Lubricating oil was an important resource and a petroleum base product. The high price of lube oil and objective of saving valuable foreign exchange had resulted in efforts for regeneration of used engine lube oil and converted it for useful products. Mismanagement of waste engine lube oil was a serious worldwide environmental problem, unfortunately, most of used oil was handled improperly, and some is emptied into sewers for going directly into waste water. Some was dumped directly into the ground to kill weeds or was poured into dirty roads or is dumped in deserts, where it could contaminate surface and ground water, and some garages may be sold it for wood painting, or it may be used in heating resulting in air pollution. So all of these ways were adversely affecting the environment.
Very Interesting question, similar to my case. Could you check one of the spesial journal in .... (lets me check first....)
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