Enhanced vacuum UV-based process (VUV/H2O2/PMS) for the effective removal of ammonia from water : Engineering configuration and mechanistic considerations
Copyright © 2020 Elsevier B.V. All rights reserved..
In this work, the VUV, VUV/H2O2, VUV/PMS, and VUV/H2O2/PMS processes were compared with the corresponding UVC-based AOPs under identical experimental conditions for the ammonia removal. Among the examined AOPs, the VUV/H2O2/PMS demonstrated the highest performance in converting NH4+ to N2. A 82.7 % removal of 100 mg/L NH4+, with N2 selectivity over 99 % was obtained in the VUV/H2O2/PMS process within 60 min, operated under near neutral pH. Under these operation conditions, [NO3-] was around 0.5 mg-N/L with [NO2-] remaining below detection. The VUV-mediated generation of SO4•-and HO• with NH4+ had a relative contribution of 37.9 and 62.1 %, respectively. The VUV/H2O2/PMS process operated under a flow-through mode achieved efficient removal of 100 mg/L NH4+ (80.5 %) in a hydraulic retention time (HRT) of 40 min. The continuous-flow VUV/H2O2/PMS process efficiently treated a real ammonia-laden groundwater and the concentration of NH4+ decreased from 30 mg/L to around 1 mg/L within 60 min HRT. In summary, the VUV/H2O2/PMS process was effective from the technical and energetical point of view, hence is a viable and promising technique for treating effluent containing high concentrations of ammonia.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:402 |
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| Enthalten in: |
Journal of hazardous materials - 402(2021) vom: 15. Jan., Seite 123789 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Amanollahi, Hawzhin [VerfasserIn] |
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| Links: |
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| Themen: |
Advanced Oxidation Processes (AOPs) |
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| Anmerkungen: |
Date Completed 19.02.2021 Date Revised 19.02.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1016/j.jhazmat.2020.123789 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM318211629 |
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| 100 | 1 | |a Amanollahi, Hawzhin |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Enhanced vacuum UV-based process (VUV/H2O2/PMS) for the effective removal of ammonia from water |b Engineering configuration and mechanistic considerations |
| 264 | 1 | |c 2021 | |
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| 500 | |a Date Completed 19.02.2021 | ||
| 500 | |a Date Revised 19.02.2021 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright © 2020 Elsevier B.V. All rights reserved. | ||
| 520 | |a In this work, the VUV, VUV/H2O2, VUV/PMS, and VUV/H2O2/PMS processes were compared with the corresponding UVC-based AOPs under identical experimental conditions for the ammonia removal. Among the examined AOPs, the VUV/H2O2/PMS demonstrated the highest performance in converting NH4+ to N2. A 82.7 % removal of 100 mg/L NH4+, with N2 selectivity over 99 % was obtained in the VUV/H2O2/PMS process within 60 min, operated under near neutral pH. Under these operation conditions, [NO3-] was around 0.5 mg-N/L with [NO2-] remaining below detection. The VUV-mediated generation of SO4•-and HO• with NH4+ had a relative contribution of 37.9 and 62.1 %, respectively. The VUV/H2O2/PMS process operated under a flow-through mode achieved efficient removal of 100 mg/L NH4+ (80.5 %) in a hydraulic retention time (HRT) of 40 min. The continuous-flow VUV/H2O2/PMS process efficiently treated a real ammonia-laden groundwater and the concentration of NH4+ decreased from 30 mg/L to around 1 mg/L within 60 min HRT. In summary, the VUV/H2O2/PMS process was effective from the technical and energetical point of view, hence is a viable and promising technique for treating effluent containing high concentrations of ammonia | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a Advanced Oxidation Processes (AOPs) | |
| 650 | 4 | |a Ammonia nitrogen | |
| 650 | 4 | |a Hydroxyl radical | |
| 650 | 4 | |a Sulfate radical | |
| 650 | 4 | |a VUV | |
| 700 | 1 | |a Moussavi, Gholamreza |e verfasserin |4 aut | |
| 700 | 1 | |a Giannakis, Stefanos |e verfasserin |4 aut | |
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| 773 | 1 | 8 | |g volume:402 |g year:2021 |g day:15 |g month:01 |g pages:123789 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1016/j.jhazmat.2020.123789 |3 Volltext |
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