1. School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), San 31 Hyoja-dong Nam-gu Pohang 790-600, Republic of Korea, Department of Environmental Engineering, Green Technology Institute, Jinju National University, 150 Chilam-dong Jinju 660-758, Republic of Korea, and Research Center, GS Plasma Technology Company, 461-38 Jeonmin-dong Yuseong-gu Daejeon 305-811, Republic of Korea