New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors
The photochemistry of organic contaminants present in ice is receiving growing attention, given the wide presence of ice during winter in temperate regions as well as Polar and mountain environments. Differences between ice photochemistry and aqueous photochemistry, however, influence the quantitati...
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KeAi Communications Co., Ltd.
2024
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ftdoajarticles:oai:doaj.org/article:28732ad244b448768063e56959063d52 2024-09-15T18:11:48+00:00 New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors Linke Ge Siyuan Wang Crispin Halsall Xuanyan Li Dongxiao Bai Shengkai Cao Peng Zhang 2024-12-01T00:00:00Z https://doi.org/10.1016/j.emcon.2024.100382 https://doaj.org/article/28732ad244b448768063e56959063d52 EN eng KeAi Communications Co., Ltd. http://www.sciencedirect.com/science/article/pii/S2405665024000830 https://doaj.org/toc/2405-6650 2405-6650 doi:10.1016/j.emcon.2024.100382 https://doaj.org/article/28732ad244b448768063e56959063d52 Emerging Contaminants, Vol 10, Iss 4, Pp 100382- (2024) Ice photochemistry Aqueous photochemistry Antibiotics Kinetics Influencing factors Environmental pollution TD172-193.5 article 2024 ftdoajarticles https://doi.org/10.1016/j.emcon.2024.100382 2024-08-05T17:49:05Z The photochemistry of organic contaminants present in ice is receiving growing attention, given the wide presence of ice during winter in temperate regions as well as Polar and mountain environments. Differences between ice photochemistry and aqueous photochemistry, however, influence the quantitative fate and transformation of organic chemicals present in freshwater, marine and ice-cap environments and these differences need to be explored. Here we comparatively studied the ice and aqueous photochemistry of three antibiotics [levofloxacin (LVX), sulfamerazine (SM), and chlortetracycline (CTC)] under the same simulated sunlight (λ > 290 nm). Their photodegradation in ice/water followed pseudo-first-order kinetics, whereby the photolytic rates of LVX in ice and water were found to be similar, SM photodegraded faster in ice, while CTC underwent slower photodegradation in ice. Whether individual antibiotics underwent faster photodegradation in ice or not depends on the specific concentration effect and cage effect coexisting in the ice compartment. In most cases, the fastest photodegradation occurred in freshwater ice or in fresh water, and the slowest photolysis occurred in pure-water ice or in pure water. This can be attributed to the effects of key photochemical reactive constituents of Cl−, HA, NO3− and Fe(III), that exist in natural waters. These constituents at certain levels showed significant effects (P < 0.1) on the photolysis, not only in ice but also in water. However, these individual constituents at a given concentration, serve to either enhance or suppress the photoreaction, depending on the specific antibiotic and the matrix type (e.g., ice or aqueous solution). Furthermore, extrapolation of the laboratory findings to cold environments indicate that pharmaceuticals present in ice will have a different photofate compared to water. These results are of particular relevance for those regions that experience seasonal ice cover in fresh water and coastal marine systems. Article in Journal/Newspaper Ice cap Directory of Open Access Journals: DOAJ Articles Emerging Contaminants 10 4 100382 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ice photochemistry Aqueous photochemistry Antibiotics Kinetics Influencing factors Environmental pollution TD172-193.5 |
spellingShingle |
Ice photochemistry Aqueous photochemistry Antibiotics Kinetics Influencing factors Environmental pollution TD172-193.5 Linke Ge Siyuan Wang Crispin Halsall Xuanyan Li Dongxiao Bai Shengkai Cao Peng Zhang New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors |
topic_facet |
Ice photochemistry Aqueous photochemistry Antibiotics Kinetics Influencing factors Environmental pollution TD172-193.5 |
description |
The photochemistry of organic contaminants present in ice is receiving growing attention, given the wide presence of ice during winter in temperate regions as well as Polar and mountain environments. Differences between ice photochemistry and aqueous photochemistry, however, influence the quantitative fate and transformation of organic chemicals present in freshwater, marine and ice-cap environments and these differences need to be explored. Here we comparatively studied the ice and aqueous photochemistry of three antibiotics [levofloxacin (LVX), sulfamerazine (SM), and chlortetracycline (CTC)] under the same simulated sunlight (λ > 290 nm). Their photodegradation in ice/water followed pseudo-first-order kinetics, whereby the photolytic rates of LVX in ice and water were found to be similar, SM photodegraded faster in ice, while CTC underwent slower photodegradation in ice. Whether individual antibiotics underwent faster photodegradation in ice or not depends on the specific concentration effect and cage effect coexisting in the ice compartment. In most cases, the fastest photodegradation occurred in freshwater ice or in fresh water, and the slowest photolysis occurred in pure-water ice or in pure water. This can be attributed to the effects of key photochemical reactive constituents of Cl−, HA, NO3− and Fe(III), that exist in natural waters. These constituents at certain levels showed significant effects (P < 0.1) on the photolysis, not only in ice but also in water. However, these individual constituents at a given concentration, serve to either enhance or suppress the photoreaction, depending on the specific antibiotic and the matrix type (e.g., ice or aqueous solution). Furthermore, extrapolation of the laboratory findings to cold environments indicate that pharmaceuticals present in ice will have a different photofate compared to water. These results are of particular relevance for those regions that experience seasonal ice cover in fresh water and coastal marine systems. |
format |
Article in Journal/Newspaper |
author |
Linke Ge Siyuan Wang Crispin Halsall Xuanyan Li Dongxiao Bai Shengkai Cao Peng Zhang |
author_facet |
Linke Ge Siyuan Wang Crispin Halsall Xuanyan Li Dongxiao Bai Shengkai Cao Peng Zhang |
author_sort |
Linke Ge |
title |
New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors |
title_short |
New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors |
title_full |
New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors |
title_fullStr |
New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors |
title_full_unstemmed |
New insights into the environmental photochemistry of common-use antibiotics in ice and in water: A comparison of kinetics and influencing factors |
title_sort |
new insights into the environmental photochemistry of common-use antibiotics in ice and in water: a comparison of kinetics and influencing factors |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2024 |
url |
https://doi.org/10.1016/j.emcon.2024.100382 https://doaj.org/article/28732ad244b448768063e56959063d52 |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Emerging Contaminants, Vol 10, Iss 4, Pp 100382- (2024) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2405665024000830 https://doaj.org/toc/2405-6650 2405-6650 doi:10.1016/j.emcon.2024.100382 https://doaj.org/article/28732ad244b448768063e56959063d52 |
op_doi |
https://doi.org/10.1016/j.emcon.2024.100382 |
container_title |
Emerging Contaminants |
container_volume |
10 |
container_issue |
4 |
container_start_page |
100382 |
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1810449367148003328 |