The Kinetics on the Removal of 2,4-Dichlorophenol Aqueous Solution by the Extraction-Ozonization Process

摘要

An innovative Extraction-Ozonization process was developed and studied for degradation of phenolic pollution in water. It basically includes the following features: (1) Designing an extraction unit for contacting of phenolic wastewater and highly ozone soluble fluorinated solvent(FC77) in order to remove the pollutants from aqueous to solvent phase, aiming to reduce the pollutants in water; (2) Designing an ozonization unit in connection with the extraction unit where the organic pollutants are oxidized and decomposed in the solvent, while recovering the extraction capability of the solvent for reusing; (3) Designing a solvent circulating system for repeated extraction and ozonization of the phenolic pollutants. In this paper, the kinetic models of the extraction-ozonization process were developed by using three equations to describe and predict the variation of 2, 4-dichlorophenol (2, 4-DCP) in each unit. Considering the models, we could then make forecasts of impacts of significant factors on the removal efficiency of 2,4-dichlorophenol in this process with access to the best operation conditions.