Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters
Antarctica is a remote and pristine region. Yet it plays a vital role in biogeochemical cycles of global anthropogenic contaminants, such as persistent organic pollution (POPs). This work reports the distribution of legacy and new POPs in surface and depth profiles/deeper water of the Southern India...
Published in: | Environmental Pollution |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2023
|
Subjects: | |
Online Access: | http://raiith.iith.ac.in/11620/ https://doi.org/10.1016/j.envpol.2023.121206 http://raiith.iith.ac.in/11620/1/1-s2.0-S0269749123002087-main.pdf |
id |
ftiith:oai:raiith.iith.ac.in:11620 |
---|---|
record_format |
openpolar |
spelling |
ftiith:oai:raiith.iith.ac.in:11620 2023-09-26T15:10:34+02:00 Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters Qureshi, Asif 2023-03-15 text http://raiith.iith.ac.in/11620/ https://doi.org/10.1016/j.envpol.2023.121206 http://raiith.iith.ac.in/11620/1/1-s2.0-S0269749123002087-main.pdf en eng Elsevier http://raiith.iith.ac.in/11620/1/1-s2.0-S0269749123002087-main.pdf Qureshi, Asif (2023) Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters. Environmental Pollution, 321. p. 121206. ISSN 0269-7491 Civil Engineering Water resources engineering Article PeerReviewed 2023 ftiith https://doi.org/10.1016/j.envpol.2023.121206 2023-08-26T18:25:35Z Antarctica is a remote and pristine region. Yet it plays a vital role in biogeochemical cycles of global anthropogenic contaminants, such as persistent organic pollution (POPs). This work reports the distribution of legacy and new POPs in surface and depth profiles/deeper water of the Southern Indian Ocean (SIO) and the coast of Antarctica (COA). Samples were collected during the 10th Indian Southern Ocean expedition (SOE-10) in the year 2017. Concentrations of ∑HCH (hexachlorocyclohexane), ∑DDT (dichlorodiphenyltrichloroethane), and ∑ENDO (endosulfan) in surface seawater from the SIO region ranged between not detected (ND) to 1.21 pg/Liter (pg L−1) (average. ± s.d.: 0.35 ± 0.42 pg L−1), ND to 1.83 pg L−1 (0.69 ± 84 pg L−1), and ND - to 2.06 pg L−1 (0.56 ± 0., 88 pg L−1), respectively. The concentrations of ∑HCH, ∑DDT, and ∑ENDO in COA ranged from ND to 0.98 pg L−1 (0.25 ± 0.27 pg L−1), ND to 3.61 pg L−1(0.50 ± 1.08 pg L−1), and ND to 2.09 pg L−1 (0.45 ± 0.84 pg L−1), respectively. Concentrations of isomers of endosulfan, and largely of HCHs, suggested an aged source. Some concentration ratios of α-to γ-HCH were close to 1, indicating a contribution from ongoing sources. Results indicate the important role of ocean currents in mediating the transport and detection of OCPs. As such, OCPs dynamics in deeper oceans may play an important role in OCPs cycling in the marine environment. Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean Research Archive of Indian Institute of Technology, Hyderabad (RAIITH) Antarctic Indian Southern Ocean Environmental Pollution 321 121206 |
institution |
Open Polar |
collection |
Research Archive of Indian Institute of Technology, Hyderabad (RAIITH) |
op_collection_id |
ftiith |
language |
English |
topic |
Civil Engineering Water resources engineering |
spellingShingle |
Civil Engineering Water resources engineering Qureshi, Asif Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters |
topic_facet |
Civil Engineering Water resources engineering |
description |
Antarctica is a remote and pristine region. Yet it plays a vital role in biogeochemical cycles of global anthropogenic contaminants, such as persistent organic pollution (POPs). This work reports the distribution of legacy and new POPs in surface and depth profiles/deeper water of the Southern Indian Ocean (SIO) and the coast of Antarctica (COA). Samples were collected during the 10th Indian Southern Ocean expedition (SOE-10) in the year 2017. Concentrations of ∑HCH (hexachlorocyclohexane), ∑DDT (dichlorodiphenyltrichloroethane), and ∑ENDO (endosulfan) in surface seawater from the SIO region ranged between not detected (ND) to 1.21 pg/Liter (pg L−1) (average. ± s.d.: 0.35 ± 0.42 pg L−1), ND to 1.83 pg L−1 (0.69 ± 84 pg L−1), and ND - to 2.06 pg L−1 (0.56 ± 0., 88 pg L−1), respectively. The concentrations of ∑HCH, ∑DDT, and ∑ENDO in COA ranged from ND to 0.98 pg L−1 (0.25 ± 0.27 pg L−1), ND to 3.61 pg L−1(0.50 ± 1.08 pg L−1), and ND to 2.09 pg L−1 (0.45 ± 0.84 pg L−1), respectively. Concentrations of isomers of endosulfan, and largely of HCHs, suggested an aged source. Some concentration ratios of α-to γ-HCH were close to 1, indicating a contribution from ongoing sources. Results indicate the important role of ocean currents in mediating the transport and detection of OCPs. As such, OCPs dynamics in deeper oceans may play an important role in OCPs cycling in the marine environment. |
format |
Article in Journal/Newspaper |
author |
Qureshi, Asif |
author_facet |
Qureshi, Asif |
author_sort |
Qureshi, Asif |
title |
Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters |
title_short |
Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters |
title_full |
Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters |
title_fullStr |
Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters |
title_full_unstemmed |
Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters |
title_sort |
distribution of organochlorine pesticides in surface and deep waters of the southern indian ocean and coastal antarctic waters |
publisher |
Elsevier |
publishDate |
2023 |
url |
http://raiith.iith.ac.in/11620/ https://doi.org/10.1016/j.envpol.2023.121206 http://raiith.iith.ac.in/11620/1/1-s2.0-S0269749123002087-main.pdf |
geographic |
Antarctic Indian Southern Ocean |
geographic_facet |
Antarctic Indian Southern Ocean |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
http://raiith.iith.ac.in/11620/1/1-s2.0-S0269749123002087-main.pdf Qureshi, Asif (2023) Distribution of organochlorine pesticides in surface and deep waters of the Southern Indian Ocean and coastal Antarctic waters. Environmental Pollution, 321. p. 121206. ISSN 0269-7491 |
op_doi |
https://doi.org/10.1016/j.envpol.2023.121206 |
container_title |
Environmental Pollution |
container_volume |
321 |
container_start_page |
121206 |
_version_ |
1778145525947695104 |