https://phys.org/news/2018-07-photons-metal-ions.html > Assistant Professor of Chemistry and Biochemistry Kenneth Hanson and postdoctoral researcher Sahan Salpage outline their strategy in a new journal article published in Chemical Communications. > "I'm a photochemist, so light is my solution to every problem," Hanson said. "We thought we could use light to separate things that are difficult to purify by other means."