Cleaning Oil Sands Process Affected Water (IMAGE) University of Alberta Caption In this image, University of Alberta civil engineering graduate student Zengquan Shu simulates the solar UV/chlorine treatment process. Laboratory-scale tests found the solar UV/chlorine treatment process removed 75 to 84 per cent of the toxins found in oil sands process affected water. Credit UAlberta Civil and Environmental Engineering 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.