Cellulose sponge (IMAGE) Northwestern University Caption The sponge, coated with nanoparticles that have an affinity for pollutants, can collect metals like zinc and copper, as well as phosphate, and in previous iterations has successfully pulled lead from water, and microplastics and oil from lakes and oceans. It then releases these valuable resources when it is exposed to different pH’s. Credit Please credit to Dravid Lab/Northwestern University Usage Restrictions Please credit to Dravid Lab/Northwestern University License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.