Removal of pesticides from water by anionic clays

摘要

The exchange of chloride ions by ions from the pesticide family 2.4-dichlorophe-noxyacetate (2.4D) in [Zn-Al-Cl] anionic clay was investigated by X-ray diffraction and infrared spectroscopy. The effects of 2.4D concentration in solution and temperature on the ion exchange were studied. The best sample in terms of crystallinity, was obtained at 100 deg C with a 2.4D concentration corresponding to the solubility limit of the ion in water. This sample was further characterised by chemical analyses and scanning electron microscopy. The anion intercalation was effected without degradation of the pesticide anion.