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Butyltins in the sediments of Kochi and Mumbai harbours, west coast of India.

Abstract：

:Surface sediment samples were collected from various locations in the Mumbai and Kochi harbours, west coast of India, to assess the presence of butyltin compounds. Tributyltin (TBT) and dibutyltin (DBT) varied from 16 to 16,816 ng/g dry wt. and from undetected to 469 ng/g dry wt., respectively, of the sediment in Kochi harbour. In Mumbai harbour, the values of TBT and DBT ranged between 4.5 and 1193 ng/g dry wt. and from undetected to 131 ng/g dry wt. of the sediments, respectively. The concentrations of both TBT and DBT showed strong seasonal variation probably due to the effect of tides and currents. Nevertheless, the levels of butyltin compounds were generally higher at sites influenced by shipping activities such as navigation, dry dock and ship-building activities. The presence of DBT indicates the abiotic or microbiological degradation of TBT. Compared to TBT, DBT was relatively less abundant, suggesting either fresh inputs of TBT and/or less degradation of TBT. The concentrations of TBT showed significant positive relationships with organic carbon and lipid, implying that both lipophilic and ionic interactions were probably involved in controlling the abundance of TBT at these sediments. The observed levels of butyltin compounds are much higher than those required to induce toxic effects on marine organisms, suggesting that these sediments were contaminated with butyltin compounds.

journal_name

Environ Int

journal_title

Environment international

authors

Bhosle NB,Garg A,Harji R,Jadhav S,Sawant SS,Krishnamurthy V,Anil C

doi

10.1016/j.envint.2005.08.020

subject

Has Abstract

pub_date

2006-02-01 00:00:00

pages

252-8

issue

2

eissn

0160-4120

issn

1873-6750

pii

S0160-4120(05)00193-5

journal_volume

32

pub_type

杂志文章

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