U of S team helping decontaminate soil in Canada’s North

Biochar is a type of charcoal that results from heating biological ingredients, such as wood and bone, in a low- or no-oxygen environment – a process known as pyrolysis. In southern climates, biochar has proven environmental benefits when added to soil, including enhanced soil fertility, improved plant growth, and degradation of contaminants.

"It's a case of ‘One man's trash is another man's treasure,'" said Derek Peak, associate professor of soil science and co-investigator on the project. "We use materials that are otherwise considered waste to make a product that decontaminates soil."

"Our goal is to reduce soil restoration costs and increase restoration success in northern Canada by providing a local source of biochar that is specifically formulated for northern soil restoration."

The team, led by soil science professor Steve Siciliano, will use the Canadian Light Source synchrotron to analyze contaminated soil before and after the addition of biochar. One of the project's test sites is a former petroleum storage facility in Meadow Lake, Saskatchewan where this research is aimed at finding improved methods of managing petroleum impacts in the soil and groundwater.

The project is funded by a $660,600 "Idea to Innovation" grant from the Natural Sciences and Engineering Research Council of Canada (NSERC) with additional support from Yukon College and industry partners, including Federated Cooperatives Limited, Nunatta Environmental, and Zakus Farms.

Producing biochar in the North presents some technical hurdles, such as limited access to pyrolysis machines and cow bones, which are often used to make biochar. The research team is using locally available sources, such as fish, whale and bison bone, to produce biochar.

Siciliano noted that Yukon College has a biochar development program with Zakus Farms.

"Together, the U of S and Yukon College have the expertise, experience and know-how needed to solve the challenges associated with the commercialization of biochar for northern needs," Siciliano said.

Northern-sourced biochar will create a new market for remediation materials produced near where the contaminated soil is found.  The research team is already working with industry partners to find the optimal bone biochar for their soil restoration efforts.