Researchers at ETH Zurich have developed a groundbreaking method to extract gold from electronic waste, turning discarded devices into high-value 22-carat gold nuggets. This innovative process works by dissolving gold from electronic motherboards using an eco-friendly solution, and then recovering it in solid, pure form. Unlike traditional gold mining, which often involves toxic chemicals like cyanide and mercury, this technique offers a cleaner, more sustainable alternative. It also reduces the need for harmful mining practices that cause significant environmental damage, including deforestation and soil erosion.
The environmental impact of this discovery is significant, especially given the growing problem of electronic waste (e-waste), which is currently the fastest-growing waste stream in the world. The United Nations estimates that the global e-waste generation reached over 53 million metric tons in 2019, with only around 20% of it being properly recycled. By turning e-waste into valuable resources like gold, this new process helps reduce landfill overflow and minimizes the release of hazardous substances such as lead, mercury, and cadmium into the environment. This breakthrough not only recovers precious metals but also supports a circular economy, where materials are reused instead of being discarded, contributing to more sustainable and responsible electronics recycling practices. More