Breakthrough Water Treatment Technology: Ozone Micro-Nano Bubbles Degrade 99% Methyl Orange Dye Wastewater in 6 Minutes​​

Revolutionary Water Treatment Technology: Ozone Micro-Nano Bubbles Degrade 99% Methyl Orange Dye Wastewater in 6 Minutes

Methyl orange (MO) dye, a complex, toxic, and persistent pollutant in printing and dyeing wastewater, has long posed challenges for industrial wastewater treatment. Traditional ozone oxidation methods suffer from limitations such as low mass transfer efficiency and limited free radical generation, hindering their effectiveness.

Our research team innovatively integrated ozone with micro-nano bubble technology to construct an advanced oxidation system (O₃-MNBs), achieving highly efficient and rapid degradation of methyl orange. Key findings include:

Significantly Enhanced Degradation Efficiency: The O₃-MNBs system achieved a 99% degradation rate of methyl orange within 6 minutes, far surpassing treatments using ozone or micro-nano bubbles alone

Optimal Process Parameters: Under conditions of pH=4.6, initial methyl orange concentration of 25 mg/L, and ozone flow rate of 1 L/min, the reaction rate was maximized, following pseudo-first-order kinetics

Clear Mechanism: The collapse of micro-nano bubbles instantly releases large quantities of hydroxyl radicals (·OH), drastically enhancing ozone’s oxidative capacity—this is identified as the key to efficient degradation

Free Radical Verification: Quenching experiments confirmed that ·OH serves as the primary active species in the degradation process, with superoxide radicals (·O₂⁻) also participating