ADSORPTION OF ALACHLOR BY MONTMORILLONITES

The adsorption of the tertiary aromatic amide alachlor by Na-montmoril lonite and Al-polyhydroxy-montmorillonite was investigated by DTA, XRD , SEM and Thermo-FTIR Spectroscopy. This molecule is adsorbed into the interlayer space of the montmorillonite, replacing interlayer water. In this organo-clay complex the interlayer water forms hydrogen bonds with N or O atoms of the tertiary amide group. Samples which were aged during six months degraded by hydrolysis to give mainly secondary ami de. This reaction was catalysed by Al-polyhydroxy-montmorillonite more than by Na-montmorillonite.