1Open University of Kaohsiung, Siaogang District, Kaohsiung City 812, Taiwan.
2Department of Environmental Engineering and Science, National Pingtung University of Science and Technology, Pingtung 907, Taiwan.
3Kainan University, No.1 Kainan Road, Luzhu, Taoyuan 338, Taiwan.
4Department of Resources Engineering, National Cheng Kung University, Tainan 701, Taiwan.
Email: [email protected], [email protected].