1. Institute
for Materials Chemistry and Engineering, Kyushu University, 6-1,
Kasuga Koen, Kasuga 816-8580, Japan
2. Department
of Earth Resources Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
3. Research
Centre for Geotechnology, Indonesian Institute of Sciences (LIPI), Jl.
Sangkuriang Komplek LIPI, Gd. 70, Bandung 40135, Indonesia
4. Research
and Education Center of Carbon Resources, Kyushu University, 6-1,
Kasuga Koen, Kasuga 816-8580, Japan