Method for treating water through Fenton oxidation of activated molecular oxygen by utilizing ultrasonic catalysis

Abstract

The invention relates to a method for treating water through Fenton oxidation of activated molecular oxygen by utilizing ultrasonic catalysis. The method comprises the following specific steps: (1) adding activated carbon powder into waste water, wherein the addition amount of the activated carbon powder is 0.7 weight percent of the weight of the waste water; (2) after the activated carbon powder adsorbs impurities, filtering the waste water, and then injecting the waste water into an ultrasonic reactor; (3) performing ultrasonic crushing reaction, wherein the sound energy density of an ultrasonic wave is 0.2 w / m<3>; (4) after the reaction is performed for 30 minutes, adding transition metal ions, transition metal or a transition metal oxide catalyst into the ultrasonic reactor, introducing air or oxygen, catalyzing the activated molecular oxygen at room temperature to generate a hydroxyl free radical, adjusting the PH value to be 4, and performing stirring; (5) after the stirring is performed for 2 hours, performing sedimentation and solid-liquid separation after the reaction is completed so as to treat the waste water. Sewage is purified by adding the transition metal ions, the transition metal or the transition metal oxide catalyst into the Fenton oxidation under an ultrasonic environment. The method has the advantages of wide oxygen source, low cost, high economy and high reaction rate.

Description

technical field [0001] The invention relates to a method for removing organic matter in water through Fenton oxidation of activated molecular oxygen, in particular to a method for removing organic matter in water through Fenton oxidation of activated molecular oxygen catalyzed by ultrasonic waves. Background technique [0002] In the treatment of water resources and environment, wastewater can be treated by ultrasonic waves. The cavitation effect of ultrasonic waves provides the possibility of degrading harmful organic substances in water, so that the purpose of ultrasonic sewage treatment can be realized. In the process of sewage treatment, ultrasonic cavitation has a strong ability to degrade organic matter, and the degradation speed is very fast. The high energy generated by the collapse of ultrasonic cavitation bubbles is enough to break chemical bonds, and the collapse of cavitation bubbles produces hydroxyl groups ( Oh + ) and hydrogen radicals (H - ), and the oxidat...

AI Technical Summary

Problems solved by technology

However, the current Fenton system still does not solve the shortcomings of H2O2 expensive and low utilization

[0004] Existing technologies such as: Application No.: 201310678092.4 and 201210286680.9 respectively provide methods for ultrasonic and Fenton reaction synergistic treatment of wastewater, the Fenton reaction is proposed in the 201310678092.4 The reaction is carried out simultaneously with the ultrasonic crushing reaction. The method proposed in the 201210286680.9 is to first add FeCl2 and H2O2 to carry out the Oxidation followed by ultrasonic crushing reaction, but the above two technologies did not make full use of the large amount of hydroxyl groups (OH+) and hydrogen produced in the wastewater after ultrasonic crushing for a period of time Promotion of Fenton Oxidation Technology by Groups (H-)