1. Associate Scientist, Center for Sustainable Environmental Technology, Iowa State Univ., Ames, IA 50011.
2. Assistant Professor, Dept. of Civil and Construction Engineering, Iowa State Univ., Ames, IA 50011 (corresponding author).
3. Professor, Center for Sustainable Environmental Technology, Iowa State Univ., Ames, IA 50011.
4. Professor, Dept. of Chemical Engineering, Iowa State Univ., Ames, IA 50011.
5. Assistant Scientist, Ames Laboratory, Iowa State Univ., Ames, IA 50011.