Removal of Dissolved Humic Acid with Physicochemical Treatment Process

물리화학적 공정에 의한 용존성 Humic Acid의 제거

  • Kim, Jong-Shik (Department of Chemical Engineering, Keimyung University) ;
  • Choi, Joon-Ho (Department of Chemical Engineering, Keimyung University)
  • 김종식 (계명대학교 화학공학과) ;
  • 최준호 (계명대학교 화학공학과)
  • Received : 1999.04.27
  • Accepted : 1999.07.13
  • Published : 1999.08.10

Abstract

This study was conducted for the two purposes; one was removal of dissolved humic acid, the well-known precursor of trihalomethanes (THMs), by physicochemical treatment processes such as ozone oxidation, coagulation and activated carbon adsorption. The other was qualitative identification of by-products in chlorination of the dissolved humic acid. When ozone oxidation was applied to remove the dissolved humic acid, pH was abruptly decreased. It was indicated that humic acid was not perfectly converted to $CO_2$ and $H_2O$, but to low fatty acid. In coagulation process, the coagulant was polyaluminumchloride which was widely used for drinking water treatment in recent years. With the dosage of 160 mg/L, total organic carbon(TOC), $COD_{Cr}$ and color were removed with 23%, 24% and 5% respectively. Color was effectively removed by ozone oxidation process, which was the first order reaction, with the reaction rate constant of $0.067min^{-1}$. In activated carbon adsorption process, preozonation process could remove more effectively the dissolved humic acid than that without preozonation. When the dissolved humic acid and sodium hydrochloride were reacted with 1 mg-NaOCl/mg-TOC, only trihalomethanes were detected.

References

  1. 高度淨水處理工程에 關한 硏究 韓國水資源公社
  2. 韓國分析科學會誌 v.1 水中의 humic acid 分離 육근성
  3. 東亞大學校環境問題硏究所 硏究報告 v.2 洛東江 水質汚染 解析과 保全對策 시스템 硏究 -THM과 THMFP 特性을 中心으로- 孫晉彦;相澤貴自
  4. Chemical Oxidation, Technologies for the 9th, Proceeding of the First International Symposium v.1 Ozonation of Volatile and Semi-Volatile Compounds for Groundwater Treatment J. Musterman
  5. Standard Methods For Examination of Water and Wastewater, (17th)
  6. Proceeding of the 9the Ozone World Congress v.1 Decomposition of Ozone in Aqueous Solution H. Sugimitsu;S. Okazaki;T. Moriwaki
  7. Handbook of Ozone Technology and Application Mechanisms, Rates and Selectivities of Oxidation of Organic Compounds Initiated by Ozonation in Water R. G. Rice;A. Netzer;Ann Arbor
  8. 公定試驗方法(水質編) 東和技術
  9. Ozone in water Treatment, Cooperative Research Report Reaction with Aquatic Humic Substances Bruno Langlaise;David A. Reckhow;Deborah R. Brink
  10. Proceeding of the 9th Ozone World Congress v.1 R. A. Sierka;G. L. Amy;J. Renna
  11. Ozone in water Treatment, Cooperative Research Report Treatment for Color Removal Bruno Langlaise;David A. Reckhow;Deborah R. Brink
  12. Ozone in water Treatment, Cooperative Research Report Oxidation of Synthetic Chemicals Bruno Langlaise;David A. Reckhow;Deborah R. Brink
  13. Proceeding of the 9th Ozone World Congress v.2 E. R. Lehan;D. A. Reckhow
  14. Proceeding of the 9th Ozone World Congress v.1 Y. Richard;P. Jacq
  15. Proceeding of the 9th Ozone World Congress v.1 H. Paillard;E. LeFebvre;B. Legube
  16. 科學と工業 v.32 北川陸夫