1. Department of Chemistry, National Sun Yat-sen University, Kaohsiung 804, Taiwan
2. Department of Environmental Engineering, Da-Yeh University, No. 168, University Rd., Dacun, Changhua 515006, Taiwan
3. Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Kraków 30-059, Poland
4. School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan