REMOVAL OF DISSOLVED-OXYGEN FROM WATER - A COMPARISON OF 4 COMMON TECHNIQUES

IB BUTLER*, MAA SCHOONEN, DT RICKARD, Ian Butler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Four common techniques for the removal of dissolved oxygen from water have been examined: boiling at 1 atm, boiling under reduced pressure, purging with N2 and sonication under reduced pressure. After treatment, the residual oxygen in solution was analysed by the Winkler method. Nitrogen purging for 20-40 min at flow rate of 25 mL/s was found to be the most effective oxygen removal method. Boiling at 1 atm was found to be the least effective. None of the techniques evaluated here lead to complete removal of oxygen. The concentration of residual dissolved oxygen after purging for 20-40 minutes with nitrogen is 0.2-0.4 ppm.

Original languageEnglish
Pages (from-to)211-215
Number of pages5
JournalTalanta
Volume41
Issue number2
Publication statusPublished - Feb 1994

Keywords

  • OXIDATION
  • DIAGRAMS
  • PYRITE

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