1. Department of Environmental Engineering, National Cheng Kung University, 1, University Road, Tainan 70101, Taiwan, ROC, Department of Chemical Engineering, Cheng-Shiu Institute of Technology, 840, Chengching Road, Kaohsiung 833, Taiwan, ROC, Graduate Institute of Environmental and Occupational Health, Medical College, National Cheng Kung University, 138, Sheng-Li Road, Tainan 70428, Taiwan, ROC