon tetrachloride > trichloroethylene > tetrachloroethylene > chloroform. A 36 h continuous flow study with organic mixture and the regeneration process show the potential for on-site remediation.
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Affiliation(s)
- Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Md Saiful Islam
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Nicolas J Briot
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
| | | | - Lucy Pacholik
- Department of Civil Engineering University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Lindell Ormsbee
- Department of Civil Engineering University of Kentucky, Lexington, KY, 40506-0046, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506-0046, USA
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Iron-nickel bimetallic nanoparticles: Surfactant assisted synthesis and their catalytic activities. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Debnath D, Gupta AK, Ghosal PS. Recent advances in the development of tailored functional materials for the treatment of pesticides in aqueous media: A review. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.10.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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15
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Biswas K, Chattopadhyay S, Jing Y, Che R, De G, Basu B, Zhao D. Polyionic Resin Supported Pd/Fe2O3Nanohybrids for Catalytic Hydrodehalogenation: Improved and Versatile Remediation for Toxic Pollutants. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b04464] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kinkar Biswas
- Department of Chemistry, North Bengal University, Darjeeling 734013, India
| | - Shreyasi Chattopadhyay
- CSIR−Central Glass & Ceramics Research Institute, 196 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Yunke Jing
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Advanced Materials Laboratory, Fudan University, Shanghai 200433, P. R. China
| | - Renchao Che
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Advanced Materials Laboratory, Fudan University, Shanghai 200433, P. R. China
| | - Goutam De
- CSIR−Central Glass & Ceramics Research Institute, 196 Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
- Institute of Nano Science and Technology, Mohali 166062, Punjab, India
| | - Basudeb Basu
- Department of Chemistry, North Bengal University, Darjeeling 734013, India
- Raiganj University, Raiganj 733134, India
| | - Dongyuan Zhao
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers and Advanced Materials Laboratory, Fudan University, Shanghai 200433, P. R. China
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Han Y, Liu C, Horita J, Yan W. Trichloroethene (TCE) hydrodechlorination by NiFe nanoparticles: Influence of aqueous anions on catalytic pathways. CHEMOSPHERE 2018; 205:404-413. [PMID: 29704848 DOI: 10.1016/j.chemosphere.2018.04.083] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 04/13/2018] [Accepted: 04/14/2018] [Indexed: 06/08/2023]
Abstract
Amending bulk and nanoscale zero-valent iron (ZVI) with catalytic metals significantly accelerates hydrodechlorination of groundwater contaminants such as trichloroethene (TCE). The bimetallic design benefits from a strong synergy between Ni and Fe in facilitating the production of active hydrogen for TCE reduction, and it is of research and practical interest to understand the impacts of common groundwater solutes on catalyst and ZVI functionality. In this study, TCE hydrodechlorination reaction was conducted using fresh NiFe bimetallic nanoparticles (NiFe BNPs) and those aged in chloride, sulfate, phosphate, and humic acid solutions with concurrent analysis of carbon fractionation of TCE and its daughter products. The apparent kinetics suggest that the reactivity of NiFe BNPs is relatively stable in pure water and chloride or humic acid solutions, in contrast to significant deactivation observed of PdFe bimetallic particles in similar media. Exposure to phosphate at greater than 0.1 mM led to a severe decrease in TCE reaction rate. The change in kinetic regimes from first to zeroth order with increasing phosphate concentration is consistent with consumption of reactive sites by phosphate. Despite severe kinetic effect, there is no significant shift in TCE 13C bulk enrichment factor between the fresh and the phosphate-aged particles. Instead, pronounced retardation of TCE reaction by NiFe BNPs in deuterated water (D2O) points to the importance of hydrogen spillover in controlling TCE reduction rate by NiFe BNPs, and such process can be strongly affected by groundwater chemistry.
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Affiliation(s)
- Yanlai Han
- Department of Civil, Environmental and Construction Engineering, Texas Tech University, 10th and Akron, Lubbock, TX 79409, USA
| | - Changjie Liu
- Department of Geosciences, Texas Tech University, 10th and Akron, Lubbock, TX 79409, USA
| | - Juske Horita
- Department of Geosciences, Texas Tech University, 10th and Akron, Lubbock, TX 79409, USA
| | - Weile Yan
- Department of Civil, Environmental and Construction Engineering, Texas Tech University, 10th and Akron, Lubbock, TX 79409, USA.
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Jin X, Li Q, Yang Q. The reactivity of Fe/Ni colloid stabilized by carboxymethylcellulose (CMC-Fe/Ni) toward chloroform. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:21049-21057. [PMID: 29767309 DOI: 10.1007/s11356-018-2030-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
The use of stabilizers can prevent the reactivity loss of nanoparticles due to aggregation. In this study, carboxymethylcellulose (CMC) was selected as the stabilizer to synthesize a highly stable CMC-stabilized Fe/Ni colloid (CMC-Fe/Ni) via pre-aggregation stabilization. The reactivity of CMC-Fe/Ni was evaluated via the reaction of chloroform (CF) degradation. The effect of background solution which composition was affected by the preparation of Fe/Ni (Fe/Ni precursors, NaBH4 dosage) and the addition of solute (common ions, sulfur compounds) on the reactivity of CMC-Fe/Ni was also investigated. Additionally, the dried CMC-Fe/Ni was used for characterization in terms of scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The experimental results indicated that CMC stabilization greatly improved the reactivity of Fe/Ni bimetal and CF (10 mg/L) could be completely degraded by CMC-Fe/Ni (0.1 g/L) within 45 min. The use of different Fe/Ni precursors resulting in the variations of background solution seemed to have no obvious influence on the reactivity of CMC-Fe/Ni, whereas the dosage of NaBH4 in background solution showed a negative correlation with the reactivity of CMC-Fe/Ni. Besides, the individual addition of external solutes into background solution all had an adverse effect on the reactivity of CMC-Fe/Ni, of which the poisoning effect of sulfides (Na2S, Na2S2O4) was significant than common ions and sulfite.
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Affiliation(s)
- Xin Jin
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Qun Li
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China
| | - Qi Yang
- Beijing Key Laboratory of Water Resources & Environmental Engineering, China University of Geosciences (Beijing), Beijing, 100083, People's Republic of China.
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Islam MS, Hernández S, Wan H, Ormsbee L, Bhattacharyya D. Role of membrane pore polymerization conditions for pH responsive behavior, catalytic metal nanoparticle synthesis, and PCB degradation. J Memb Sci 2018; 555:348-361. [PMID: 30718939 PMCID: PMC6358284 DOI: 10.1016/j.memsci.2018.03.060] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This article describes the effects of changing monomer and cross-linker concentrations on the mass gain, water permeability, Pd-Fe nanoparticle (NP) loading, and the rate of degradation of 3,3',4,4',5-pentachlorobiphenyl (PCB 126) of pore functionalized polyvinylidene fluoride (PVDF) membranes. In this study, monomer (acrylic acid (AA)) and cross-linker (N, N'- methylene-bis (acrylamide)) concentrations were varied from 10 to 20 wt% of polymer solution and 0.5-2 mol% of monomer concentration, respectively. Results showed that responsive behavior of membrane could be tuned in terms of water permeability over a range of 270-1 L m-2 h-1 bar-1, which is a function of water pH. The NP size on the membrane surface was found in the range of 16-23 nm. With increasing cross-linker density the percentage of smaller NPs (< 10 nm) increases due to smaller mesh size formation during in-situ polymerization of membrane. NP loading was found to vary from 0.21 to 0.94 mg per cm2 of membrane area depending on the variation of available carboxyl groups in membrane pore domain. The NPs functionalized membranes were then tested for use as a platform for the degradation of PCB 126. The observed batch reaction rate (Kobs) for PCB 126 degradation for per mg of catalyst loading was found 0.08-0.1 h-1. Degradation study in convective flow mode shows 98.6% PCB 126 is degraded at a residence time of 46.2 s. The corresponding surface area normalized reaction rate (K sa ) is found about two times higher than K sa of batch degradation; suggesting elimination of the effect of diffusion resistance for degradation of PCB 126 in convective flow mode operation. These Pd-Fe-PAA-PVDF membranes and nanoparticles are characterized by TGA, contact angle measurement, surface zeta potential, XRD, SEM, XPS, FIB, TEM and other techniques reveal the details about the membrane surface, pores and nanoparticles size, shape and size-distribution. Statistical analysis based on experimental results allows us to depict responsive behavior of functionalized membrane. In our best knowledge this paper first time reports detail study on responsive behavior of pore functionalized membrane in terms of permeability, NPs size, metal loading and its effect on PCB 126 degradation in a quantified approach.
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Affiliation(s)
- Md. Saiful Islam
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
| | - Sebastián Hernández
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
| | - Hongyi Wan
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
| | - Lindell Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower Building, Lexington, KY 40506, USA
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19
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20
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Ling L, Zhang WX. Visualizing Arsenate Reactions and Encapsulation in a Single Zero-Valent Iron Nanoparticle. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2288-2294. [PMID: 28081365 DOI: 10.1021/acs.est.6b04315] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A nanostructure-based mechanism is presented on the enrichment, separation, and immobilization of arsenic with nanoscale zero-valent iron (nZVI). The As-Fe reactions are studied with spherical aberration corrected scanning transmission electron microscopy (Cs-STEM). Near-atomic resolution (<1 nm3) electron tomography discovers a thin continuous layer (23 ± 3 Å) of elemental arsenic sandwiched between the iron oxide shell and the zerovalent iron core. This points to a unique mechanism of nanoencapsulation and proves that the outer layer, especially the Fe(0)-oxide interface, is the edge of the As-Fe reactions. Atomic-resolution imaging on the grain boundary provides strong evidence that arsenic atoms diffuse preferably along the nonequilibrium, high-energy, and defective polycrystalline grain boundary of iron oxides. Results also offer direct evidence on the surface sorption or surface complex formation of arsenate on ferric hydroxide (FeOOH). The core-shell structure and unique properties of nZVI clearly underline rapid separation, large capacity, and stability for the treatment of toxic heavy metals such as cadmium, chromium, arsenic, and uranium.
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Affiliation(s)
- Lan Ling
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University , 1239 Siping Road, Shanghai 200092, China
| | - Wei-Xian Zhang
- State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Tongji University , 1239 Siping Road, Shanghai 200092, China
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21
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Zhang W, Jia N, Han X, Qiu Z, Lv S, Lin K, Ying W. A comparison of the dechlorination mechanisms and Ni release styles of chloroalkane and chloroalkene removal using nickel/iron nanoparticles. ENVIRONMENTAL TECHNOLOGY 2016; 37:2088-2098. [PMID: 26776083 DOI: 10.1080/09593330.2016.1141998] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this study, we compared the removal kinetics and Ni release styles of 1,1,1-trichloroethane (1,1,1-TCA), trichloroethylene (TCE), and tetrachloroethene (PCE) that result from the use of Ni/Fe nanoparticles in water. Compared to TCE and PCE, 1,1,1-TCA was more readily removed, and the concentration profiles of the three chlorinated aliphatic hydrocarbons (CAHs) during the reduction processes fit pseudo-first-order reaction rate models well. The surface area-normalized rate constants show that the 11% Ni Ni/Fe nanoparticles, which has the largest Brunauer-Emmett-Teller surface area, has the highest capacity for 1,1,1-TCA removal per unit surface area and that the 6% Ni sample was the best for removing TCE and PCE. The observed by-products suggested that hydrogenolysis was responsible for the dechlorination of CAHs in the presence of Ni/Fe nanoparticles. More Ni2+ was released during the degradation of 1,1,1-TCA than that of TCE and PCE because Ni will reduce the CAHs directly as a zerovalent metal does when hydrogen atoms in the Ni lattice are not sufficient due to the rapid incomplete dechlorination of 1,1,1-TCA. The different modes of adsorption of chloroalkane and chloroalkene onto the surfaces of Ni/Fe particles might play an important role in their dechlorination process.
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Affiliation(s)
- Wei Zhang
- a State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process , School of Resources and Environmental Engineering, East China University of Science and Technology , Shanghai , People's Republic of China
| | - Nan Jia
- a State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process , School of Resources and Environmental Engineering, East China University of Science and Technology , Shanghai , People's Republic of China
| | - Xiaolin Han
- a State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process , School of Resources and Environmental Engineering, East China University of Science and Technology , Shanghai , People's Republic of China
| | - Zhaofu Qiu
- a State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process , School of Resources and Environmental Engineering, East China University of Science and Technology , Shanghai , People's Republic of China
| | - Shuguang Lv
- a State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process , School of Resources and Environmental Engineering, East China University of Science and Technology , Shanghai , People's Republic of China
| | - Kuangfei Lin
- a State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process , School of Resources and Environmental Engineering, East China University of Science and Technology , Shanghai , People's Republic of China
| | - Weichi Ying
- a State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process , School of Resources and Environmental Engineering, East China University of Science and Technology , Shanghai , People's Republic of China
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Enhancement of Degradation and Dechlorination of Trichloroethylene via Supporting Palladium/Iron Bimetallic Nanoparticles onto Mesoporous Silica. Catalysts 2016. [DOI: 10.3390/catal6070105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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23
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Mokhov VM, Popov YV, Nebykov DN. Hydrogenation of alkenes over nickel nanoparticles under atmospheric pressure of hydrogen. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2016. [DOI: 10.1134/s1070428016030040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Zha XS, Ma L, Liu Y. Reductive dehalogenation of brominated disinfection byproducts by iron based bimetallic systems. RSC Adv 2016. [DOI: 10.1039/c5ra26882f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Increasing the dosage and decreasing the pH values was favorable for the reductive dehalogenation of Br-DBPs. Pd/Fe had a higher potential gradient (1.4 V) than Cu/Fe (0.8 V). The toxicity of samples had a notable decline after the reaction.
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Affiliation(s)
- Xiao-song Zha
- Department of Environmental Science and Engineering
- Fudan University
- Shanghai 200433
- China
| | - Luming Ma
- College of Environmental Science and Engineering
- Tongji University
- Shanghai 200092
- China
| | - Yan Liu
- Department of Environmental Science and Engineering
- Fudan University
- Shanghai 200433
- China
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25
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Gui M, Papp JK, Colburn AS, Meeks ND, Weaver B, Wilf I, Bhattacharyya D. Engineered Iron/Iron Oxide Functionalized Membranes for Selenium and Other Toxic Metal Removal from Power Plant Scrubber Water. J Memb Sci 2015; 488:79-91. [PMID: 26327740 PMCID: PMC4552196 DOI: 10.1016/j.memsci.2015.03.089] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The remediation of toxic metals from water with high concentrations of salt has been an emerging area for membrane separation. Cost-effective nanomaterials such as iron and iron oxide nanoparticles have been widely used in reductive and oxidative degradation of toxic organics. Similar procedures can be used for redox transformations of metal species (e.g. metal oxyanions to elemental metal), and/or adsorption of species on iron oxide surface. In this study, iron-functionalized membranes were developed for reduction and adsorption of selenium from coal-fired power plant scrubber water. Iron-functionalized membranes have advantages over iron suspension as the membrane prevents particle aggregation and dissolution. Both lab-scale and full-scale membranes were prepared first by coating polyvinylidene fluoride (PVDF) membranes with polyacrylic acid (PAA), followed by ion exchange of ferrous ions and subsequent reduction to zero-valent iron nanoparticles. Water permeability of membrane decreased as the percent PAA functionalization increased, and the highest ion exchange capacity (IEC) was obtained at 20% PAA with highly pH responsive pores. Although high concentrations of sulfate and chloride in scrubber water decreased the reaction rate of selenium reduction, this was shown to be overcome by integration of nanofiltration (NF) and iron-functionalized membranes, and selenium concentration below 10 μg/L was achieved.
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Affiliation(s)
- Minghui Gui
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Joseph K. Papp
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Andrew S. Colburn
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Noah D. Meeks
- Southern Company Services, Inc., Birmingham, AL 35203, USA
| | | | - Ilan Wilf
- Nanostone/Sepro Membranes, Inc., Oceanside, CA 92056, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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26
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Han Y, Yan W. Bimetallic nickel-iron nanoparticles for groundwater decontamination: effect of groundwater constituents on surface deactivation. WATER RESEARCH 2014; 66:149-159. [PMID: 25201338 DOI: 10.1016/j.watres.2014.08.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/05/2014] [Accepted: 08/03/2014] [Indexed: 06/03/2023]
Abstract
The incorporation of catalytic metals on iron nanoparticles to form bimetallic nanoparticles (BNPs) generates a class of highly reactive materials for degrading chlorinated hydrocarbons (e.g., trichloroethylene, TCE) in groundwater. Successful implementation of BNPs to groundwater decontamination relies critically on the stability of surface reactive sites of BNPs in groundwater matrices. This study investigated the effect of common groundwater solutes on TCE reduction with Ni-Fe (with Ni at 2 wt.%) bimetallic nanoparticles (herein denoted as Ni-Fe BNPs). Batch experiments involving pre-exposing the nanoparticles to various groundwater solutions for 24 h followed by reactions with TCE solutions were conducted. The results suggest that the deactivation behavior of Ni-Fe BNPs differs significantly from that of the well-studied Pd-Fe BNPs. Specifically, Ni-Fe BNPs were chemically stable in pure water. Mild reduction in TCE reaction rates were observed for Ni-Fe BNPs pre-exposed to chloride (Cl(-)), bicarbonate (HCO3(-)), sulfite (SO3(2-)) and humic acid solutions. Nitrate (NO3(-)), sulfate (SO4(2-)) and phosphate (HPO4(2-)) may cause moderate to severe deactivation at elevated concentrations (>1 mM). Product analysis and surface chemistry investigations using high-resolution X-ray photoelectron spectroscopy (HR-XPS) reveal that NO3(-) decreased particle reactivity mainly due to progressive formation of passivating oxides, whereas SO4(2-) and phosphate elicited rapid deactivation as a result of specific poisoning of the surface nickel sites. At similar levels, phosphate is the most potent deactivation agent among the solutes examined in this study. While our findings point out the desirable quality of Ni-Fe nanoparticles, particularly their greater electrochemical stability compared to Pd-Fe BNPs, its susceptibility to chemical poisoning at high levels of complexing ligands is also noted. Groundwater chemistry is therefore an important factor to consider when choosing appropriate material(s) for decontaminating the complex environmental media.
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Affiliation(s)
- Yanlai Han
- Department of Civil and Environmental Engineering, Texas Tech University, 10th and Akron, Lubbock, TX 79409, USA
| | - Weile Yan
- Department of Civil and Environmental Engineering, Texas Tech University, 10th and Akron, Lubbock, TX 79409, USA.
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27
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Mokhov VM, Popov YV. Colloid and nanodimensional catalysts in organic synthesis: VIII. Hydrogenation of C=N bond with hydrogen in the presence of colloid nickel. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s1070363214100090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Huang B, Lei C, Wei C, Zeng G. Chlorinated volatile organic compounds (Cl-VOCs) in environment - sources, potential human health impacts, and current remediation technologies. ENVIRONMENT INTERNATIONAL 2014; 71:118-38. [PMID: 25016450 DOI: 10.1016/j.envint.2014.06.013] [Citation(s) in RCA: 334] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 06/20/2014] [Accepted: 06/24/2014] [Indexed: 05/03/2023]
Abstract
Chlorinated volatile organic compounds (Cl-VOCs), including polychloromethanes, polychloroethanes and polychloroethylenes, are widely used as solvents, degreasing agents and a variety of commercial products. These compounds belong to a group of ubiquitous contaminants that can be found in contaminated soil, air and any kind of fluvial mediums such as groundwater, rivers and lakes. This review presents a summary of the research concerning the production levels and sources of Cl-VOCs, their potential impacts on human health as well as state-of-the-art remediation technologies. Important sources of Cl-VOCs principally include the emissions from industrial processes, the consumption of Cl-VOC-containing products, the disinfection process, as well as improper storage and disposal methods. Human exposure to Cl-VOCs can occur through different routes, including ingestion, inhalation and dermal contact. The toxicological impacts of these compounds have been carefully assessed, and the results demonstrate the potential associations of cancer incidence with exposure to Cl-VOCs. Most Cl-VOCs thus have been listed as priority pollutants by the Ministry of Environmental Protection (MEP) of China, Environmental Protection Agency of the U.S. (U.S. EPA) and European Commission (EC), and are under close monitor and strict control. Yet, more efforts will be put into the epidemiological studies for the risk of human exposure to Cl-VOCs and the exposure level measurements in contaminated sites in the future. State-of-the-art remediation technologies for Cl-VOCs employ non-destructive methods and destructive methods (e.g. thermal incineration, phytoremediation, biodegradation, advanced oxidation processes (AOPs) and reductive dechlorination), whose advantages, drawbacks and future developments are thoroughly discussed in the later sections.
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Affiliation(s)
- Binbin Huang
- College of Environment Science and Engineering, Hunan University, Changsha 410082, P.R. China
| | - Chao Lei
- School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, P.R. China
| | - Chaohai Wei
- Key Laboratory of Environmental Protection and Eco-Remediation of Guangdong Regular Higher Education Institutions, South China University of Technology, Guangzhou 510006, P.R. China
| | - Guangming Zeng
- College of Environment Science and Engineering, Hunan University, Changsha 410082, P.R. China
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Wei J, Qian Y, Liu W, Wang L, Ge Y, Zhang J, Yu J, Ma X. Effects of particle composition and environmental parameters on catalytic hydrodechlorination of trichloroethylene by nanoscale bimetallic Ni-Fe. J Environ Sci (China) 2014; 26:1162-1170. [PMID: 25079647 DOI: 10.1016/s1001-0742(13)60506-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Revised: 08/19/2013] [Accepted: 09/06/2013] [Indexed: 06/03/2023]
Abstract
Catalytic nickel was successfully incorporated into nanoscale iron to enhance its dechlorination efficiency for trichloroethylene (TCE), one of the most commonly detected chlorinated organic compounds in groundwater. Ethane was the predominant product. The greatest dechlorination efficiency was achieved at 22 molar percent of nickel. This nanoscale Ni-Fe is poorly ordered and inhomogeneous; iron dissolution occurred whereas nickel was relatively stable during the 24-hr reaction. The morphological characterization provided significant new insights on the mechanism of catalytic hydrodechlorination by bimetallic nanoparticles. TCE degradation and ethane production rates were greatly affected by environmental parameters such as solution pH, temperature and common groundwater ions. Both rate constants decreased and then increased over the pH range of 6.5 to 8.0, with the minimum value occurring at pH 7.5. TCE degradation rate constant showed an increasing trend over the temperature range of 10 to 25°C. However, ethane production rate constant increased and then decreased over the range, with the maximum value occurring at 20°C. Most salts in the solution appeared to enhance the reaction in the first half hour but overall they displayed an inhibitory effect. Combined ions showed a similar effect as individual salts.
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Affiliation(s)
- Jianjun Wei
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Yajing Qian
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wenjuan Liu
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Lutao Wang
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yijie Ge
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jianghao Zhang
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jiang Yu
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xingmao Ma
- Department of Civil and Environmental Engineering, Southern Illinois University Carbondale, Carbondale, IL 62901, United States.
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30
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Kim EJ, Kim JH, Chang YS, Turcio-Ortega D, Tratnyek PG. Effects of metal ions on the reactivity and corrosion electrochemistry of Fe/FeS nanoparticles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:4002-4011. [PMID: 24579799 DOI: 10.1021/es405622d] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nano-zerovalent iron (nZVI) formed under sulfidic conditions results in a biphasic material (Fe/FeS) that reduces trichloroethene (TCE) more rapidly than nZVI associated only with iron oxides (Fe/FeO). Exposing Fe/FeS to dissolved metals (Pd(2+), Cu(2+), Ni(2+), Co(2+), and Mn(2+)) results in their sequestration by coprecipitation as dopants into FeS and FeO and/or by electroless precipitation as zerovalent metals that are hydrogenation catalysts. Using TCE reduction rates to probe the effect of metal amendments on the reactivity of Fe/FeS, it was found that Mn(2+) and Cu(2+) decreased TCE reduction rates, while Pd(2+), Co(2+), and Ni(2+) increased them. Electrochemical characterization of metal-amended Fe/FeS showed that aging caused passivation by growth of FeO and FeS phases and poisoning of catalytic metal deposits by sulfide. Correlation of rate constants for TCE reduction (kobs) with electrochemical parameters (corrosion potentials and currents, Tafel slopes, and polarization resistance) and descriptors of hydrogen activation by metals (exchange current density for hydrogen reduction and enthalpy of solution into metals) showed the controlling process changed with aging. For fresh Fe/FeS, kobs was best described by the exchange current density for activation of hydrogen, whereas kobs for aged Fe/FeS correlated with electrochemical descriptors of electron transfer.
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Affiliation(s)
- Eun-Ju Kim
- School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, 790-784, Republic of Korea
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Li HJ, Qiu H, Zhang LY, Liu N, Zhu BL. Trichloroethylene dechlorination by copper-contained zero-valent iron slurry. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-3165-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Gui M, Ormsbee LE, Bhattacharyya D. Reactive Functionalized Membranes for Polychlorinated Biphenyl Degradation. Ind Eng Chem Res 2013; 52:10430-10440. [PMID: 24954974 PMCID: PMC4061716 DOI: 10.1021/ie400507c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Membranes have been widely used in water remediation (e.g. desalination and heavy metal removal) because of the ability to control membrane pore size and surface charge. The incorporation of nanomaterials into the membranes provides added benefits through increased reactivity with different functionality. In this study, we report the dechlorination of 2-chlorobiphenyl in the aqueous phase by a reactive membrane system. Fe/Pd bimetallic nanoparticles (NPs) were synthesized (in-situ) within polyacrylic acid (PAA) functionalized polyvinylidene fluoride (PVDF) membranes for degradation of polychlorinated biphenyls (PCBs). Biphenyl formed in the reduction was further oxidized into hydroxylated biphenyls and benzoic acid by an iron-catalyzed hydroxyl radical (OH•) reaction. The formation of magnetite on Fe surface was observed. This combined pathway (reductive/oxidative) could reduce the toxicity of PCBs effectively while eliminating the formation of chlorinated degradation byproducts. The successful manufacturing of full-scale functionalized membranes demonstrates the possibility of applying reactive membranes in practical water treatment.
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Affiliation(s)
- Minghui Gui
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506
| | - Lindell E. Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, KY 40506
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506
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Nie X, Liu J, Yue D, Zeng X, Nie Y. Dechlorination of hexachlorobenzene using lead-iron bimetallic particles. CHEMOSPHERE 2013; 90:2403-2407. [PMID: 23273328 DOI: 10.1016/j.chemosphere.2012.10.068] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 10/01/2012] [Accepted: 10/17/2012] [Indexed: 06/01/2023]
Abstract
Synthesized lead-iron (Pb/Fe) bimetallic particles were applied to dechlorinate hexachlorobenzene (HCB) under various conditions (e.g. bimetal amount, initial pH value, reaction temperature, and reaction duration). The results showed that adding Pb onto Fe benefited the dechlorination of HCB and the bimetal with 1.4% Pb content performed best. The degradation rate decreased regularly as the initial pH value of the aqueous increased from 1.9 to 11.1 except for pH 7.0 where the fastest dechlorination rate emerged. The dechlorination could be enhanced by increasing the amount of Pb/Fe or the reaction temperature. The dechlorination ratio of HCB within 15 min increased from 24.3% to 81.3% when Pb/Fe amount increased from 0.1g to 0.8 g. The dechlorination followed pseudo-first-order kinetics, and the dechlorination rate constants were 0.0027, 0.0064, 0.0157, and 0.0321 min(-1) at 25, 50, 70, and 85 °C, respectively, and the activation energy (E(a)) of the dechlorination by Pb/Fe was 37.86 kJ mol(-1).
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Affiliation(s)
- Xiaoqin Nie
- Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, School of Environment, Tsinghua University, Beijing 100084, PR China.
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Nie X, Liu J, Zeng X, Yue D. Rapid degradation of hexachlorobenzene by micron Ag/Fe bimetal particles. J Environ Sci (China) 2013; 25:473-478. [PMID: 23923419 DOI: 10.1016/s1001-0742(12)60088-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The feasibility of the rapid degradation of hexachlorobenzene (HCB) by micron-size silver (Ag)/iron (Fe) particles was investigated. Ag/Fe particles with different ratios (0, 0.05%, 0.09%, 0.20%, and 0.45%) were prepared by electroless silver plating on 300 mesh Fe powder, and were used to degrade HCB at different pH values and temperatures. The dechlorination ability of Fe greatly increased with small Ag addition, whereas too much added Ag would cover the Fe surface and reduce the effective reaction surface, thereby decreasing the extent of dechlorination. The optimal Ag/Fe ratio was 0.09%. Tafel polarization curves showed that HCB was rapidly degraded at neutral or acidic pH, whereas low pH levels severely intensified H2 production, which consumed the reducing electrons needed for the HCB degradation. HCB degradation was more sensitive to temperature than pH. The rate constant of HCB dechlorination was 0.452 min- at 85 degrees C, 50 times higher than that at 31 degrees C. HCB was degraded in a successive dechlorination pathway, yielding the main products 1,2,4,5-tetrachlorobenzene and 1,2,4-trichlorobenzene within 2 hr.
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Affiliation(s)
- Xiaoqin Nie
- School of Environment, Tsinghua University, Key Laboratory for Solid Waste Management and Environment Safety, Ministry of education of China, Beijing 100084, China.
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Noubactep C. Comment on "Reductive dechlorination of γ-hexachloro-cyclohexane using Fe-Pd bimetallic nanoparticles" by Nagpal et al. [J. Hazard. Mater. 175 (2010) 680-687]. JOURNAL OF HAZARDOUS MATERIALS 2012; 235-236:388-393. [PMID: 21550719 DOI: 10.1016/j.jhazmat.2011.03.081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 03/17/2011] [Accepted: 03/22/2011] [Indexed: 05/30/2023]
Abstract
The author used a recent article on lindane (γ-hexachloro-cyclohexane) reductive dechlorination by Fe/Pd bimetallics to point out that many other of published works in several journals do not conform to the state-of-the-art knowledge on the mechanism of aqueous contaminant removal by metallic iron (e.g. in Fe(0)/H(2)O systems). It is the author's view that the contribution of adsorbed Fe(II) to the process of contaminant reduction has been neglected while discussing the entire process of contaminant reduction in the presence of bimetallics.
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Nakhjavan B, Tahir MN, Natalio F, Panthöfer M, Gao H, Dietzsch M, Andre R, Gasi T, Ksenofontov V, Branscheid R, Kolb U, Tremel W. Ni@Fe₂O₃ heterodimers: controlled synthesis and magnetically recyclable catalytic application for dehalogenation reactions. NANOSCALE 2012; 4:4571-4577. [PMID: 22706341 DOI: 10.1039/c2nr12121b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Ni@Fe(2)O(3) heterodimer nanoparticles (NPs) were synthesized by thermal decomposition of organometallic reactants. After functionalization, these Ni@Fe(2)O(3) heterodimers became water soluble. The pristine heterodimeric NPs were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Mössbauer spectroscopy and magnetic susceptibility measurements. A special advantage of the heterodimers lies in the fact that nanodomains of different composition can be used as catalysts for the removal of environmentally hazardous halogenated pollutants.
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Affiliation(s)
- Bahar Nakhjavan
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55099 Mainz, Germany
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Xiao L, Isner AB, Hilt JZ, Bhattacharyya D. Temperature Responsive Hydrogel with Reactive Nanoparticles. J Appl Polym Sci 2012; 128:1804-1814. [PMID: 30518988 DOI: 10.1002/app.38335] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The application of temperature responsive hydrogels with ion-exchange domain for nanoscale catalytic reactions is an emerging and attractive area because of the combination of individual unique features: temperature responsive tunability by the polymer domain and the high catalytic reactivity of the nanomaterial. Here, we report the entrapment and/or direct synthesis of reactive Fe and Fe/Pd nanoparticles (about 40-70 nm) in a temperature responsive hydrogel network (N-isopropylacrylamide (NIPAAm), and NIPAAm-PAA). These nanoparticles are stabilized in the hydrogel network and the dechlorination (using trichloroethylene, TCE, as a model compound) reactivity in water is enhanced and controllable in the temperature range of 30-34°C involving polymer domain transitions at lower critical solution temperature (LCST) from hydrophilic to collapsed hydrophobic state. Water fraction modulation of the network and the enhancement of pollutant partitioning by the thermally responsive polymers play an important role in the catalytic activity.
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Affiliation(s)
- Li Xiao
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Austin B Isner
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - J Zach Hilt
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046
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Gui M, Smuleac V, Ormsbee LE, Sedlak DL, Bhattacharyya D. Iron oxide nanoparticle synthesis in aqueous and membrane systems for oxidative degradation of trichloroethylene from water. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2012; 14:861. [PMID: 31130817 PMCID: PMC6532989 DOI: 10.1007/s11051-012-0861-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The potential for using hydroxyl radical (OH•) reactions catalyzed by iron oxide nanoparticles (NPs) to remediate toxic organic compounds was investigated. Iron oxide NPs were synthesized by controlled oxidation of iron NPs prior to their use for contaminant oxidation (by H2O2 addition) at near-neutral pH values. Cross-linked polyacrylic acid (PAA) functionalized polyvinylidene fluoride (PVDF) microfiltration membranes were prepared by in situ polymerization of acrylic acid inside the membrane pores. Iron and iron oxide NPs (80-100 nm) were directly synthesized in the polymer matrix of PAA/PVDF membranes, which prevented the agglomeration of particles and controlled the particle size. The conversion of iron to iron oxide in aqueous solution with air oxidation was studied based on X-ray diffraction, Mössbauer spectroscopy and BET surface area test methods. Trichloroethylene (TCE) was selected as the model contaminant because of its environmental importance. Degradations of TCE and H2O2 by NP surface generated OH• were investigated. Depending on the ratio of iron and H2O2, TCE conversions as high as 100 % (with about 91 % dechlorination) were obtained. TCE dechlorination was also achieved in real groundwater samples with the reactive membranes.
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Affiliation(s)
- Minghui Gui
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Vasile Smuleac
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - Lindell E Ormsbee
- Department of Civil Engineering, University of Kentucky, Lexington, KY 40506, USA
| | - David L Sedlak
- Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, CA 94720, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA
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Parshetti GK, Doong RA. Dechlorination of chlorinated hydrocarbons by bimetallic Ni/Fe immobilized on polyethylene glycol-grafted microfiltration membranes under anoxic conditions. CHEMOSPHERE 2012; 86:392-399. [PMID: 22115467 DOI: 10.1016/j.chemosphere.2011.10.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 10/18/2011] [Accepted: 10/19/2011] [Indexed: 05/31/2023]
Abstract
In this study, the dechlorination of chlorinated hydrocarbons including trichloroethylene (TCE), tetrachloroethylene (PCE) and carbon tetrachloride (CT) by bimetallic Ni/Fe nanoparticles immobilized on four different membranes was investigated under anoxic conditions. Effects of several parameters including the nature of membrane, initial concentration, pH value, and reaction temperature on the dechlorination efficiency were examined. The scanning electron microscopic images showed that the Ni/Fe nanoparticles were successfully immobilized inside the four membranes using polyethylene glycol as the cross-linker. The agglomeration of Ni/Fe were observed in poly(vinylidene fluoride), Millex GS and mixed cellulose ester membranes, while a relatively uniform distribution of Ni/Fe was found in nylon-66 membrane because of its hydrophilic nature. The immobilized Ni/Fe nanoparticles exhibited good reactivity towards the dechlorination of chlorinated hydrocarbons, and the pseudo-first-order rate constant for TCE dechlorination by Ni/Fe in nylon-66 were 3.7-11.7 times higher than those in other membranes. In addition, the dechlorination efficiency of chlorinated hydrocarbons followed the order TCE>PCE>CT. Ethane was the only end product for TCE and PCE dechlorination, while dichloromethane and methane were found to be the major products for CT dechlorination, clearly indicating the involvement of reactive hydrogen species in dechlorination. In addition, the initial rate constant for TCE dechlorination increased upon increasing initial TCE concentrations and the activation energy for TCE dechlorination by immobilized Ni/Fe was 34.9 kJ mol(-1), showing that the dechlorination of TCE by membrane-supported Ni/Fe nanoparticles is a surface-mediated reaction.
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Affiliation(s)
- Ganesh K Parshetti
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu 30013, Taiwan
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Smuleac V, Varma R, Sikdar S, Bhattacharyya D. Green Synthesis of Fe and Fe/Pd Bimetallic Nanoparticles in Membranes for Reductive Degradation of Chlorinated Organics. J Memb Sci 2011; 379:131-137. [PMID: 22228920 PMCID: PMC3252031 DOI: 10.1016/j.memsci.2011.05.054] [Citation(s) in RCA: 164] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Membranes containing reactive nanoparticles (Fe and Fe/Pd) immobilized in a polymer film (polyacrylic acid, PAA-coated polyvinylidene fluoride, PVDF membrane) are prepared by a new method. In the present work a biodegradable, non-toxic -"green" reducing agent, green tea extract was used for nanoparticle (NP) synthesis, instead of the well-known sodium borohydride. Green tea extract contains a number of polyphenols that can act as both chelating/reducing and capping agents for the nanoparticles. Therefore, the particles are protected from oxidation and aggregation, which increases their stability and longevity. The membrane supported NPs were successfully used for the degradation of a common and highly important pollutant, trichloroethylene (TCE). The rate of TCE degradation was found to increase linearly with the amount of Fe immobilized on the membrane, the surface normalized rate constant (k(SA)) being 0.005 L/m(2)h. The addition of a second catalytic metal, Pd, to form bimetallic Fe/Pd increased the k(SA) value to 0.008 L/m(2)h. For comparison purposes, Fe and Fe/Pd nanoparticles were synthesized in membranes using sodium borohydride as a reducing agent. Although the initial k(SA) values for this case (for Fe) are one order of magnitude higher than the tea extract synthesized NPs, the rapid oxidation reduced their reactivity to less than 20 % within 4 cycles. For the green tea extract NPs, the initial reactivity in the membrane domain was preserved even after 3 months of repeated use. The reactivity of TCE was verified with "real" water system.
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Affiliation(s)
- V. Smuleac
- Dept. of Chemical and Materials Engineering, University of Kentucky Lexington, KY 40506 USA
| | - R. Varma
- Sustainable Technology Division, National Risk Management Research Lab/USEPA Cincinnati, OH 45268 USA
| | - S. Sikdar
- Sustainable Technology Division, National Risk Management Research Lab/USEPA Cincinnati, OH 45268 USA
| | - D. Bhattacharyya
- Dept. of Chemical and Materials Engineering, University of Kentucky Lexington, KY 40506 USA
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42
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Parshetti GK, Doong RA. Synergistic effect of nickel ions on the coupled dechlorination of trichloroethylene and 2,4-dichlorophenol by Fe/TiO₂ nanocomposites in the presence of UV light under anoxic conditions. WATER RESEARCH 2011; 45:4198-4210. [PMID: 21683974 DOI: 10.1016/j.watres.2011.05.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2010] [Revised: 05/12/2011] [Accepted: 05/22/2011] [Indexed: 05/30/2023]
Abstract
The coupled removal of priority pollutants by nanocomposite materials has recently been receiving much attention. In this study, trichloroethylene (TCE) and 2,4-dichlorophenol (DCP) in aqueous solutions were simultaneously removed by Fe/TiO₂ nanocomposites under anoxic conditions in the presence of nickel ions and UV light at 365 nm. Both TCE and DCP were effectively dechlorinated by Fe/TiO₂ nanocomposites, and the pseudo-first-order rate constants (k(obs)) for TCE and DCP dechlorination were (1.39 ± 0.05)×10⁻² and (1.08 ± 0.05)×10⁻² h⁻¹, respectively, which were higher than that by nanoscale zerovalent iron alone. In addition, the k(obs) for DCP dechlorination was enhanced by a factor of 77 when Fe/TiO₂ was illuminated with UV light for 2 h. Hydrodechlorination was found to be the major reaction pathway for TCE dechlorination, while DCP could undergo reductive dechlorination or react with hydroxyl radicals to produce 1,4-benzoquinone and phenol. TCE was a stronger electron acceptor than DCP, which could inhibit the dechlorination efficiency and rate of DCP during simultaneous removal processes. The addition of nickel ions significantly enhanced the simultaneous photodechlorination efficiency of TCE and DCP under the illumination of UV light. The k(obs) values for DCP and TCE photodechlorination by Fe/TiO₂ in the presence of 20-100 μM Ni(II) were 30.4-136 and 13.2-192 times greater, respectively, when compared with those in the dark. Electron spin resonance analysis showed that the photo-generated electron-hole pairs could be effectively separated through Ni ions cycling, leading to the improvement of electron transfer efficiency of TCE and DCP by Fe/TiO₂.
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Affiliation(s)
- Ganesh K Parshetti
- Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
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Zahran EM, Bhattacharyya D, Bachas LG. Development of reactive Pd/Fe bimetallic nanotubes for dechlorination reactions. JOURNAL OF MATERIALS CHEMISTRY 2011; 21:10454-10462. [PMID: 30505074 PMCID: PMC6262226 DOI: 10.1039/c1jm11435b] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We described the synthesis and characterization of a new class of bimetallic nanotubes based on Pd/Fe and demonstrated their efficacy in the dechlorination of PCB 77, a polychlorinated biphenyl. Onedimensional iron metal nanotubes of different diameters were prepared by electroless deposition within the pores of PVP-coated polycarbonate membranes using a simple technique under ambient conditions. The longitudinal nucleation of the nanotubes along the pore walls was achieved by mounting the PC membrane between two halves of a U-shape reaction tube. The composition, morphology, and structure of the Pd/Fe nanotubes were characterized by transmission electron microscopy, scanning electron microscopy, inductively coupled plasma-atomic emission spectroscopy, and X-ray powder diffraction spectroscopy. The as-prepared Pd/Fe bimetallic nanotubes were used in dechlorination of 3,3',4,4'-tetrachlorobiphenyl (PCB 77). In comparison with Pd/Fe nanoparticles, the Pd/Fe nanotubes demonstrated higher efficiency and faster dechlorination of the PCB.
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Affiliation(s)
- Elsayed M Zahran
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Dibakar Bhattacharyya
- Department of Chemical and Material Engineering, University of Kentucky, Lexington, KY, 40506, USA
| | - Leonidas G Bachas
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
- Department of Chemistry, University of Miami, Coral Gables, FL, 33146, USA. ; ; Tel: +1 859 257-6350
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44
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Berge ND, Ramsburg CA. Iron-mediated trichloroethene reduction within nonaqueous phase liquid. JOURNAL OF CONTAMINANT HYDROLOGY 2010; 118:105-16. [PMID: 20708817 DOI: 10.1016/j.jconhyd.2010.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Revised: 06/21/2010] [Accepted: 07/15/2010] [Indexed: 05/11/2023]
Abstract
Aqueous slurries or suspensions containing reactive iron nanoparticles are increasingly suggested as a potential means for remediating chlorinated solvent nonaqueous phase liquid (NAPL) source zones. Aqueous-based treatment approaches, however, may be limited by contaminant dissolution from the NAPL and the subsequent contaminant transport to the reactive nanoparticles. Reactions occurring within (or at the interface) of the NAPL may alleviate these potential limitations, but this approach has received scant attention due to concerns associated with the reactivity of iron within nonaqueous phases. Results presented herein suggest that iron nanoparticles are reactive with TCE-NAPL and exhibit dechlorination rates proportional to the concentration of (soluble) water present within the NAPL. Reactivity was assessed over a 12-day period for five water contents ranging from 0.31 M to 4.3M, with n-butanol used to enhance water solubility in the NAPL. Rates of dechlorination were generally slower than those reported for aqueous-phase dechlorination, but were not observed to slow over the course of the 12-day period. The lack of observed deactivation may indicate the potential that highly efficient (with respect to utilization of available electrons) dechlorination reactions can be engineered to occur within nonaqueous liquids. These results suggest a need for subsequent investigations which focus on understanding the mechanisms of the reactions occurring within NAPL, as well as those assessing the utility of controlling both the iron and water content within a NAPL source zone.
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Affiliation(s)
- Nicole D Berge
- Department of Civil and Environmental Engineering, University of South Carolina, 300 Main Street, Columbia, South Carolina 29208, USA.
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Ghauch A, Abou Assi H, Bdeir S. Aqueous removal of diclofenac by plated elemental iron: bimetallic systems. JOURNAL OF HAZARDOUS MATERIALS 2010; 182:64-74. [PMID: 20580154 DOI: 10.1016/j.jhazmat.2010.05.139] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 05/21/2010] [Accepted: 05/28/2010] [Indexed: 05/22/2023]
Abstract
The aqueous removal of diclofenac (DF) by micrometric iron particles (Fe(0)) and amended Fe(0) (Me(0)(Fe(0))) under oxic and anoxic conditions was investigated. Bimetallic systems were obtained by plating the surface of Fe with Co, Cu, Ir, Ni, Pd and Sn. Experimental results confirmed the superiority of (Me(0)(Fe(0))) for DF removal except for IrFe (oxic) and SnFe (anoxic). Under anoxic conditions, Pd was by far the most efficient plating element followed by Ir, Ni, Cu, Co and Sn. However, under oxic conditions, Pd and Cu showed almost the same efficiency in removing DF followed by Ni, Co, Sn and Ir. Oxidative and reductive DF transformation products were identified under oxic and anoxic conditions respectively. In some systems (e.g. CoFe and SnFe oxic/anoxic; PdFe oxic; NiFe anoxic), no transformation products could be detected. This was ascribed to the nature of the plating element and its impact on the process of the formation of metal corrosion products (MCPs). MCPs are known for their high potential to strongly adsorb, bond, sequestrate and enmesh both the original contaminant and its reaction products. Obtained results corroborate the universal validity of the view, that aqueous contaminants are basically removed by adsorption and co-precipitation.
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Affiliation(s)
- Antoine Ghauch
- American University of Beirut, Faculty of Arts and Sciences, Department of Chemistry, P.O. Box 11-0236, Riad El Solh, 1107-2020 Beirut, Lebanon.
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Wang S, Yang B, Zhang T, Yu G, Deng S, Huang J. Catalytic Hydrodechlorination of 4-Chlorophenol in an Aqueous Solution with Pd/Ni Catalyst and Formic Acid. Ind Eng Chem Res 2010. [DOI: 10.1021/ie9005194] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shu Wang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Bo Yang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Tingting Zhang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Gang Yu
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Shubo Deng
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jun Huang
- Department of Environmental Science and Engineering, POPs Research Center, Tsinghua University, Beijing 100084, China, and Department of Environmental Science and Engineering, College of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China
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Nagpal V, Bokare AD, Chikate RC, Rode CV, Paknikar KM. Reductive dechlorination of gamma-hexachlorocyclohexane using Fe-Pd bimetallic nanoparticles. JOURNAL OF HAZARDOUS MATERIALS 2010; 175:680-687. [PMID: 19944524 DOI: 10.1016/j.jhazmat.2009.10.063] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Revised: 09/15/2009] [Accepted: 10/15/2009] [Indexed: 05/28/2023]
Abstract
Nanoscale Fe-Pd bimetallic particles were synthesized and used for degradation of lindane (gamma-hexachlorocyclohexane) in aqueous solution. Batch studies showed that 5mg/L of lindane was completely dechlorinated within 5 min at a catalyst loading of 0.5 g/L and the degradation process followed first-order kinetics. GC-MS analysis in corroboration with GC-ECD results showed the presence of cyclohexane as the final degradation product. The proposed mechanism for the reductive dechlorination of lindane involves Fe corrosion-induced hydrogen atom transfer from the Pd surface. The enhanced degradation efficiency of Fe-Pd nanoparticles is attributed to: (1) high specific surface area of the nanoscale metal particles (60 m(2)/g), manyfold greater that of commercial grade micro- or milli-scale iron particles (approximately 1.6m(2)/g); and, (2) increased catalytic reactivity due to the presence of Pd on the surface. Recycling and column studies showed that these nanoparticles exhibit efficient and sustained catalytic activity.
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Affiliation(s)
- Varima Nagpal
- Center for Nanobioscience, Agharkar Research Institute, G.G. Agarkar Road, Pune 411004, Maharashtra, India
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Smuleac V, Bachas L, Bhattacharyya D. Aqueous - Phase Synthesis of PAA in PVDF Membrane Pores for Nanoparticle Synthesis and Dichlorobiphenyl Degradation. J Memb Sci 2010; 346:310-317. [PMID: 20161475 PMCID: PMC2794051 DOI: 10.1016/j.memsci.2009.09.052] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This paper deals with bimetallic (Fe/Pd) nanoparticle synthesis inside the membrane pores and application for catalytic dechlorination of toxic organic compounds form aqueous streams. Membranes have been used as platforms for nanoparticle synthesis in order to reduce the agglomeration, encountered in solution phase synthesis which leads to a dramatic loss of reactivity. The membrane support, polyvinylidene fluoride (PVDF) was modified by in situ polymerization of acrylic acid in aqueous phase. Subsequent steps included ion exchange with Fe(2+), reduction to Fe(0) with sodium borohydride and Pd deposition. Various techniques, such as STEM, EDX, FTIR and permeability measurements, were used for membrane characterization and showed that bimetallic (Fe/Pd) nanoparticles with an average size of 20-30 nm have been incorporated inside of the PAA-coated membrane pores. The Fe/Pd-modified membranes showed a high reactivity toward a model compound, 2, 2'-dichlorobyphenyl and a strong dependence of degradation on Pd (hydrogenation catalyst) content. The use of convective flow substantially reduces the degradation time: 43% conversion of dichlorobiphenyl to biphenyl can be achieved in less than 40 s residence time. Another important aspect is the ability to regenerate and reuse the Fe/Pd bimetallic systems by washing with a solution of sodium borohydride, because the iron becomes inactivated (corroded) as the dechlorination reaction proceeds.
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Affiliation(s)
- V. Smuleac
- Department of Chemical and Materials Engineering University of Kentucky, Lexington, KY 40506
| | - L. Bachas
- Department of Chemistry University of Kentucky, Lexington, KY 40506
| | - D. Bhattacharyya
- Department of Chemical and Materials Engineering University of Kentucky, Lexington, KY 40506
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