A study on natural and anthropogenic changes of chemical compositions in the Nakdong river in Korea

Jiyun Kim1, Hye-Bin Choi1, Ui-kyu Choi2 and Jeonghoon Lee3, (1)Ewha Womans University, Seoul, Korea, Republic of (South), (2)Institute of Mine Reclamation Technology, Chenan, Korea, Republic of (South), (3)Ewha Womans University, Department of Science Education, Seoul, Korea, Republic of (South)