Mercury accumulation in hydrothermal vent mollusks from the southern Tonga Arc, southwestern Pacific Ocean SCIE SCOPUS

Cited 10 time in WEB OF SCIENCE Cited 10 time in Scopus
Title
Mercury accumulation in hydrothermal vent mollusks from the southern Tonga Arc, southwestern Pacific Ocean
Author(s)
Lee, Seyong; Kim, Se-Joo; Ju, Se-Jong; Pak, Sang-Joon; Son, Seung-Kyu; Yang, Jisook; Han, Seunghee
KIOST Author(s)
Pak, Sang Joon(박상준)Son, Seung Kyu(손승규)
Publication Year
2015-05
Abstract
We provide the mercury (Hg) and monomethylmercury (MMHg) levels of the plume water, sulfide ore, sediment, and mollusks located at the hydrothermal vent fields of the southern Tonga Arc, where active volcanism and intense seismic activity occur frequently. Our objectives were: (1) to address the potential release of Hg from hydrothermal fluids and (2) to examine the distribution of Hg and MMHg levels in hydrothermal mollusks (mussels and snails) harboring chemotrophic bacteria. While high concentrations of Hg in the sediment and Hg, As, and Sb in the sulfide ore indicates that their source is likely hydrothermal fluids, the MMHg concentration in the sediment was orders of magnitude lower than the Hg (<0.001%). It suggests that Hg methylation may have not been favorable in the vent field sediment. In addition, Hg concentrations in the mollusks were much higher (10-100 times) than in other hydrothermal vent environments, indicating that organisms located at the Tonga Arc are exposed to exceedingly high Hg levels. While Hg concentration was higher in the gills and digestive glands than in the mantles and residues of snails and mussels, the MMHg concentrations in the gills and digestive glands were orders of magnitude lower (0.004-0.04%) than Hg concentrations. In summary, our results suggest that the release of Hg from the hydrothermal vent fields of the Tonga Arc and subsequent bioaccumulation are substantial, but not for MMHg. (C) 2015 Elsevier Ltd. All rights reserved.
ISSN
0045-6535
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2499
DOI
10.1016/j.chemosphere.2015.01.006
Bibliographic Citation
CHEMOSPHERE, v.127, pp.246 - 253, 2015
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
MID-ATLANTIC RIDGE; METAL ACCUMULATION; SULFIDE DEPOSITS; GUAYMAS BASIN; METHYLMERCURY; MUSSEL; FLUIDS; BAY; BIOACCUMULATION; SPECIATION
Keywords
Mercury; Monomethylmercury; Hydrothermal vents; Mollusks; Tonga Arc
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

Economic geology,Geochemistry,Resource geology,광상학,지구화학,자원지질학

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