Influence of the type of exchangeable cation on the electrolytic conductivity of bentonite suspensions

The electrolytic conductivity of bentonite aqueous suspensions was investigated. The starting material (Ca-Mont) was exchanged with sodium ions, using an ion exchange column. The sodium form of bentonite (Na-Mont) was used to obtain organobentonites. The electrolytic conductivity of the starting mat...

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Bibliographic Details
Published in:Hemijska industrija 2003, Vol.57 (5), p.215-218
Main Authors: Dakovic, Aleksandra, Raonic, Tanja, Matijasevic, Srdjan, Tomasevic-Canovic, Magdalena, Radosavljevic-Mihajlovic, Ana
Format: Article
Language:English
Subjects:
Bentonite
Cation exchanging
Columns (structural)
Conductivity
Electrolytic conductivity
Organo-bentonite
Sodium
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Summary:The electrolytic conductivity of bentonite aqueous suspensions was investigated. The starting material (Ca-Mont) was exchanged with sodium ions, using an ion exchange column. The sodium form of bentonite (Na-Mont) was used to obtain organobentonites. The electrolytic conductivity of the starting material, Na-Mont and organobentonites was studied for different suspension concentration. The highest value of the electrolytic conductivity was obtained for Na-Mont, while the organic cation in the bentonite structure decreased the electrolytic conductivity. Proucavana je provodljivost vodenih suspenzija bentonita. Polazni Ca-bentonit (Ca-Mont) je jonskom izmenom u jonoizmenjivackoj koloni preveden u Na-oblik, a zatim su iz Na-bentonita (Na-Mont) sintetitisani organobentoniti-Do-Mont (100-Na), Pr-Mont (50-Na) i Pr-Mont (100-Na). Odredivana je provodljivost polaznog, Na-Mont i organobentonita, pri razlicitim koncentracijama vodenih suspenzija (5-20 mas%). Najveca vrednost provodljivosti je dobijena za 20% suspenziju Na-Mont, dok organski katjon u strukturi bentonita smanjuje njegovu provodljivost.
ISSN:0367-598X
2217-7426
DOI:10.2298/HEMIND0305215D