期刊
MARINE POLLUTION BULLETIN
卷 64, 期 9, 页码 1789-1798出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2012.05.036
关键词
Methylmercury; Butyltin compounds; Tropical estuary; Surface water; Tidal flux
资金
- EC2CO French National Program through the HAIPHONG project
- ANR CES program through the IDEA project
- Basque Government (Education, Universities and Research Department)
- IRD (France)
In this work, two field campaigns were performed in July 2008 (wet season) and March 2009 (dry season) to produce original data on the concentration, partition and distribution of mercury and butyltin compounds along the tropical Bach Dang Estuary located in North Vietnam (Haiphong, Red River Delta). The results demonstrate that mercury and butyltin speciation in the surface waters of this type of tropical estuary is greatly affected by the drastic changes in the seasonal conditions. During high river discharge in the wet season, there was a large estuarine input of total Hg and tributyltin, while the longer residence time of the waters during the dry season promotes increasing MMHg formation and TBT degradation. Although most of the Hg and TBT is transported into the estuary from upstream sources, tidal cycle measurements demonstrate that this estuary is a significant source of TBT and MMHg during the wet (similar to 3 kg TBT/day) and dry (similar to 3 g MMHg/day) seasons. (C) 2012 Elsevier Ltd. All rights reserved.
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