Effects of polydiallyldimethyl ammonium chloride coagulant on formation of chlorinated by products in drinking water

E. E. Chang, P. C. Chiang, S. H. Chao, C. H. Liang

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The objectives of this research work was to evaluate the reduction of THM precursors by cationic p-DADMAC and determine the correlations between the chlorine demand and trihalomethane formation in the presence of electrolyte solutions and ambient light. The chlorine demand was found to be significantly reduced provided that the H2SO4 electrolyte was fed to the sample solutions. The amount of CHCl3 formation was also decreased when the Na2SO4 electrolyte was introduced in spite of the levels of light intensity. The p-DADMAC can not only effectively remove the turbidity but also reduce the formation of CHCl3. The optimum dosage of p-DADMAC for reducing the turbidity, TOC and CHCl3 in the humic acid and source water samples was determined and depended upon the nature of organics.

Original languageEnglish
Pages (from-to)1333-1346
Number of pages14
JournalChemosphere
Volume39
Issue number8
DOIs
Publication statusPublished - Oct 1999

Keywords

  • Cationic polymer
  • Chlorine demand
  • Polydiallyldimethyl ammoniun chloride (p-DADMAC)
  • Polyelectrolyte
  • TOC
  • Trihalomethane (THM)

ASJC Scopus subject areas

  • Environmental Chemistry
  • Environmental Science(all)

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