Factors affecting phenol adsorption on clay-solidified grouting curtain

Abstract

Batch experiments were conducted to study the adsorption of phenol on clay-solidified grouting curtain (CSGC) and the effects of contact time, pH and adsorbent concentration on the adsorption were investigated. Under the experimental conditions used, 2 d was adequate to determine the equilibrium of phenol adsorption onto CSGC. The amount of phenol adsorbed by CSGC from an initial concentration of 100 mg/L was found to be 8.4 mg/g. The adsorption process includes particle diffusion and liquid film diffusion, and the latter is the predominating step of the adsorption process. The adsorption ability of CSGC decreased with pH but it increased non-linearly with the CSGC concentration. The optimized concentration for CSGC was found to be 20 g/L for the adsorption of 100 mg/L phenol.

Keywords

clay-solidified grouting curtain / adsorption; phenol / effective factors