Electrokinetic and rheological properties of Na-bentonite in some electrolyte solutions

DUMAN O., TUNÇ S.

MICROPOROUS AND MESOPOROUS MATERIALS, cilt.117, sa.1-2, ss.331-338, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 117 Sayı: 1-2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.micromeso.2008.07.007
  • Dergi Adı: MICROPOROUS AND MESOPOROUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.331-338
  • Anahtar Kelimeler: Bentonite, Electrolyte solutions, Zeta potential, Electrokinetic properties, Rheology, MONTMORILLONITE SUSPENSIONS, SODIUM MONTMORILLONITE, ZETA-POTENTIALS, BEHAVIOR, ADSORPTION, PH, DISPERSIONS, VISCOSITY
  • Akdeniz Üniversitesi Adresli: Evet

Özet

Electrokinetic and rheological properties of Na-bentonite suspensions were investigated in the presence of various electrolyte solutions including LiCl, NaCl, KCl, NH4Cl, NaClO4, CH3COONa, NaNO3, Na2SO4, Na3PO4, CuCl2, MnCl2, CaCl2, BaCl2, NiCl2 and AlCl3. It was found that divalent cations (CU2+, Mn2+, Ca2+, Ba2+ and Ni2+) and trivalent cation (Al3+) were potential determining cations for the Na-bentonite suspensions. Trivalent cation, Al3+, changed the Surface charge of Na-bentonite from negative to positive. The zeta potential measurements showed that monovalent counter-cations and mono-, di- and tri-valent anions were indifferent ions for the Na-bentonite suspensions. The plastic viscosity and the Bingham yield stress values of the Na-bentonite suspensions were also determined in the presence of electrolyte solutions. (C) 2008 Elsevier Inc. All rights reserved.