한강유역의 (漢江流域) 크롬이온 분포에 (分布) 관한 연구 = The Research on the Content of Chromium ion in the Water of the Han river near the Seoul area

다국어 초록 (Multilingual Abstract)

The authors investigated the present status of the chromium, DO and pH in the water of the Han river and its branches. The contents of chromium, DO and pH was measured twice in September 20th and November 22nd during 1974, on the An yang stream, Jeong neung stream, Jung ryang stream and Han river (main). 1. In September, at St. 1 and 2 on the Jeong neung stream chromium ion was determined 0.05ppm and 0.09ppm, and at the St. 4 and 5 on the Jung ryang stream chromium ion was determined 0.05 ppm 0.11 ppm, at the St. 6 where the confluence of Jung ryang stream and Chung gae stream and at the St. 7 and 8 on the An yang stream chromium ion was not detected in this month. 2. In November, on the Jeong neung stream chromium ion was not detected and on the Jung ryang stream chromium ion was determined 0.06 ppm and 0.07 ppm. At the St. 6 chromium ion was determined 0.05 ppm and at the St. 7 and 8 on the An yang stream chromium ion was determined 0.01 ppm. Both in September and November, the chromium ion was not detected at the St. 9 and 10 on the Han river (main).