CIMAR/CIIMAR-Centro Interdisciplinar de Investigação Marinha e Ambiental and Faculdade de Ciências, Universidade do Porto, R. Campo Alegre 687, 4169-007, Porto, Portugal.
Environ Monit Assess. 2009 Dec;159(1-4):183-90. doi: 10.1007/s10661-008-0621-y. Epub 2008 Nov 19.
This work aimed to report present levels (2007-2008 sampling) of tri- (TBT), di- (DBT), and monobutyltin (MBT) in surface sediments from 11 Portuguese coastal sites and discuss the evolution of BTs contamination in the last two decades. All the samples revealed quantifiable values of TBT, DBT, and MBT with total butyltin concentrations between 1 and 565 ng/g (of Sn in dry sediment). Maximum level of TBT, 66 ng/g, was observed in Sado estuary, at Lisnave site, in the proximity of a big shipyard. MBT decreased site by site by the same order as DBT and TBT did, but its concentrations were much higher in many cases, denoting that TBT contamination was much higher in the past. A comparison with the available previous data confirmed a marked decrease of TBT contamination all over the last years, indicating that the main sources of TBT in Portuguese coastwise stopped effectively.
本研究旨在报道 2007-2008 年期间葡萄牙 11 个沿海地区表层沉积物中三丁基锡（TBT）、二丁基锡（DBT）和单丁基锡（MBT）的现有水平，并讨论过去二十年来 BTs 污染的演变情况。所有样品均显示出 TBT、DBT 和 MBT 的可量化值，总丁基锡浓度在 1 至 565ng/g（干沉积物中 Sn 的浓度）之间。在萨多河口的 Lisnave 站点，TBT 的浓度最高，达到 66ng/g，这是在一个大型造船厂附近观察到的。MBT 的浓度与 DBT 和 TBT 一样，呈逐站点递减的趋势，但在许多情况下，其浓度要高得多，这表明过去 TBT 的污染程度要高得多。与现有可用数据的比较证实，近年来 TBT 污染明显减少，表明葡萄牙沿海水域 TBT 的主要污染源已有效停止。
