Environmental Engineering Reference
In-Depth Information
Table 10
Degradation of TBT compounds in water
/
sediment mixtures [67, 68]
Organotin,
Half life
Comment
Publication Refs.
Medium
year
Entuarine
/
sediment
3.8 years
Georges River, Australia
1993
[92]
estimated from
sediment core data
Entuarine
/
sediment
0.9-5.2 years
Southeast England
1993
[93]
estimated from
sediment core data
Fresh water,
1.2 years
Much longer in
1993
[94]
estuarine
/
sediment
anaerobic sediments
TBT, fresh water
/
>
11 months
Sterile
1978
[95]
sediment
TBT, fresh water
/
4 months
Toronto Harbor, Canada
1988
[96]
sediment
tonema costatum
and
Skeletonema tropicum
,theirhalf-livesbecomeonly
approx. 2 days (see Fig. 7) [97].
Adelman et al. [98] studied radiolabeled TBT in a 13-m
3
marine enclo-
sure with a near-natural water column and benthos. TBT and its degradation
products were monitored for 278 days. TBT concentration in the water col-
umn (initially 590
20 ng L
-1
) decreased at a rate of 0.20 g
-1
for 15 days and
then slowed to 0.10 day
-1
±
[98]. Lines were fit to the data and first-order re-
Fig. 4
Radiolabeled TBT into a 13-m
3
marine enclosure with near-natural water column
and benthos [98]
