1. Department of Engineering and Science Education, Clemson University, 262 Sirrine Hall, Clemson, S.C. 29634, USA
2. Department of Chemistry and Biochemistry, University of Mississippi, P.O. Box 1848, University, MS 38677, USA
3. Department of Environmental Engineering and Earth Sciences, Clemson University, 262 Sirrine Hall, Clemson, S.C. 29634, USA