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Anit J, Praveena M, Thoufeeq S, Al-omari I, Anantharaman M. A simple polyol one-shot synthesis of Maghemite and Hematite from inexpensive precursors. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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Mokkarat A, Kruanetr S, Sakee U. One-step continuous flow synthesis of aminopropyl silica-coated magnetite nanoparticles. Journal of Saudi Chemical Society 2022. [DOI: 10.1016/j.jscs.2022.101506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Diephuis WR, Molloy AL, Boltz LL, Porter TB, Aragon Orozco A, Duron R, Crespo D, George LJ, Reiffer AD, Escalera G, Bohloul A, Avendano C, Colvin VL, Gonzalez-Pech NI. The Effect of Agglomeration on Arsenic Adsorption Using Iron Oxide Nanoparticles. Nanomaterials (Basel) 2022; 12:1598. [PMID: 35564307 DOI: 10.3390/nano12091598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/03/2022] [Accepted: 05/05/2022] [Indexed: 01/22/2023]
Abstract
The presence of arsenic in groundwater and other drinking water sources presents a notable public health concern. Although the utilization of iron oxide nanomaterials as arsenic adsorbents has shown promising results in batch experiments, few have succeeded in using nanomaterials in filter setups. In this study, the performance of nanomaterials, supported on sand, was first compared for arsenic adsorption by conducting continuous flow experiments. Iron oxide nanoparticles (IONPs) were prepared with different synthetic methodologies to control the degree of agglomeration. IONPs were prepared by thermal decomposition or coprecipitation and compared with commercially available IONPs. Electron microscopy was used to characterize the degree of agglomeration of the pristine materials after deposition onto the sand. The column experiments showed that IONPs that presented less agglomeration and were well dispersed over the sand had a tendency to be released during water treatment. To overcome this implementation challenge, we proposed the use of clusters of iron oxide nanoparticles (cIONPs), synthesized by a solvothermal methodology, which was explored. An isotherm experiment was also conducted to determine the arsenic adsorption capacities of the iron oxide nanomaterials. cIONPs showed higher adsorption capacities (121.4 mg/g) than the other IONPs (11.1, 6.6, and 0.6 mg/g for thermal decomposition, coprecipitation, and commercially available IONPs, respectively), without the implementation issues presented by IONPs. Our results show that the use of clusters of nanoparticles of other compositions opens up the possibilities for multiple water remediation applications.
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Modrogan C, Cǎprǎrescu S, Dǎncilǎ AM, Orbuleț OD, Grumezescu AM, Purcar V, Radițoiu V, Fierascu RC. Modified Composite Based on Magnetite and Polyvinyl Alcohol: Synthesis, Characterization, and Degradation Studies of the Methyl Orange Dye from Synthetic Wastewater. Polymers (Basel) 2021; 13:polym13223911. [PMID: 34833210 PMCID: PMC8625922 DOI: 10.3390/polym13223911] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/06/2021] [Accepted: 11/10/2021] [Indexed: 11/16/2022] Open
Abstract
The goal of the present paper was to synthesize, characterize, and evaluate the performance of the modified composite based on magnetite (Fe3O4) and polyvinyl alcohol (PVA). The obtained composite was used to degrade Methyl Orange dye from synthetic wastewater by a laboratory photocatalytic reactor. Various parameters of the photodegradation process were tested: composite dosage, amount of hydrogen peroxide (H2O2), and pH. The composite was characterized by Fourier Transform Infrared (FTIR) Spectroscopy, X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). The degradation experiments indicated that the complete dye decolorization depended on the amount of H2O2. In addition, the H2O2 could accelerate Methyl Orange degradation to more highly oxidized intermediates in the presence of UV light (99.35%). The results suggested that the obtained modified composite could be used to treat wastewater containing various types of dyes.
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Affiliation(s)
- Cristina Modrogan
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (C.M.); (A.M.D.); (O.D.O.)
| | - Simona Cǎprǎrescu
- Inorganic Chemistry, Physical Chemistry and Electrochemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania
- Correspondence:
| | - Annette Madelene Dǎncilǎ
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (C.M.); (A.M.D.); (O.D.O.)
| | - Oanamari Daniela Orbuleț
- Department of Analytical Chemistry and Environmental Engineering, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (C.M.); (A.M.D.); (O.D.O.)
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (A.M.G.); (R.C.F.)
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050657 Bucharest, Romania
- Academy of Romanian Scientists, Ilfov No. 3, 50044 Bucharest, Romania
| | - Violeta Purcar
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independentei, No. 202, 060021 Bucharest, Romania; (V.P.); (V.R.)
| | - Valentin Radițoiu
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independentei, No. 202, 060021 Bucharest, Romania; (V.P.); (V.R.)
| | - Radu Claudiu Fierascu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Ghe. Polizu Street No 1-7, 011061 Bucharest, Romania; (A.M.G.); (R.C.F.)
- National Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Splaiul Independentei, No. 202, 060021 Bucharest, Romania; (V.P.); (V.R.)
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