1. International Program in Hazardous Substance and Environmental Management, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand, Tel. ; Fax:
2. Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Bangkok 10330, Thailand
3. Faculty of Engineering, Department of Chemical Engineering, Thammasat University, Pathumthani, Thailand, Tel. ; Fax:
4. Center of Excellence in Environmental Catalysis and Adsorption, Thammasat University, Pathumthani, Thailand
5. Department of Environmental Resources Management, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan, Tel. , ext. 1401; Fax: