Liquid separation is a process used to separate different liquids based on their physical properties, such as density or solubility. This technique is commonly applied in various industries, including oil refining, chemical manufacturing, and wastewater treatment. Methods like decantation, centrifugation, and filtration help achieve effective separation. In decantation, the denser liquid settles at the bottom, allowing the lighter liquid to be poured off. Centrifugation uses rapid spinning to separate liquids with different densities, while filtration involves passing a mixture through a barrier to separate solids from liquids. These methods are essential for purifying substances and recovering valuable materials.