Purdue University Produced Water Process (IMAGE) Purdue University Caption A new Purdue University process uses activated charcoal foam and subjects it to solar light to produce heat and purify produced water. Credit Purdue University/Ashreet Mishra Usage Restrictions None License Licensed 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.