Orthogonal Study of Biodegradation of Lubricating Oil Accelerated by Lauroyl Glycine

Abstract

Different contents of lauroyl glycine were incorporated into HVI 350 mineral lubricating oil and the biodegradabilities of the formulated oils were evaluated on a biodegradation tester. Thereafter, the interaction affections of four influencing factors, viz. lubricating oil content, lauroyl glycine, microbe nutriments and oxygen supply, on biodegradation of HVI 350 lubricating oil in soils were studied based on a L9(3 4 ) orthogonal array test. The results indicated that lauroyl glycine obviously promoted biodegradation of HVI 350 lubricating oil, especially at the lauroyl glycine contents of about 1.0~1.5%. Of the four influencing factors, the effect of lauroyl glycine on biodegradation of HVI 350 lubricating oil in soils proved to be the most significant in various biodegradation durations, demonstrating that lauroyl glycine markedly contributed to the biodegradation of the lubricating oil.

Synthesis and Tribological Performance of Phosphate Ester Containing Nitrogen from Methyl Oleate in Rapeseed Oil

“…In this context, issues relating to the environmental pollution caused by using traditional mineral lubricant draw much attention. Development of environmental friendly lubricant which can be biodegraded gradually becomes the focus of this field and the most important thing is to develop the additives (Wang and Li, 2010;Liu et al, 2010;Luo and Li, 2010;Chen et al, 2010). Methyl oleate as one of the main components of biodiesel, which was used as an important biomass fuel, has a great potential application prospect in lubricant domain for its less environmental hazards, renewable property and good anti-wear and anti-friction performance caused by the unique chemical structure (Yao and Min, 2010a, b).…”