A water filtration membrane(80/40) is a semi-permeable barrier used to remove impurities from water by allowing only certain molecules, like water, to pass through while blocking contaminants such as bacteria, viruses, salts, and organic matter. Common types include reverse osmosis (RO), nanofiltration, ultrafiltration, and microfiltration membranes, each designed for different levels of filtration. These membranes are widely used in drinking water treatment, wastewater recycling, and industrial processes to produce clean, safe water.80/40