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Contaminated cooking oil sickened more than 1,860 people. The symptoms were called Yushō disease. [59] In Okinawa, high levels of PCB contamination in soil on Kadena Air Base were reported in 1987 at thousands of parts per million, some of the highest levels found in any pollution site in the world. [115]
Oil sludge or black sludge is a gel-like or semi-solid deposit inside an internal combustion engine, that can create a catastrophic buildup. It is often the result of contaminated engine oil and occurs when moisture and/or high heat is introduced to engine oil.
Later investigations revealed that the source of the contamination came from an oil-and-fat-recycling company, Verkest, from Deinze. The fats were reprocessed into animal feed that also contained transformer oil (coolant fluid), a known source of PCBs. Public concern about the quality of animal food in general became a hot issue in the media.
Law enforcement agents in Italy and Spain investigated efforts to make counterfeit and inedible olive oil, leading to the seizure of over 68,000 gallons of contaminated oil and 11 arrests ...
The scandal, which implicates China’s largest grain storage and transport company Sinograin, and private conglomerate Hopefull Grain and Oil Group, has raised concerns of food contamination in a ...
The most common source of ethylene glycol is automotive antifreeze or radiator coolant, where concentrations are high. [9] Other sources of ethylene glycol include windshield deicing agents, brake fluid , motor oil , developing solutions for hobby photographers, wood stains , solvents, and paints. [ 9 ]
The tramp oil accumulation separates from the aqueous or oil based coolant and can be easily removed with an absorbent. Old, used cutting fluid must be disposed of when it is fetid or chemically degraded and has lost its usefulness. As with used motor oil or other wastes, its impact on the environment should be mitigated.
Soil contaminated with crude oil displays toxic levels of various heavy metals such as lead, zinc and magnesium. Application of mycoremediation techniques to crude contaminated soils have shown significant reductions of heavy metal concentrations. [29] Mechanisms involved in bioremediation of toxic compounds.
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