Toxicity and biodegradation in sandy soil contaminated by lubricant oils.
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.
Lopes
Paulo Renato Matos
PR
Department of Biochemistry and Microbiology, IB, Sao Paulo State University, UNESP, Av 24 A, no 1515, Rio Claro, Sao Paulo 13506-900, Brazil.
Montagnolli
Renato Nallin
RN
de Fátima Domingues
Renata
R
Bidoia
Ederio Dino
ED
D000818:Animals; D001673:Biodegradation, Environmental; D019607:Brassicaceae / Q000187:drug effects / Q000378:metabolism; D018525:Germination / Q000187:drug effects; D054327:Lubricants / Q000378:metabolism* / Q000633:toxicity*; D009821:Oils / Q000378:metabolism / Q000633:toxicity; D009835:Oligochaeta / Q000187:drug effects / Q000378:metabolism; D011084:Polycyclic Aromatic Hydrocarbons / Q000378:metabolism / Q000633:toxicity; D012989:Soil Pollutants / Q000378:metabolism* / Q000633:toxicity*
D054327:Lubricants; D009821:Oils; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants