Reduction of natural organic matter and disinfection by-product precursors by coagulation and adsorption

E. E. Chang, Pen Chi Chiang, Su Huei Chao, Chung Huei Liang

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Source water from King-Men Reservoir water in Taiwan was treated by alum and polyaluminum chloride coagulation, and the corresponding natural organic matter was fractionated by ultrafiltration membranes for determining its molecular weight (MW) distribution to provide the baseline information for further investigation. Due to the characteristics of the source-water nature, a lower alum dosage could reduce the total organic carbon (TOC) concentration by a great amount (25%), while the difference in TOC removal efficiency was found to be insignificant at a higher dosage (60-90 mg/L) and even operating in a lower pH range. The results show that the larger MW coagulant polyaluminum chloride, having higher-charge neutralization and bridging capacities, exhibits better performance than the lower MW alum. In addition, the granular-activated carbon-adsorption process provides a relatively lower THMFP in the treated water at the same level of trihalomethanes and to lower the coagulant doses demand as well.

Original languageEnglish
Pages (from-to)57-64
Number of pages8
JournalPractice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Issue number1
Publication statusPublished - Jan 2004


  • Abatement and removal
  • Adsorption
  • Coagulation
  • Organic matter
  • Taiwan
  • Water treatment

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Chemical Engineering(all)
  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Environmental Science(all)


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