Ma W C, Immerzeel J, Bodt J
Department of Ecotoxicology, Institute for Forestry and Nature Research, Wageningen, Netherlands.
Ecotoxicol Environ Saf. 1995 Dec;32(3):226-32. doi: 10.1006/eesa.1995.1108.
The present study describes some novel phenomena with regard to the environmental fate of polycyclic aromatic hydrocarbons (PAHs) in the terrestrial soil environment. Laboratory experiments were conducted on: (1) the influence of earthworms on the disappearance rate of PAHs in soil, and (2) the bioaccumulation of these compounds in the earthworm body. It is demonstrated that the disappearance of phenanthrene and fluoranthene in soil is accelerated by the presence of the earthworm Lumbricus rubellus. Possible explanations and practical implications of this effect are discussed. In the bioaccumulation part of the study it is demonstrated that earthworms may take up and accumulate fluoranthene and, to a lesser extent, also phenanthrene in their body tissues. Bioaccumulation was found to be reduced by changes in bioavailability associated with aging of the PAH-amended soil. Finally, it was observed that earthworms indicate a strongly enhanced bioaccumulation of PAHs under conditions of food limitation.
本研究描述了多环芳烃（PAHs）在陆地土壤环境中的环境归宿方面的一些新现象。进行了实验室实验，内容包括：（1）蚯蚓对土壤中PAHs消失速率的影响，以及（2）这些化合物在蚯蚓体内的生物累积。结果表明，赤子爱胜蚓的存在加速了土壤中菲和荧蒽的消失。讨论了这种效应的可能解释和实际意义。在研究的生物累积部分，结果表明蚯蚓可能在其身体组织中摄取并累积荧蒽，在较小程度上也累积菲。发现与PAH改良土壤老化相关的生物可利用性变化会降低生物累积。最后，观察到在食物受限的条件下，蚯蚓体内PAHs的生物累积显著增强。
