Purifying water with waste materials

Sand, coral and even waste building materials can become extremely efficient sorbents for removing toxic substances such as arsenic from water if they are treated for that purpose. Scientists of Tomsk Polytechnic University (TPU) have revealed a new technology that purified 3.6 m3 of water using 200 grams of sorbent from available raw materials, the cost of which will be a little more $1 to end consumers.