Farkas Luca and Kréz Zsófia and Alapi Tünde: Effect of inorganic ions on the vacuum-uv photolysis of water.
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Abstract
Vacuum-ultraviolet (VUV) photolysis is based on high-energy radiation ( < 200 nm) where photons are absorbed by water and produce highly reactive species; primarily HO• and H• , and in smaller quantities eaq . VUV photolysis, due to the radicals formed, can efficiently transform and mineralize organic contaminants without any other additives. In this work, the effect of different inorganic ions (Cl– , NO3 ,HCO3 ), present in large amounts in wastewater, was investigated in the case of two different types of VUV light sources. The conventionally used low-pressure mercury-vapor lamp emits both 254 nm UV and 185 nm VUV photons and is widely used in water treatment for disinfection (254 nm) and producing high purity water (254/185 nm). The other applied light source was the Xe excimer lamp, used mainly in the laboratory scale, emits quasi-monochromatic 172 nm VUV light. The effect of inorganic ions during VUV photolysis depends on the radical scavenging capacity, molar absorbance of ions, and the properties of the radicals and radical ions formed from them by VUV or UV photolysis (for UV/VUV185nm), which is well reflected by the results presented.
| Item Type: | Conference or Workshop Item |
|---|---|
| Journal or Publication Title: | Proceedings of the International Symposium on Analytical and Environmental Problems |
| Date: | 2021 |
| Volume: | 27 |
| ISBN: | 978-963-306-835-9 |
| Page Range: | pp. 119-123 |
| Language: | English |
| Publisher: | University of Szeged |
| Place of Publication: | Szeged |
| Event Title: | International Symposium on Analytical and Environmental Problems (27.) (2021) (Szeged) |
| Related URLs: | http://acta.bibl.u-szeged.hu/75798/ |
| Uncontrolled Keywords: | Szervetlen kémia, Analitikai kémia |
| Additional Information: | Bibliogr.: 123. p. ; ill. ; összefoglalás angol nyelven |
| Subjects: | 01. Natural sciences 01. Natural sciences > 01.04. Chemical sciences |
| Date Deposited: | 2022. May. 30. 10:41 |
| Last Modified: | 2022. Aug. 08. 15:40 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/75940 |
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