Fate and tidal transport of butyltin and mercury compounds in the waters of the tropical Bach Dang Estuary (Haiphong, Vietnam).
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 (~3 kg TBT/day) and dry (~3 g MMHg/day) seasons.
Laboratoire de Chimie Analytique Bio-Inorganique et Environnement, UMR 5254 IPREM, CNRS, Université de Pau et des Pays de l'Adour, 2 Avenue Président Pierre Angot, 64053 Pau, France.
Patricia
P
Navarro
David
D
Amouroux
Nghi Duong
ND
Thanh
Emma
E
Rochelle-Newall
Sylvain
S
Ouillon
Robert
R
Arfi
Thuoc Chu
TC
Van
Xavier
X
Mari
Jean-Pascal
JP
Torréton
D001493:Bathing Beaches / Q000706:statistics & numerical data; D004784:Environmental Monitoring; D017669:Mercury Compounds / Q000032:analysis*; D014220:Trialkyltin Compounds / Q000032:analysis*; D014329:Tropical Climate; D014744:Vietnam; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
D017669:Mercury Compounds; D014220:Trialkyltin Compounds; D014874:Water Pollutants, Chemical; C011559:tributyltin