High turbidity removal by magnetite particles

Shang Lien Lo, Yung Li Wang, Ching Yao Hu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The high turbidity raw water during the rainstorm period has made the water treatment plants fail to supply applicative water in recent years. How to improve the treating capacity of water treatment plants is an important issue at present. In this study, high turbidity raw water was effectively treated by magnetite (Fe3O4) particles. After magnetization, magnetite particles can reduce turbidity from 9,600 NTU to 20 NTU. Furthermore, magnetite particles are suitable for the pH ranges of drinking water from pH=6.0 to pH=9.0 and an external magnetic field applied during sedimentation increases the removal rate. In addition, the recycle and reuse of magnetite particles were investigated. Magnetite particles were successfully regenerated by cetyltrimethyl ammonium bromide (CTAB) and the effective used times of magnetite particles was five times.

Original languageEnglish
Pages (from-to)40-45
Number of pages6
JournalResearch Journal of Chemistry and Environment
Issue number1
Publication statusPublished - Mar 2008


  • Cetyltrimethyl ammonium bromide (CTAB)
  • High turbidity raw water
  • Magnetite particles

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Environmental Science
  • Biochemistry
  • General Agricultural and Biological Sciences
  • General Earth and Planetary Sciences
  • Renewable Energy, Sustainability and the Environment


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