1. a Department of Safety Health and Environmental Engineering , Chung Hwa University of Medical Technology , Tainan City , Taiwan , Republic of China
2. b Physical Division, Institute of Nuclear Energy Research , Lung-Tan , Taiwan , Republic of China
3. c Department of Environmental Engineering and Science , National Pingtung University of Science and Technology , Ping Tung , Taiwan , Republic of China
4. d Department of Marine Environmental Engineering , National Kaohsiung Marine University , Kaohsiung City , Taiwan , Republic of China