1. Water Environment and Remediation Center, P.O. Box 131, Cheonryang, Seoul, 130-650, Korea, (Email: seocklee@kist.re.kr; khahn@kist.re.kr)
2. Konkuk University, Department of Environmental Engineering, Innovative Environmental Technology Center, 1 Hwayang-dong, Gwangjin-gu, Seoul, 143-701, Korea, (Email: jhkweon@konkuk.ac.kr; yhlife@konkuk.ac.kr)