Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas
Hydroxyl polycyclic aromatic hydrocarbons (OH-PAHs) are derived from hydroxylated PAHs as contaminants of emerging concern. They are ubiquitous in the aqueous and atmospheric environments and may exist in the polar snow and ice, which urges new insights into their environmental transformation, espec...
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ftulancaster:oai:eprints.lancs.ac.uk:79682 2023-08-27T04:04:42+02:00 Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas Ge, Linke Li, Jun Na, Guangshui Chen, Chang'er Huo, Cheng Zhang, Peng Yao, Ziwei 2016-07-01 https://eprints.lancs.ac.uk/id/eprint/79682/ https://doi.org/10.1016/j.chemosphere.2016.04.087 unknown Ge, Linke and Li, Jun and Na, Guangshui and Chen, Chang'er and Huo, Cheng and Zhang, Peng and Yao, Ziwei (2016) Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas. Chemosphere, 155. pp. 375-379. ISSN 0045-6535 Journal Article PeerReviewed 2016 ftulancaster https://doi.org/10.1016/j.chemosphere.2016.04.087 2023-08-03T22:29:23Z Hydroxyl polycyclic aromatic hydrocarbons (OH-PAHs) are derived from hydroxylated PAHs as contaminants of emerging concern. They are ubiquitous in the aqueous and atmospheric environments and may exist in the polar snow and ice, which urges new insights into their environmental transformation, especially in ice. In present study the simulated-solar (λ > 290 nm) photodegradation kinetics, products and pathways of four OH-PAHs (9-Hydroxyfluorene, 2-Hydroxyfluorene, 1-Hydroxypyrene and 9-Hydroxyphenanthrene) in ice were investigated, and the corresponding implications for the polar areas were explored. It was found that the kinetics followed the pseudo-first-order kinetics with the photolysis quantum yields (Φs) ranging from 7.48 × 10−3 (1-Hydroxypyrene) to 4.16 × 10−2 (2-Hydroxyfluorene). These 4 OH-PAHs were proposed to undergo photoinduced hydroxylation, resulting in multiple hydroxylated intermediates, particularly for 9-Hydroxyfluorene. Extrapolation of the lab data to the real environment is expected to provide a reasonable estimate of OH-PAH photolytic half-lives (t1/2,E) in mid-summer of the polar areas. The estimated t1/2,E values ranged from 0.08 h for 1-OHPyr in the Arctic to 54.27 h for 9-OHFl in the Antarctic. In consideration of the lower temperature and less microorganisms in polar areas, the photodegradation can be a key factor in determining the fate of OH-PAHs in sunlit surface snow/ice. To the best of our knowledge, this is the first report on the photodegradation of OH-PAHs in polar areas. Article in Journal/Newspaper Antarc* Antarctic Arctic Lancaster University: Lancaster Eprints Antarctic Arctic The Antarctic Chemosphere 155 375 379 |
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Lancaster University: Lancaster Eprints |
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ftulancaster |
language |
unknown |
description |
Hydroxyl polycyclic aromatic hydrocarbons (OH-PAHs) are derived from hydroxylated PAHs as contaminants of emerging concern. They are ubiquitous in the aqueous and atmospheric environments and may exist in the polar snow and ice, which urges new insights into their environmental transformation, especially in ice. In present study the simulated-solar (λ > 290 nm) photodegradation kinetics, products and pathways of four OH-PAHs (9-Hydroxyfluorene, 2-Hydroxyfluorene, 1-Hydroxypyrene and 9-Hydroxyphenanthrene) in ice were investigated, and the corresponding implications for the polar areas were explored. It was found that the kinetics followed the pseudo-first-order kinetics with the photolysis quantum yields (Φs) ranging from 7.48 × 10−3 (1-Hydroxypyrene) to 4.16 × 10−2 (2-Hydroxyfluorene). These 4 OH-PAHs were proposed to undergo photoinduced hydroxylation, resulting in multiple hydroxylated intermediates, particularly for 9-Hydroxyfluorene. Extrapolation of the lab data to the real environment is expected to provide a reasonable estimate of OH-PAH photolytic half-lives (t1/2,E) in mid-summer of the polar areas. The estimated t1/2,E values ranged from 0.08 h for 1-OHPyr in the Arctic to 54.27 h for 9-OHFl in the Antarctic. In consideration of the lower temperature and less microorganisms in polar areas, the photodegradation can be a key factor in determining the fate of OH-PAHs in sunlit surface snow/ice. To the best of our knowledge, this is the first report on the photodegradation of OH-PAHs in polar areas. |
format |
Article in Journal/Newspaper |
author |
Ge, Linke Li, Jun Na, Guangshui Chen, Chang'er Huo, Cheng Zhang, Peng Yao, Ziwei |
spellingShingle |
Ge, Linke Li, Jun Na, Guangshui Chen, Chang'er Huo, Cheng Zhang, Peng Yao, Ziwei Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas |
author_facet |
Ge, Linke Li, Jun Na, Guangshui Chen, Chang'er Huo, Cheng Zhang, Peng Yao, Ziwei |
author_sort |
Ge, Linke |
title |
Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas |
title_short |
Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas |
title_full |
Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas |
title_fullStr |
Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas |
title_full_unstemmed |
Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas |
title_sort |
photochemical degradation of hydroxy pahs in ice: implications for the polar areas |
publishDate |
2016 |
url |
https://eprints.lancs.ac.uk/id/eprint/79682/ https://doi.org/10.1016/j.chemosphere.2016.04.087 |
geographic |
Antarctic Arctic The Antarctic |
geographic_facet |
Antarctic Arctic The Antarctic |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_relation |
Ge, Linke and Li, Jun and Na, Guangshui and Chen, Chang'er and Huo, Cheng and Zhang, Peng and Yao, Ziwei (2016) Photochemical degradation of hydroxy PAHs in ice: Implications for the polar areas. Chemosphere, 155. pp. 375-379. ISSN 0045-6535 |
op_doi |
https://doi.org/10.1016/j.chemosphere.2016.04.087 |
container_title |
Chemosphere |
container_volume |
155 |
container_start_page |
375 |
op_container_end_page |
379 |
_version_ |
1775352987532656640 |