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The deposition of haematite particles from flowing water
Author(s) -
Williamson R.,
Newson I.,
Bott T. R.
Publication year - 1988
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450660107
Subject(s) - deposition (geology) , suspension (topology) , reynolds number , laminar flow , particle deposition , particle (ecology) , materials science , tube (container) , range (aeronautics) , metallurgy , chemistry , chemical engineering , composite material , mechanics , sediment , physics , geology , turbulence , mathematics , homotopy , pure mathematics , paleontology , oceanography , engineering
Deposition of 0.2 μ haematite (α – Fe 2 O 3 ) particles from suspension in turbulently flowing water, Reynolds Number = 11000, onto metal tube surfaces has been studied with particular reference to the effect of pH. Measurements on stainless steel showed trivial deposition outside the pH range 5 to 8. Within this range deposition rose sharply to a peak at pH = 6.2. This is similar to the findings of Kuo and Matijevic (1980) who studied haematite particle deposition onto a packed bed of stainless steel beads under laminar flow conditions. This shows that particle/surface interactions govern deposition in this system and that hydrodynamic and geometric factors are secondary.