Quintas Pamela Y, Arias Andrés H, Oliva Ana L, Domini Claudia E, Alvarez Mónica B, Garrido Mariano, Marcovecchio Jorge E
Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
Instituto Argentino de Oceanografía (IADO), Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
Ecotoxicol Environ Saf. 2017 Nov;145:518-527. doi: 10.1016/j.ecoenv.2017.07.052. Epub 2017 Aug 4.
Levels of tributyltin and its breakdown compounds, including the first record of monobutyltin (MBT) in history for Latin America, were determined in native mussels (Brachidontes rodriguezii) by means of CG-MS, after extraction/derivatization assisted by ultrasound. The samples were collected in 2013 in Bahía Blanca Estuary (Argentina) at 6 sites, which reflect different levels of maritime activities. Total butyltins (TBts = TBT+ DBT+ MBT) levels ranged from 19.64 to 180.57ng Sn g dry weight. According to the Oslo-Paris commission, the results indicated that 73.9% of mussels could be under biological effects risks associated with TBT pollution. In accordance with the calculated bioaccumulation factors, approximately 56% of samples appeared to have accumulated TBT through the sediments. All sampling sites were shown to be impacted by organotin compounds (OTCs) showing variable levels through seasons, which could be related with the variation of the water temperature. Degradation index analyses suggested aged inputs of TBT possibly under a general degradation process at the area of study. In addition, the occurrence of DBT and MBT could not be uniquely attributed to the degradation pathway of the TBT; in fact, results outlined the possible contribution of some punctual and diffuse sources at the area such as proximity to plastic industries, industrial effluents, sewage outlets and domestic wastewaters.
通过超声辅助萃取/衍生化后，利用气相色谱 - 质谱联用仪（CG - MS）测定了本地贻贝（Brachidontes rodriguezii）中三丁基锡及其分解化合物的含量，其中包括拉丁美洲历史上首次记录到的单丁基锡（MBT）。2013年在阿根廷布兰卡湾河口的6个地点采集了样本，这些地点反映了不同程度的海上活动。总丁基锡（TBts = TBT + DBT + MBT）含量范围为19.64至180.57纳克锡/克干重。根据奥斯陆 - 巴黎委员会的标准，结果表明73.9%的贻贝可能面临与三丁基锡污染相关的生物效应风险。根据计算出的生物累积因子，约56%的样本似乎是通过沉积物积累了三丁基锡。所有采样点均显示受到有机锡化合物（OTCs）的影响，且含量随季节变化，这可能与水温变化有关。降解指数分析表明，在研究区域，三丁基锡可能处于一般降解过程中，存在老化输入。此外，二丁基锡和单丁基锡的出现不能唯一归因于三丁基锡的降解途径；事实上，结果表明该区域一些点状和分散源可能有贡献，如靠近塑料行业、工业废水、污水排放口和生活污水。
