Distribution of Butyltins in Sediments of The Kaohsiung Ocean Disposal Site

Chih-Feng Chen, Cheng-Di Dong, Chiu-Wen Chen



The distribution of butyltin (BT) compounds in sediments of the Kaohsiung Ocean Disposal Site (KODS) was investigated in this study. The sediment samples which collected from nine disposed stations and two reference stations in the KODS in 2009 and 2010 were analyzed for monobutyltin (MBT), dibutyltin (DBT), and tributyltin (TBT). Experimental readings showed that in 2009 the concentration of total butyltins (ΣBTs) varied from 0.3 to 1.5 ng Sn/g dw for disposed stations, and 2.6 ng Sn/g dw only reference stations, for which most of BTs came from TBT. Whereas 2010 the BTs concentration varied from 0.3 to 69.3 ng Sn/g dw for disposed stations, and 0.4 to 2.2 ng Sn/g dw for reference stations, for which most of BTs came from TBT. Referring to the TBT-contaminated sediment classification, the sediment samples collected from disposed stations in 2010 could be classified as moderately to highly contaminated, and disposal site in 2009 could be classified as uncontaminated. On the other hand, when referring to the Oslo and Paris (OSPAR) biological effects of assessment, the TBT concentration within the sediment samples of disposed stations in 2010 might affect benthos but not necessarily responded for females to be sterile, and in 2009 of the biological response caused by TBT concentrations was below the environmental assessment criteria for the disposal site.


Keywords: Dibutyltin (DBT); Monobutyltin (MBT); Ocean disposal; Tributyltin (TBT)