Occurrence, sources and risk assessment of polycyclic aromatic hydrocarbons in the coral reef waters of the Lakshadweep Archipelago, Arabian Sea.

Autor: Vignesh ER; CSIR - National Institute of Oceanography, Regional Centre, Kochi 682 018, India; Cochin University of Science and Technology, Kerala, India., Gireeshkumar TR; CSIR - National Institute of Oceanography, Regional Centre, Kochi 682 018, India. Electronic address: gkumar@nio.org., Arya KS; CSIR - National Institute of Oceanography, Regional Centre, Kochi 682 018, India; Cochin University of Science and Technology, Kerala, India., Nair MM; CSIR - National Institute of Oceanography, Regional Centre, Mumbai 400 053, India., Rakesh PS; CSIR - National Institute of Oceanography, Regional Centre, Mumbai 400 053, India., Jayadev BS; CSIR - National Institute of Oceanography, Regional Centre, Kochi 682 018, India., Asma Shirin PP; CSIR - National Institute of Oceanography, Regional Centre, Kochi 682 018, India.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2024 Mar; Vol. 200, pp. 116123. Date of Electronic Publication: 2024 Feb 07.
DOI: 10.1016/j.marpolbul.2024.116123
Abstrakt: The compound effects of anthropogenic disturbances on global and local scales threaten coral reef ecosystems of the Arabian Sea. The impacts of organic pollutants on the coral reefs and associated organisms have received less attention and are consequently less understood. This study examines the background levels, sources, and ecological implications of polycyclic aromatic hydrocarbons (PAHs) in the coral reef ecosystems of Lakshadweep Archipelago. Water and particulate matter were collected from four coral Islands (Kavaratti, Agatti, Bangaram and Perumal Par) of Lakshadweep Archipelago during January and December 2022 and analysed for 15 PAHs priority pollutants. The 15 PAHs congeners generally ranged from 2.77 to 250.47 ng/L in the dissolved form and 0.44 to 6469.86 ng/g in the particulate form. A comparison of available data among the coral reef ecosystems worldwide revealed relatively lower PAHs concentrations in the Lakshadweep coral ecosystems. The isomeric ratios of individual PAH congeners and principal component analysis (PCA) indicate mixed sources of PAHs in the water column derived from pyrogenic, low-temperature combustion and petrogenic. The risk quotient (RQ) values in the dissolved form indicate moderate risk to the aquatic organisms, while they indicate moderate to severe risk in the particulate form.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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