Hydrometallurgical processes involve the extraction of metals from their ores using aqueous solutions. This method typically includes steps like leaching, where chemicals dissolve the desired metal, followed by separation and purification techniques. It is often used for metals such as copper, gold, and nickel. This approach is generally more environmentally friendly compared to traditional pyrometallurgical methods, which rely on high temperatures. Hydrometallurgy can also be more efficient for certain ores, allowing for the recovery of metals from low-grade sources. Overall, it plays a significant role in the recycling of metals and the sustainable management of resources.