Our project, “Cu Later”, aims at using a system of biological components to sequester and remove metal ions from oil and mining tailings ponds. These ponds contain high amounts of toxic metals (such as copper, nickel and lead) that create significant environmental concerns. When mixed with other chemicals, these metals can form acidic compounds that lower the pH of surrounding waters. They can also pose direct threats to aquatic organisms, causing irreversible damages to their nervous, cardiovascular, and reproductive systems. In one instance, the continuous entry of 450 kilograms of copper every day into the Britannia Creek (near a former copper mine in British Columbia) exterminated every aquatic species in the creek. In another instance, over 1,600 ducks died in a Syncrude Canada tailings pond in Northern Alberta when they mistook the pond for a freshwater lake. Upon speaking with a representative from Alberta Energy Regulator (AER), we learned that although there have been regulations in place to limit the production of tailings on the part of energy companies, there is currently no efficient method to treat or extract metals from tailings ponds. Traditional water purification methods, such as distillation, nanofiltration and reverse osmosis are theoretically possible but practically inefficient and extremely expensive. Additionally, we learned that the amount of tailings in Alberta has increased drastically over the past decades, from just below 10 gigalitres in 1970 to over 1,400 gigalitres in 2018. Today, the amount of tailings in Alberta alone is enough to fill 560,000 Olympic-sized pools. With an average depth of five meters, these tailings cover a land area of 280 square kilometers, over one-third the size of the city of Calgary. These statistics are predicted to continue growing in the future, as millions of cubic meters of new tailings are produced every day.

“The big problem in oil sands tailings is the sheer volume, the magnitude of production you’re talking about, it’s millions of cubic meters per day.” --AER Representative

Although the accumulation of toxic tailings is a prevalent challenge in our oil-dependent provincial economy, the environmental concerns they present is a global issue. Their pollution of surrounding water bodies, prolonged damage to aquatic biodiversity, and ever-increasing size are especially detrimental to the global sustainable development effort. Successful implementation of our project will, therefore, benefit both our local industries and the global community.