IMPORTANCE OF MICROALGAE IN THE BIODEGRADATION OF TRIBUTYLTIN IN ESTUARINE WATERS
IMPORTANCE OF MICROALGAE IN THE BIODEGRADATION OF TRIBUTYLTIN IN ESTUARINE WATERS
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DOI：
10.1021/es00070a010
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发表时间：
1989-12-01
影响因子：
11.4
通讯作者：
SELIGMAN, PF
中科院分区：
文献类型：
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作者：
LEE, RF;VALKIRS, AO;SELIGMAN, PF
在格鲁吉亚沿岸沿着的一条河口河流中发现了低浓度的三丁基锡（TBT）（>5纳克/升）。添加到这些沃茨的三丁基锡化合物（放射性标记和未标记）的半衰期为3至13天。表明微藻在阳光照射的沿海沃茨中三丁基锡化合物降解中发挥重要作用的证据包括：（1）与黑暗降解相比，三丁基锡化合物在光照下的降解率较高，没有证据表明三丁基锡化合物发生光解;（2）（羟丁基）锡和二丁基锡是硅藻和甲藻培养物在光照下的主要降解产物，而在黑暗中仅观察到二丁基锡;（3）添加硝酸盐后，TBT在阳光下的降解率增加。在含有有机锡的封闭水域中，刺激藻类生长可能有用，因为密集的藻类养殖可以迅速降解这些有机金属化合物。
Low concentrations of tributyltin (TBT) (>5 ng/L) were found in an estuarine river along the Georgia coast. Half-lives of TBT (both radiolabeled and unlabeled) added to these waters ranged from 3 to 13 days. Evidence suggesting that microalgae play an important role in TBT degradation in sunlit coastal waters included the following: (1) TBT degradation rates were high in light compared to dark degradation and there was no evidence of TBT photolysis; (2) (hydroxybutyl)tins and dibutyltin were the major degradation products in the light and by cultures of diatoms and dinoflagellates, while only dibutyltin was observed in the dark; (3) TBT degradation increased in sunlight when nitrate was added. Stimulation of algal growth may be of use in enclosed aquatic areas with organotins, since dense algal cultures can rapidly degrade these organometallic compounds.