A Quebec-based company has pioneered a cyanide-free method to extract gold while simultaneously capturing harmful arsenic, offering a significant breakthrough for environmentally responsible mining.
- Gold extracted without toxic cyanide chemicals
- Arsenic transformed into stable, non-toxic glass
- Process significantly speeds up gold recovery
What happened
Dundee Sustainable Technologies, a chemical firm based in Quebec, has developed a groundbreaking method to extract gold from mineral ores without the use of cyanide. Their process uses safer chemicals like sodium hypochlorite and sodium hypobromite at room temperature and ambient pressure, reducing the extraction time from 36 hours to just 2 hours. This newer approach recycles all chemicals within a closed loop system to minimize waste.
Additionally, Dundee’s patented GlassLock technology captures arsenic, a toxic byproduct of many mining operations, by converting it into an inert and stable glass using mixtures of silica, recycled glass, and hematite. This vitrified product significantly reduces arsenic’s environmental impact, making disposal and processing much safer and easier for mining companies.
Why it feels good
This innovation represents a major step forward in cleaning up the mining industry, which traditionally has relied on harmful chemicals and created environmental risks such as toxic tailings ponds. Eliminating cyanide from the extraction process reduces the chances of pollution events caused by weather or accidents and aligns well with strict environmental, social, and governance (ESG) standards followed by modern mining companies.
For communities and ecosystems near mines, this breakthrough offers hope for less toxic pollution and a healthier environment. Mining firms also benefit from reduced regulatory burdens and risks, making projects potentially more economically viable while supporting sustainable resource development.
What to enjoy or watch next
Mining companies are beginning to adopt Dundee’s technology, including Freegold Ventures Limited, which is testing the GlassLock process as part of preparations for developing one of the Americas’ largest undeveloped gold resources in Alaska. Tests have shown gold recovery rates of 95% while isolating 98% of arsenic as non-toxic glass, dramatically lowering its toxicity levels.
As this technology gains traction, it will be exciting to watch how the mining industry evolves and embraces safer chemical innovations. These advancements promise not only cleaner gold extraction but also important benefits for water quality, wildlife, and communities living near mining operations worldwide.