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Degradation of tributyltin chloride in water photoinduced by iron(III)

✍ Scribed by Gilles Mailhot; Michel Astruc; Michèle Bolte

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 113 KB
Volume: 13
Category: Article
ISSN: 0268-2605
DOI: 10.1002/(sici)1099-0739(199901)13:1<53::aid-aoc814>3.0.co;2-5

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✦ Synopsis

The degradation of tributyltin chloride (TBT) photoinduced by iron(III) was investigated. Upon irradiation at l excitation b300 nm a photoredox process was observed, yielding iron(II) and

. OH radicals. The disappearance of TBT was proved to involve only an attack by

. OH radicals: the quantum yield of TBT disappearance was determined. A wavelength effect was observed; the shorter the excitation wavelength, the higher the rate of TBT disappearance. Most of the photoproducts were identified and the mechanism of degradation was elucidated. The main route to degradation is a stepwise debutylation of TBT to di-and mono-butyltin with final formation of inorganic tin. The complete mineralization of TBT was achieved with long irradiation times, leading to innocuous inorganic tin.

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