DEPOSITIONAL PROFILES AND RELATIONSHIPS BETWEEN ORGANOTIN COMPOUNDS IN FRESH-WATER AND ESTUARINE SEDIMENT CORES

被引：30

作者：

DOWSON, PH

BUBB, JM

LESTER, JN

机构：

[1] Environmental and Water Resource Engineering Section, Department of Civil Engineering, Imperial College of Science, Technology and Medicine, London, SW7 2BU, Exhibition Road

来源：

ENVIRONMENTAL MONITORING AND ASSESSMENT | 1993年 / 28卷 / 02期

关键词：

D O I：

10.1007/BF00547033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A range of organotin compounds including tributyltin (TBT), dibutyltin (DBT) and monobutyltin (MBT) were measured in sediment cores collected from contaminated freshwater and estuarine sites in Essex and Suffolk, U.K. Butyltin compounds were found in significant quantities at depths of up to 60 cm within the sediments of marina and boatyard complexes with TBT concentrations ranging from < 3 ng g-1 (the detection limit) to > 3000 ng g 1. In general sediment TBT concentrations decreased with depth, but maximum enrichment tended to occur just below the surface. It was evident from these core profiles that the accumulation of organotins in surface deposits was on the decline and coincided approximately, with the implementation in 1987 of the UK retail ban on the sale of TBT based antifouling paints for application on vessels < 25 m in length. The degradation rate for TBT in sediments was found to exhibit first order kinetics with half lives ranging from 0.9-5.2 years between different sites. Estimated degradation rates have also been determined for DBT and MBT These ranged from 1.5-3.0 years for DBT and 1.8-3.7 years for MBT.

引用

页码：145 / 160

页数：16

共 24 条

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