1. Department of Environmental Science and Engineering, Center for Environmental Studies, Kyung Hee University, Gyeonggi-Do, Korea, 446-701
2. Development Team 2, Environmental Technology Institute, Woongjin Coway Co., Ltd., Woongjin R&D center, San 4, Bongchun 7-dong, Gwanak-gu, Seoul, South Korea, 151-818