1. Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, Ohio 45221-0012, United States
2. Office of Research and Development, US Environmental Protection Agency, Cincinnati, Ohio 45220-2242, United States
3. Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221-0172, United States
4. Department of Electrical Engineering and Computer Science, University of Cincinnati, Cincinnati, Ohio 45221-0030, United States