1. School of Environmental Science and Engineering & Pohang Accelerator Laboratory, Pohang University of Science and Technology, San 31, Hyoja dong, Pohang 790-784, Republic of Korea
2. Air Protection Research Team, Research Institute of Industrial Science and Technology, San 32, Hyoja dong, Pohang 790-784, Republic of Korea
3. Department of Chemical Engineering, Cheju National University, Cheju, 690-756, Republic of Korea
4. Department of Environmental Engineering, Jinju National University, 150 Chilamdong, Jinju, Kyungnam 660-758, Republic of Korea