1. Dept. of Chemical Engineering, Faculty of Engineering, Khon Kaen Univ., Khon Kaen 40002, Thailand.
2. Dept. of Chemical Engineering, and Constructed Facilities Center, West Virginia Univ., P.O. Box 6102, Morgantown, WV 26506.
3. Dept. of Civil and Environmental Engineering, and Constructed Facilities Center, West Virginia Univ., P.O. Box 6103, Morgantown, WV 26506.