1. Dept. of Chemical and Biological Engineering, Univ. of Missouri-Rolla, Rolla, MO 65409.
2. Dept. of Chemical and Biological Engineering, Univ. of Missouri-Rolla, 143 Schrenk Hall, Rolla, MO 65409 (corresponding author).
3. Dept. of Civil, Architectural and Environmental Engineering, Univ. of Missouri-Rolla, Rolla, MO 65409.