We take it for granted. We turn on the kitchen or bathroom faucets in our homes and offices with every expectation that the water we receive is uncontaminated and not dangerous to our health. Unfortunately, pure water has become extinct. In this day and age, we cannot assume that water is pollutant-free—regardless of the source. Just because it comes out of our kitchen faucet, its purity is not guaranteed. Newspapers and television newscasts report almost daily how water pollution is increasing from the sewage and industrial waste being dumped directly into our drinking water sources.
Western Engineering investigates freezing technique for water treatment
Western Engineering researchers have teamed up with Core Geoscience Services Inc. (CoreGeo) in a project to investigate the use of cryopurification – water treatment by freezing – for treating contaminated water in a mine in Northern Canada. It is a nature-inspired technology based on physics pointing to ice crystals as essentially made up of pure water. “When contaminated water is gradually frozen, ice crystals of pure water grow while the contaminants are rejected from the crystal structure into the liquid phase. The technology has shown to be effective for the removal of contaminants from aqueous solutions and has the potential to decontaminate water resources to provide a safe and clean water supply,” explained Ajay Ray, professor, department of chemical and biochemical engineering.