HWAHAK KONGHAK, Vol.36, No.1, 20-26, February, 1998
산성염료패수 처리에서 염료물성에 따른 응집 탈색효율에 관한 연구
A Study on the Effect of Dye Properties on Decolorization of Acid Dye Wastewater with Coagulants
초록
염색폐수의 탈색화 연구를 위하여 산성염료의 특성(zeta potential, 등전점, 용해도, 부분전하 및 중성염착률)을 측정하고, 응집 및 탈색에 미치는 영향을 조사하였다. 본 실험에서는 무기응집제인 aluminum sulphate와 dicyandiamide 계통의 유기응결제를 사용하였다. 산성염료에 대한 응집·탈색률은 염료의 polyamide에 대한 중성염착률이 증가할수록 탈색률이 향상되었가. 무기응집제 aluminium sulphate는 습윤견뢰형 산성염료에 대해서는 양호한 탈색효과를 나타내었으나, 균염형 산성염료에 대해서는 탈색률이 불량하였으며, 유기응결제는 양쪽성 균염형 산성염료인 C.I. Acid Red 52, Acid Blue 7을 제외한 염료의 탈색률이 97% 이상으로 양호한 결과를 나타내었다.
In order to study decolorization of wastewater from a dyeing house, the properties of acid dyes, such as zeta potential, iso-electric point, solubility, partial charge, and neutral dyeingability, were measured and the effect of those properties on coagulation and decolorization was investigated. The coagulants used in this study were aluminium sulphate as an inorganic coagulant and dicyandiamide as an organic coagulant. Coagulation and decolorization rates of coagulants for acid dyes were increased with neutral dyeingability for polyamide. Decolorization effect of the inorganic coagulant for milling-type acid dyes was excellent while the effect for levelling-type acid dyes was poor. The organic coagulant for acid dyes also showed an excellent decolorization rate of more than 97 % except amphoteric levelling-type acid dyes such as C. I. Acid Red 52 and Acid Blue 7.
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