Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Coagulation of Synthetic Reactive Dye Wastewater by Cyanoguanidine-formaldehyde Resin

Cyanoguanidine-formaldehyde Resin에 의한 반응성 염료 응집 특성

  • Nah, In Wook (Environment & Process Technology Division, Korea Institute of Sience and Technology) ;
  • Jin, Yang Oh (Environment & Process Technology Division, Korea Institute of Sience and Technology) ;
  • Hwang, Kyung Yub (Environment & Process Technology Division, Korea Institute of Sience and Technology)
  • 나인욱 (한국과학기술연구원 환경공정연구부) ;
  • 진양오 (한국과학기술연구원 환경공정연구부) ;
  • 황경엽 (한국과학기술연구원 환경공정연구부)
  • Received : 2000.06.29
  • Accepted : 2000.10.13
  • Published : 2000.12.31
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Abstract

The coagulation of anionic colloidal particles by the cyanoguanidine(CG)-formaldehyde resin has been reported to be caused by an electrostatic interaction of the diaminomethylene urea (DU) cation with an anionic surface charge of particles. In this research, 100~500 nm sized cationic cyanoguanidine-formaldehyde resin was synthesized to coagulate anionic dye wastewater, and the results showed that the less pH of aqueous cyanoguanidine-formaldehyde resin solution was, the higher Zeta potential of that was. In case of coagulating 0.4 g/L reactive dye by cyanoguanidine-formaldehyde resin at pH 3, 5, 7, 9, and 11, COD removal and the percent decolorization of synthetic dye wastewater at pH 3 are higher than those of other pH conditions. The COD removal and the percent decolorization of synthetic dye wastewater were 74% and 90% at 400 ppm, pH 3.

시아노구아니딘-포름알데히드 수지에 의한 음이온성 콜로이드 입자의 응집현상은 음이온성 입자의 표면전하와 디아미노메틸렌우레아(diaminomethylene urea: DU) 이온과의 전기적인 작용에 기인한다고 보고되어 있다. 본 논문에서는 음이온성 염료폐수를 응집처리하기 위하여 100~500 nm의 양이온성 시아노구아니딘-포름알데히드 수지를 합성하였고, 응집제 수용액의 pH가 낮을수록 응집제의 Zeta potential은 높게 측정되었다. 농도 0.4 g/L 반응성 염료폐수를 응집처리하였을 경우 pH가 3, 5, 7, 9, 11 중에서 pH가 3인 조건이 다른 pH조건보다 COD, 색도 제거율이 높게 나타났으며, pH 3인 조건에서 400 ppm 주입시 COD 74%, 색도 90% 정도 제거할 수 있었다.

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