Degradation of Tributyl Tin and Dibutyl Tin Compounds in Environmental Waters

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Abstract
The degradation of tri-n-butyl tin (TBT) and di-n-butyl tin (DBT) compounds in river and sea water samples was studied. In river water (Daini Neya River), TBT was degraded with time, and the concentration of inorganic tin increased. DBT was also degraded with time, and the concentrations of n-butyl tin (MBT) compounds and inorganic tin (the degradation products) increased. The half lives of TBT and DBT were about 11 days and 5 days, respectively. In seawater from Sakaisenboku Harbour (one of the most polluted areas in Osaka Bay), TBT and DBT were degraded in a manner similar to that in Daini Neya River water, but in seawater from other areas of Osaka Bay these compounds were little degraded.

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