The aim of this study is to evaluate the adsorption performances of sewage sludge based adsorbent SSBA for the removal of phenol from water. The SSBA was prepared by chemical activation with H_2SO_4 in a mass ratio of 1:1, followed by a pyrolysis at 650°C for 1 h under inert atmosphere. Phenol removal by SSBA was investigated using kinetic and equilibrium experiments. The results demonstrate that phenol sorption to the SSBA reached equilibrium at 2 h with the maximum sorption capacity of 26.16 mg.g~(-1) under given experimental conditions (initial Phenol concentration range = 40-200 mg.l~(-1); adsorbent dose = 5.0 g.l~(-1) and temperature = 20°C). The phenol removal was high and relatively constant at (pH＜pKa), whereas the phenol removal decreased sharply as the solution pH approached a highly alkaline condition (pH＞pKa).The results indicate that the pseudo second order model was suitable for describing the kinetic data. Regarding the equilibrium data, the Freundlich isotherm was fitted well. This study demonstrates that SSBA could be used for phenol removal from water.
展开▼
