Removal Of Tributyltin (TBT) From Wastewater By Microalgae
Author(s)
N. F. Y. Tam, A. Chong & Y. S. Wong
Abstract
Removal of tributyltin (TBT) from wastewater
by microalgae
N. F. Y. Tam, A. Chong & Y. S. Wong
' ~ e ~ a r t m e n t of Biology and Chernistly,
City University of Hong Kong, Hong Kong, China.
Abstract
The biosorption and biodegradation of tributyltin (TBT) by free cells of a
resistant rnicroalgal species, Chlorella sorokiniana at two different densities,
1x10~ cells ml" (low) and 1 x107 (high) were investigated. TBT in contaminated
water was continuously removed by rnicroalgal cells and reached a 54% and 74%
removal at the end of 14 days treatment in low and hgh density cultures,
respectively. The pattern of TBT removal in both densities was similar: with the
decreases of TBT in water, TBT uptake by algal cells increased, reached a peak
and declined to low levels towards the end of the treatment period. In the high
density culture, total amounts of TBT uptake, including the adsorption on cell
surface and absorption inside the cells, increased from 109 to 159pg TBT' from
days 1 to 7, then decli
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