ELECTRICAL-CONDUCTIVITY OF MODIFIED BENTONITES AND FT-IR SPECTROSCOPIC INVESTIGATIONS OF SOME AROMATIC-MOLECULES ADSORBED BY BENTONITES

Electrical conductivity of natural and ion-exchanged Anatolian bentoni tes (Ag-, Cu-) and of different organic molecules (benzidine-, pyrazin e- and 1,4-diamino benzene-) adsorbed by bentonites were investigated. Dc and ac measurement techniques were applied to ribbon and sandwich type samples. Measurements were made under standard pressure, humidity and room temperature. It was observed that conductivity of ion exchan ged Ag-, Cu-bentonite and benzidine-bentonite complexes has increased. In addition. FT-IR spectrometry was used to assign complex pattern an d composition in clay-organic molecule complexes. Spectroscopic invest igations suggest that organic molecules intercalate the interlayers of bentonite with a monolayer arrangement. (C) 1998 Elsevier Science B.V .