Environmental Fate of Organosilicon Chemicals
Environmental Fate of Organosilicon Chemicals
复制标题
有机硅化学品的环境归宿
DOI：
10.1007/978-94-009-2989-0_24
复制
发表时间：
1988
影响因子：
4.1
通讯作者：
J. Parsons
中科院分区：
文献类型：
--
作者：
A. Opperhuizen;G. Asyee;J. Parsons
在从自然水环境中获得的非生物样品中，有证据表明存在来自自生来源的硅酮。然而，也有报道称，a-生物转化可能在这些化学品的环境命运中发挥重要作用。特别是，粘土催化的水解可能是重要的。到目前为止，人们对微生物转化硅化合物的能力知之甚少。由于大多数有机硅化合物在水中的溶解度很低，而在有机溶剂中的溶解度很高，因此预计这些化合物会在生物体中积累到很高的浓度。然而，这并不是在鱼类或哺乳动物的实验室测试中发现的，也不是在自然环境中采样的生物群中发现的。生物积累系数低的原因可能是短链有机硅的高清除率和对长链化学物质的缺乏吸收。
In a-biotic samples obtained from the natural aquatic environment evidence has been reported for the presence of silicones from antropogenic sources. It has also been reported however that a-biotic transformation may play an important role in the environmental fate of these chemicals. In particular clay catalyzed hydrolysis may be important. Hitherto little is known about the ability of (micro)organisms to transform silicon compounds. Since most organosilicon compounds are che micals with very low aqueous solubilities and high solubilities in organic solvents it was expected that these chemicals would accumultae to high concentrations in organisms. This however, is not what has been found in laboratory tests with fish or mammals, or in biota sampled in the natural environment. The low bioaccumulation factors may be explained by high rates of elimination of the short chain silicones and by a lack of uptake for the long chain chemicals.