Treatment of Phenol-Contaminated Soil by Potassium Ferrate Based on pH Control

摘要

This study aims to optimize the treatment of phenol-contaminated soil by potassium ferrate. Variations in pH value can accurately reflect the state and reaction status of the entire treatment process. Therefore, the pH value could be an important variable for optimizing the reaction conditions and achieving the automatic control of the process. About 99.89% of phenol was removed after 10 min of the pH-controlled reaction at a rotational speed of 40―70 r/min, with the initial phenol concentration equating to 10.0 g/kg and the total water consumption reaching 2.72 L(at a soil/water ratio of 1:0.68). The test results could provide a basis for practical application of automatic reaction control by pH value.