Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid Polymer
Hybrid adsorbent, based on the cross-linked copolymer impregnated with hydrous iron oxide, was applied for the first time for Se(VI) adsorption from water. The influence of the initial solution pH, selenate concentration and contact time to adsorption capacity was investigated. Adsorbent regeneratio...
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MDPI AG
2020-12-01
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| Series: | Metals |
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| author | Vesna Marjanovic Aleksandra Peric-Grujic Mirjana Ristic Aleksandar Marinkovic Radmila Markovic Antonije Onjia Marija Sljivic-Ivanovic |
| author_facet | Vesna Marjanovic Aleksandra Peric-Grujic Mirjana Ristic Aleksandar Marinkovic Radmila Markovic Antonije Onjia Marija Sljivic-Ivanovic |
| author_sort | Vesna Marjanovic |
| collection | DOAJ |
| description | Hybrid adsorbent, based on the cross-linked copolymer impregnated with hydrous iron oxide, was applied for the first time for Se(VI) adsorption from water. The influence of the initial solution pH, selenate concentration and contact time to adsorption capacity was investigated. Adsorbent regeneration was explored using a full factorial experimental design in order to optimize the volume, initial pH value and concentration of the applied NaCl solution as a reagent. Equilibrium state was described using the Langmuir model, while kinetics fitted the pseudo-first order. The maximum adsorption capacity was found to be 28.8 mg/g. Desorption efficiency increased up to 70%, and became statistically significant with the reagent concentration and pH increase, while the applied solution volume was found to be insignificant in the investigated range. Based on the results obtained, pH influence to the adsorption capacity, desorption efficiency, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis of loaded adsorbent, it was concluded that the outer- and inner-sphere complexation are mechanisms responsible for Se(VI) separation from water. In addition to the experiments with synthetic solutions, the adsorbent performances in drinking water samples were explored, showing the purification efficiency up to 25%, depending on the initial Se(VI) concentration and water pH. Determined sorption capacity of the cross-linked copolymer impregnated with hydrous iron oxide and its ability for regeneration, candidate this material for further research, as a promising anionic species sorbent. |
| first_indexed | 2024-03-10T14:19:22Z |
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| id | doaj.art-5188ac2fccfa4363a71c8b40030a98d8 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T14:19:22Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-5188ac2fccfa4363a71c8b40030a98d82023-11-20T23:30:52ZengMDPI AGMetals2075-47012020-12-011012163010.3390/met10121630Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid PolymerVesna Marjanovic0Aleksandra Peric-Grujic1Mirjana Ristic2Aleksandar Marinkovic3Radmila Markovic4Antonije Onjia5Marija Sljivic-Ivanovic6Mining and Metallurgy Institute Bor, Zeleni bulevar 35, 19210 Bor, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, SerbiaMining and Metallurgy Institute Bor, Zeleni bulevar 35, 19210 Bor, SerbiaFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, SerbiaVinča Institute of Nuclear Sciences, University of Belgrade, 12-14 Mike Petrovića Street, 11351 Belgrade, SerbiaHybrid adsorbent, based on the cross-linked copolymer impregnated with hydrous iron oxide, was applied for the first time for Se(VI) adsorption from water. The influence of the initial solution pH, selenate concentration and contact time to adsorption capacity was investigated. Adsorbent regeneration was explored using a full factorial experimental design in order to optimize the volume, initial pH value and concentration of the applied NaCl solution as a reagent. Equilibrium state was described using the Langmuir model, while kinetics fitted the pseudo-first order. The maximum adsorption capacity was found to be 28.8 mg/g. Desorption efficiency increased up to 70%, and became statistically significant with the reagent concentration and pH increase, while the applied solution volume was found to be insignificant in the investigated range. Based on the results obtained, pH influence to the adsorption capacity, desorption efficiency, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis of loaded adsorbent, it was concluded that the outer- and inner-sphere complexation are mechanisms responsible for Se(VI) separation from water. In addition to the experiments with synthetic solutions, the adsorbent performances in drinking water samples were explored, showing the purification efficiency up to 25%, depending on the initial Se(VI) concentration and water pH. Determined sorption capacity of the cross-linked copolymer impregnated with hydrous iron oxide and its ability for regeneration, candidate this material for further research, as a promising anionic species sorbent.https://www.mdpi.com/2075-4701/10/12/1630macroporous polymergoethitefactorial designdesorption |
| spellingShingle | Vesna Marjanovic Aleksandra Peric-Grujic Mirjana Ristic Aleksandar Marinkovic Radmila Markovic Antonije Onjia Marija Sljivic-Ivanovic Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid Polymer Metals macroporous polymer goethite factorial design desorption |
| title | Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid Polymer |
| title_full | Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid Polymer |
| title_fullStr | Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid Polymer |
| title_full_unstemmed | Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid Polymer |
| title_short | Selenate Adsorption from Water Using the Hydrous Iron Oxide-Impregnated Hybrid Polymer |
| title_sort | selenate adsorption from water using the hydrous iron oxide impregnated hybrid polymer |
| topic | macroporous polymer goethite factorial design desorption |
| url | https://www.mdpi.com/2075-4701/10/12/1630 |
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