Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foam
Background and Objective: This study aimed to provide an effective electro-catalytic system for the simultaneous reduction of nitrate and disinfection of contaminated water by the electro-catalytic performance of Ni-Fe/Fe3O4 cathode. Materials and Methods: At first, the Ni-Fe electrode was synthesiz...
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| Format: | Article |
| Language: | fas |
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Tehran University of Medical Sciences
2022-08-01
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| Series: | سلامت و محیط |
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| Online Access: | http://ijhe.tums.ac.ir/article-1-6678-en.html |
| _version_ | 1811335765553053696 |
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| author | Zohreh Akbari Jonoush Abbas Rezaee Ali Ghaffarinejad |
| author_facet | Zohreh Akbari Jonoush Abbas Rezaee Ali Ghaffarinejad |
| author_sort | Zohreh Akbari Jonoush |
| collection | DOAJ |
| description | Background and Objective: This study aimed to provide an effective electro-catalytic system for the simultaneous reduction of nitrate and disinfection of contaminated water by the electro-catalytic performance of Ni-Fe/Fe3O4 cathode.
Materials and Methods: At first, the Ni-Fe electrode was synthesized by the electro-deposition process. Then its physical properties were analyzed by scanning electron microscopy (FESEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, and photoelectron X-ray spectroscopy (XPS). Simultaneous disinfection and reduction of nitrate were performed under the following conditions: 15 mg Fe3O4 nanoparticles, pH 6.5, NaCl 10 mM, 50 mg/L nitrate, 105 CFU/mL and current density 4 mA/cm2.
Results: According to the results obtained in the absence of nitrate, 100 % of Escherichia coli bacteria were disinfected after 12 minutes. In the presence of nitrate, the time of complete disinfection increased to 120 minutes. In the absence of bacteria, 83% of nitrate was removed in 240 minutes, and in the presence of bacteria, the nitrate reduction efficiency increased slightly to 88%. In the nitrate reduction process, nitrite (0.22 mg/L) and ammonium (3.6 mg/L) were produced. In the presence of bacteria, the amounts of nitrite and ammonium produced increased to 0.42 mg/L and 7.3 mg/L.
Conclusion: The results show the outstanding ability of Ni-Fe/Fe3O4 electrode in electro-catalytic reduction of nitrate and disinfection of contaminated water separately and simultaneously with high efficiency and high selectivity to nitrogen. |
| first_indexed | 2024-04-13T17:29:04Z |
| format | Article |
| id | doaj.art-be1c61cb4f3f421ea1d3589bc2e57460 |
| institution | Directory Open Access Journal |
| issn | 2008-2029 2008-3718 |
| language | fas |
| last_indexed | 2024-04-13T17:29:04Z |
| publishDate | 2022-08-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | سلامت و محیط |
| spelling | doaj.art-be1c61cb4f3f421ea1d3589bc2e574602022-12-22T02:37:38ZfasTehran University of Medical Sciencesسلامت و محیط2008-20292008-37182022-08-01152331344Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foamZohreh Akbari Jonoush0Abbas Rezaee1Ali Ghaffarinejad2 Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran Electroanalytical Chemistry Research Center, Faculty of Chemistry, Iran University of Science and Technology, Tehran, Iran Background and Objective: This study aimed to provide an effective electro-catalytic system for the simultaneous reduction of nitrate and disinfection of contaminated water by the electro-catalytic performance of Ni-Fe/Fe3O4 cathode. Materials and Methods: At first, the Ni-Fe electrode was synthesized by the electro-deposition process. Then its physical properties were analyzed by scanning electron microscopy (FESEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, and photoelectron X-ray spectroscopy (XPS). Simultaneous disinfection and reduction of nitrate were performed under the following conditions: 15 mg Fe3O4 nanoparticles, pH 6.5, NaCl 10 mM, 50 mg/L nitrate, 105 CFU/mL and current density 4 mA/cm2. Results: According to the results obtained in the absence of nitrate, 100 % of Escherichia coli bacteria were disinfected after 12 minutes. In the presence of nitrate, the time of complete disinfection increased to 120 minutes. In the absence of bacteria, 83% of nitrate was removed in 240 minutes, and in the presence of bacteria, the nitrate reduction efficiency increased slightly to 88%. In the nitrate reduction process, nitrite (0.22 mg/L) and ammonium (3.6 mg/L) were produced. In the presence of bacteria, the amounts of nitrite and ammonium produced increased to 0.42 mg/L and 7.3 mg/L. Conclusion: The results show the outstanding ability of Ni-Fe/Fe3O4 electrode in electro-catalytic reduction of nitrate and disinfection of contaminated water separately and simultaneously with high efficiency and high selectivity to nitrogen.http://ijhe.tums.ac.ir/article-1-6678-en.htmlelectro-catalytic nitrate reductiondisinfectione. colinickel foammagnetic nanoparticles |
| spellingShingle | Zohreh Akbari Jonoush Abbas Rezaee Ali Ghaffarinejad Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foam سلامت و محیط electro-catalytic nitrate reduction disinfection e. coli nickel foam magnetic nanoparticles |
| title | Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foam |
| title_full | Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foam |
| title_fullStr | Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foam |
| title_full_unstemmed | Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foam |
| title_short | Simultaneous removal of nitrate and microbial pollution from water by the electro-catalytic activity of iron and magnetic nanoparticles supported on nickel foam |
| title_sort | simultaneous removal of nitrate and microbial pollution from water by the electro catalytic activity of iron and magnetic nanoparticles supported on nickel foam |
| topic | electro-catalytic nitrate reduction disinfection e. coli nickel foam magnetic nanoparticles |
| url | http://ijhe.tums.ac.ir/article-1-6678-en.html |
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