서울 -部地域井戶水의 망간， 크롬含量 調査硏究

A study was carried out to determine the content of Mn and Cr in the ground water in Seoul area, where municipal water supply system was not installed, from Nov. 1 to Nov. 30, 1973. 1n this study, authors examined the hardness, pH, water temperature and CI ion to investigate the general conditions of the ground water. For this study, samples were collected from 46 wells which were located in outpart of Seoul city, and Mn and Cr were determined with the Spectronic-20. The following results were obtained: 1) Average value of the ground water conditions of the wells were 13.30C in temperature, pH-6.3, hardness 159 ppm and CI ion 41 ppm. 2) 1n the manganese concentration, the highest area was Yeongdeungpo-Ku(O. 318 ppm), while the lowest area was Sungbuk-KuCO. 065 ppm) and the rnean concentration of the whole district was O. 196 pprn. 3) 1n the chrome concentration, the highest area was Yeongdeungpo-KuCO. 031 pprn), while the lowest area was Dobong-Ku (trace) and the rnean concentration of the whole district was 0.012 pprn.