Kristen Villebrun and Wendy Bush hoped they wouldn't have to pray for Chedoke Creek, but four years after they first raised alarm about the water's condition, they were part of an Indigenous full moon ceremony to do just that. About 50 people showed up near Princess Point on the dark and frigid Monday evening for the monthly ceremony, which was particularly special as it focused on Chedoke Creek. The body of water that runs into Cootes Paradise had about 24 billion litres of sewage and storm water runoff leak into it due to a gate being left open.
A United Nations body has affirmed earlier findings that Canada's largest national park remains under environmental threats from dams, oilsands development and climate change. The UNESCO report, issued Friday, concludes that the vast Wood Buffalo National Park on the Alberta-Northwest Territories boundary shouldn't lose its place on the list of World Heritage Sites at this time. Some things in the park, such as whooping crane numbers, are improving.
David Schindler, the trailblazing researcher widely regarded for his tireless defence of Canada's freshwater systems from industrial harm, has died. Schindler rose to prominence in the 1970s and early '80s with landmark experiments that sounded the alarm on acid rain and led the federal government to ban high-phosphorus laundry detergents. His 2010 research into Alberta's oilsands pushed the government to establish independent oversight of the industry, after he showed it was contributing contaminants to the region's watershed.
Wastewater from oilsands mining operations have long been a challenge for Canada's energy industry, much of it ending up in industrial tailings ponds. But scientists and engineers at the University of Calgary are taking aim at eliminating watery tailings from the oilsands production process with the help of specialized liquid salt. Hot water is used in oilsands mining operations to extract the oily bitumen from the sand, with the resulting wastewater ending up in tailings ponds to settle and later be reused. Alberta has an estimated 1.3 trillion litres of fluid tailings sitting in tailings ponds.
New technology developed by engineers at the University of Alberta shows potential in cleaning and decontaminating process water from oilsands production. The process relies on ozonation and biofilters to remove organic compounds from contaminated water. The study, published in Science of the Total Environment, demonstrates that the method, previously used to clean pharmaceutical waste water, efficiently removes naphthenic acids, considered to be one of the main contaminants in oilsands process water.
