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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 6, Number 2
JKCSEZ 6(2)
April 20, 1962

Title	Industrial Waters of Taegu City and on the Objection of Iron for Water Softening 대구시의 공업용수와 철의 연화장해에 관하여
Author	Dae Soo Lee, Soon Yung Hong 이대수, 홍순영
Keywords
Abstract	The waters throught Taegu area for 87 points were analysed and according to the analytical data, following unfavorable characteristics for industrial uses were given: (1) Shows strong hardness, (2) Has high ratio of ignition residue to evaporation residue, (3) pH value is over 7, (4) Contains considerable quantities of iron. And then investigated the exchange rate and regeneration level of iron ion using cation exchange resin, Lewatit KS. When the hard water containing 2.2 ppm of iron 18.4 ppm of calcium and 6.2 ppm of magnesium was passed through the ion exchange resin under 3cc/cm2/min in exhaustant flow rate, exchange rate of iron reached to 42% after 300 hours flow. The exchange efficiency shows abrupt decreasing in initial stage of flow up to 100 hours flow. The exchanger which contains iron was generated with 10% sodium hydroxide aqua solution under SV (space velocity) 4. By this method, 57% of iron was eliminated from exchanger while calcium and magnesium are removed as much as 85%, 57% of iron was eliminated from exchanger while calcium and magnesium are removed as much as 85% and 87% respectively.
Page	117 - 121
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