Environmental Engineering Reference
In-Depth Information
Scheme 1
Proposed mechanism for iron(III)-photoinduced degradation of TBT [43]
The complete mineralization of TBT was achieved with a long irradiation
time, leading to innocuous inorganic tin. A mechanism for iron(III)-photo-
induced degradation of TBT is proposed as shown in Scheme 1 [43].
Mailhot et al. [44] considered also that the degradation of TPT carried
out by the photoredox process takes place in iron(III) aquacomplexes. TPT
elimination was proved to come only from attack by hydroxyl radicals gen-
erated upon irradiation at 365 nm of Fe(H
2
O)
5
OH
2+
. The first step is the
formation of a hydroxyl radical adduct with the benzene ring. The main pro-
