摘要
研究了海河河口水在不同条件下对三丁基锡（ＴＢＴ）的降解作用。不同条件下ＴＢＴ的降解半衰期为５．７天～８４．５天。提高温度、光照和加入营养盐和腐殖酸均加快ＴＢＴ的降解，说明ＴＢＴ的降解与生物作用有关。为此，进一步研究了两种藻——淡水斜生栅藻（Ｓｃｅｎｅｄｅｓｍｕｓｏｂｌｉｑｕｕｓ）和生于河口地区的扁藻（Ｐｌａｔｙｍｏｎａｓｓｐ．）及藻液中细菌群落对ＴＢＴ的降解作用。结果表明，光降解是微乎其微的。细菌群落对ＴＢＴ有一定的降解作用，栅藻、扁藻中的细菌群落对ＴＢＴ降解半衰期分别为５４．３天和２０．２天。藻类对ＴＢＴ的降解速度比细菌快很多，是ＴＢＴ降解的主要因素，栅藻、扁藻对ＴＢＴ降解半衰期分别为５．２天和１．７天。
The degradation effects of tributyltin (TBT)by estuarine water under various conditions were studied,the half time of TBT in estuarine water being 5 7～84 5 day.Increase of temperature and sunlight as well as addition of nutrient salt and humic acid enhanced the degradation of TBT.This indicates that biological effect is the main cause of TBT degradation.To confirm this,the degradation of TBT by freshwater algae Scenedesmus obliquus and estuarine algae platymonas sp .as well as the bacteria community in the algae culture were further studied.Results showed that photodegradation of TBT was very slow.The bacteria can degradate TBT to certain extent.The half time of TBT was 54 3 day for the bacteria in S.obliquus culture and 20 2 day for that in platymonas sp.. However,the degradation of TBT by the algae cell was much faster,being the main cause of TBT degradation .The TBT half time was 5 2 day for S.obliquus and 1 7 day for Platymonas sp..
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1997年第2期146-150,共5页
China Environmental Science
基金
国家自然科学基金
委员会资助的八五重大基金
