Removal of tetrabromobisphenol-A from wastewater by ozonation

The tetrabromobisphenol-A (TBBPA)-bearing wastewater contains high concentration of salt and TBBPA, which is difficult to be treated by conventional biological methods because of its high toxicity and refractory to microorganisms. Therefore, the Ozonation technology has been selected to remove TBBPA from this wastewater. In this paper, the effect factors of pH, ozone dosage, reaction time, and salt concentration were investigated. The results indicate that under the conditions of TBBPA = 50mg l(-1), pH= 9.0, ozone dosage = 52.3 mg h(-1), and reaction time = 25 min, TBBPA can be efficiently decomposed by ozone oxidation, and the TBBPA removal has come to 99.3%. The content of salt in wastewater has low effect on the performance of ozone oxidation. However, suitable addition of salt concentration was benefit to the development of reaction.