Department of Biochemistry and Microbiology, IB, Sao Paulo State University, UNESP, Av 24 A, no 1515, Rio Claro, Sao Paulo 13506-900, Brazil.
Bull Environ Contam Toxicol. 2010 Apr;84(4):454-8. doi: 10.1007/s00128-010-9945-8. Epub 2010 Feb 24.
The objective of this study was to evaluate the environmental behavior of different types of automotive lubricant oils. Based on respirometry assays the biodegradability was monitored, and toxicological tests were executed to assess the lubricants toxicity before and after microbial activity. Used oil was the most biodegradable, however, it was the most toxic. Also, all lubricants presented toxicity even after biodegradation due to 40% Eruca sativa germination inhibition and a low LC50 to Eisenia foetida (0.50-0.25 mL). Moreover, used automotive lubricants have a high toxicity because of polycyclic aromatic hydrocarbons concentration that establishes them as a potential carcinogen.
本研究旨在评估不同类型汽车润滑油的环境行为。基于呼吸计测定法，监测了生物降解性，并进行了毒理学试验，以评估微生物活性前后的润滑剂毒性。废油的生物降解性最高，但毒性也最大。此外，所有的润滑剂在生物降解后仍具有毒性，因为 40%的芝麻发芽受到抑制，对赤子爱胜蚓的 LC50 值较低（0.50-0.25 毫升）。此外，由于多环芳烃浓度较高，使用过的汽车润滑油具有较高的毒性，这使其成为一种潜在的致癌物。
