Removal of model organic precursors by coagulation

E. E. Chang, P. C. Chiang, H. J. Hsing, S. Y. Yeh

研究成果: 雜誌貢獻文章同行評審

8 引文 斯高帕斯(Scopus)


Low-molecular-weight organics, i.e., phloroglucinol (P), resorcinol (R), and p-hydroxybenzoic acid (PHBA), were selected as the target compounds to evaluate their removal and precursor reduction efficiency by coagulation under the presence of high-molecular-weight compounds. The results of this investigation reveal that turbidity removal efficiencies can achieve 95% and above, but the total organic carbon removal for P, R, and PHBA are not remarkable, which are less than 20%. The chlorine demand after 168 hour is: P≅PHBA>R>humic acids (HA)>tannic acid (TA); while the order of trihalomethanes (THM) formation is R>P>PHBA>HA>TA, which is strictly dependent upon the nature of the model compounds. By applying the developed dissolved organic carbon (DOC) removal model, both the maximum adsorption capacity and the residual DOC can be well predicted after coagulation. In this developed model, the adsorption capacity (a) is a function of the sorbable part of organic compounds (fsorbable), which can be expressed as: a=e2.67fsorbable, both shown in nature and synthetic water samples. The fnonsorb increased as the molecular weight (MW) of the target compounds decreased, suggesting that low-MW target compounds could not be easily adsorbed on the flocs.
頁(從 - 到)69-76
期刊Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
出版狀態已發佈 - 1月 2007

ASJC Scopus subject areas

  • 岩土工程與工程地質
  • 化學工程 (全部)
  • 環境工程
  • 水科學與技術
  • 廢物管理和處置
  • 環境科學 (全部)


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