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As the third largest crude oil reserve country in the world, it extracted more than 2.3 million barrels of oil from the oil sands of Alberta, Canada, every day last year. The entire excavation process still requires the consumption of a large amount of water resources. Although most of them are recyclable, they still cause serious pollution that is difficult to recover and cause serious threats to the local ecological environment. Canadian researchers have tried to use solar-activated nanotechnology to remove contaminants from the water, and it is more efficient and cheaper to clean up than today.
The extraction of bitumen-based crude oil from oil sands requires the addition of hot water and mixing and stirring steps. The Alberta local government stated that 85-90 waters are recycled and reusable, but the water will be injected into the tailings pond and cleaned up after a series of sewage disposal. However, due to the cleanup is not in place, resulting in a radius There is a corresponding problem in the area of ​​77 square kilometers. And these discharged water will leak into the nearby water supply system, increasing the risk of soil pollution and animal pollution.
Research experts from the University of Waterloo have now developed new solutions that are more efficient and less costly. Based on photocatalysis, they activate ultraviolet light to chemically react with titanium dioxide molecules to kill bacteria, fungi and other organisms in the water. Previously, photocatalysis was widely used in air purification clothes and self-cleaning windows and walls.
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