Unlocking the value in mining waste to reduce its environmental harm

Mining the metals and minerals needed for the clean energy transition carries a significant environmental cost. One of the primary hazards is pyrite, a common mineral in mining waste that oxidizes on contact with air and water, producing sulfuric acid and releasing heavy metals into surrounding waterways. Removing pyrite from mining waste streams could reduce this harm – and because pyrite contains extractable sulfur and critical metals, it could also generate economic value. To achieve this, the researchers will first quantify the extractable materials available, then use AI-driven computational screening to optimize chemical reagents for pyrite extraction. The goal is a framework that aligns economic incentives with environmental protection, making cleaner, safer mining more financially viable.

Above: Heavy mining machinery extracting minerals in an open pit mine. Image credit:  William Luque / iStock