Presence of perchlorate in marine sediments from Antarctica during 2017–2020

Perchlorate of natural origin is a persistent pollutant that affects thyroid function by inhibiting iodine uptake, and this pollutant is frequently detected in different ecosystems at concentrations that can harm human health. In this study, we measured the perchlorate concentrations in 3,000 marine...

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Bibliographic Details
Published in:Environmental monitoring and assessment 2022-02, Vol.194 (2), p.102-102, Article 102
Main Authors: Acevedo-Barrios, Rosa, Rubiano-Labrador, Carolina, Miranda-Castro, Wendy
Format: Article
Language:English
Subjects:
Antarctic Regions
Atmospheric Protection/Air Quality Control/Air Pollution
Earth and Environmental Science
Ecology
Ecosystem
Ecotoxicology
Endocrine disruptors
Environment
Environmental Management
Environmental Monitoring
Environmental science
Expeditions
Geologic Sediments
Humans
Iodine
Marine sediments
Monitoring/Environmental Analysis
Multiship expeditions
Perchlorate
Perchlorates
Perchloric acid
Pollutants
Sediment samplers
Sediment samples
Sediments
Spatial variations
Thyroid
Thyroid gland
Uptake
Volcanic eruptions
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Summary:Perchlorate of natural origin is a persistent pollutant that affects thyroid function by inhibiting iodine uptake, and this pollutant is frequently detected in different ecosystems at concentrations that can harm human health. In this study, we measured the perchlorate concentrations in 3,000 marine sediment samples from January to March in 2017, 2018, 2019, and 2020 during the 3 rd , 4 th , 5 th , and 6 th Colombian Scientific Expeditions to Antarctica. The sampling zones were located at 15 different points on the South Shetland Islands and Antarctic Peninsula, and they were measured using a selective perchlorate electrode. The concentration data indicate that perchlorate reached a minimum concentration of 90 ppm on Horseshoe Island and a maximum concentration of 465 ppm on Deception Island, suggesting a spatial variation in perchlorate concentrations that can be attributed to the natural formation of this pollutant due to volcanic eruptions. Additionally, homogeneous distribution of perchlorate was not observed in Antarctica.
ISSN:0167-6369
1573-2959
DOI:10.1007/s10661-022-09765-4