Effect of copper on the adsorption of p-nitrophenol onto soils

摘要

The effect of copper on adsorption of p-nitrophenol on two typical Chinese soils was investigated using a batch-equilibration method. Adsorption experiments were carried out when both copper and p-nitrophenol were adsorbed Simultaneously, and when copper was previously adsorbed oil soils. It was observed that adsorption of p-nitrophenol decreased with increasing copper concentrations thereby indicating a competition between copper and p-nitrophenol for occupying the adsorption sites oil soils. Moisture increased the hydrated sphere and the acidity of Water Surrounding the cation, which further reduced the adsorption of p-nitrophenol. Fourier transform infrared Spectroscopy study provided the direct evidence for the coordination of p-nitrophenol sorbed by soils with metal cation in n-hexane system. It was observed that the perturbations included a red shift of the v(sym) (NO) hand, a concomitant blue-shift of the v(sym) (NO) hand and a blue-shift of C-N hand when compared with the infrared spectra obtained from water solution. (c) 2005 Elsevier Ltd. All rights reserved.