Biomagnification profiles of tributyltin (TBT) and triphenyltin (TPT) in Japanese coastal food webs elucidated by stable nitrogen isotope ratios

被引:33
作者
Murai, Ryota [1 ]
Sugimoto, Atsuko [2 ]
Tanabe, Shinsuke [3 ]
Takeuchi, Ichiro [1 ]
机构
[1] Ehime Univ, Fac Agr, Dept Life Environm Conservat, Matsuyama, Ehime 7908566, Japan
[2] Hokkaido Univ, Fac Environm Earth Sci, Grad Sch Environm Sci, Kita Ku, Sapporo, Hokkaido 0600810, Japan
[3] Ehime Univ, Ctr Marine Environm Studies, Matsuyama, Ehime 7908577, Japan
关键词
Biomagnification; Food web; Stable nitrogen isotope ratio; TBT; TPT;
D O I
10.1016/j.chemosphere.2008.09.004
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The measurement of organotins in the various biotas of coastal food webs with stable nitrogen isotope ratios (delta N-15), which increase 3.4 parts per thousand per trophic level, can provide a biomagnification profile of organotins through food web. In this study, various biological samples were collected from three localities in Western Japan between 2002 and 2003 for analyses. Tributyltin (TBT) and triphenyltin (TPT) were still detected with a maximum of 99.5 and 8.7 ng wet weight g(-1), respectively. Unlike TBT, significant biomagnification of TPT through the food web (expressed by delta N-15) was found in all three localities. The log transformed octanol-water partition coefficient (log K-ow) of TPT of 2.11-3.43 was overlapped by, but was slightly lower than, that of TBT of 3.70-4.70. Thus, this study demonstrates that although these chemicals have a log K-ow lower than 5. at least TPT undergoes significant biomagnification through the food web. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1749 / 1756
页数:8
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