期刊
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
卷 31, 期 5, 页码 947-954出版社
WILEY
DOI: 10.1002/etc.1793
关键词
Imposex; Reduction; Southern Brazil; Organotin; Temporal trend
资金
- CNPq (Brazilian National Research Council) [141550/2007, PQ 311459/2006-4, 314335/2009-9]
The imposex incidence was appraised in South American gastropods, considering the scenario before and after the global ban of tributyltin (TBT). A statistically significant reduction in imposex indexes was observed in Stramonita haemastoma collected in 2006 and 2010 from areas under the influence of four coastal harbors from southern Brazil. This reduction may be because of the effectiveness of the global ban issued by the International Maritime Organization, although the restrictions on TBT-based antifouling paints in Brazil might also have helped. Even so, a residual organotin contamination was still detected in female tissues (levels ranged from 7.6 to 164.9 ng Sn/g for TBT; from <2 to 214.5 ng Sn/g for dibutyltin; from <3.5 to 178.8 ng Sn/g for monobutyltin; and from <1.5 to 53 ng Sn/g for triphenyltin). Thus, although a reduction in imposex and environmental levels of organotins is expected in every ocean worldwide soon after the implementation of national and international restriction regulations, this will depend on the effectiveness of the global TBT ban; the effectiveness of local restrictions on producing, selling, and using TBT-based antifouling paints; and specific characteristics of local sediments, because metabolization rates and sorption/desorption of TBT previously deposited might affect its environmental bioavailability. Therefore, the reduction trend detected in the present study cannot be extrapolated to other Brazilian or South American coastal areas. Environ. Toxicol. Chem. 2012; 31: 947954. (c) 2012 SETAC
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据