1. Department of Environmental Science and Technology Faculty of Design Technology Osaka Sangyo University Nakagaito 574-8530 Daito Osaka Japan
2. Department of Chemistry Graduate School of Science Kobe University 1-1, Rokkodai, Nada 657-8501 Kobe Japan
3. Research Center for Membrane and Film Technology Kobe University 1-1, Rokkodai, Nada 657-8501 Kobe Hyogo Japan