New Method Removes Particles from Water (IMAGE) Princeton University, Engineering School Caption Researchers at Princeton University have found a way to clean particles from water by mixing in carbon dioxide. The gas changes the water's chemistry, which causes particles to move to one side of the water depending on their chemical charge. By taking advantage of the motion, the researchers can split a water stream and filter out suspended particles. Credit Stone et al Usage Restrictions Non-commercial use 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.