Hydrodynamic cavitation (HC) degradation of tetracycline hydrochloride (TC)

The degradation of organic pollutants by hydrodynamic cavitation (HC) has become a potential research direction. HC reactor has the advantages of simple structure, easy operation, and low maintenance costs. The combination of HC and other advanced oxidation processes (AOPs) can greatly improve the degradation rate and energy efficiency, reduce the consumption of chemicals and save cost. HC technology was used to degrade tetracycline hydrochloride (TC), the effects of reactor type, geometric parameters, and operation conditions on the degradation were investigated. The results indicated that under the optimal inlet pressure of each reactor, the degradation performance of OP3 was the best, and the degradation rate was 44.9%. After combined HC reaction with 0.10 g/L Na2S2O8 for 2 h, the degradation rate was 92.2%. The synergistic index of HC + 0.050 g/L and HC + 0.10 g/L Na2S2O8 was 1.56 and 4.41, respectively. The synergistic index of HC + 0.047 g/L O-3 process was 1.60, and the degradation rate reached 95.5% after 80 min. The degradation intermediates were analyzed by UV-Vis absorption spectrum and LC-MS, and the degradation pathway and mechanism were proposed.

Automated summary

The degradation of organic pollutants using hydrodynamic cavitation (HC) has advantages of simple structure, easy operation, and low maintenance costs. Combining HC with other advanced oxidation processes (AOPs) can significantly improve degradation efficiency, reduce chemical consumption, and save costs. Optimization of reactor type, parameters, and operational conditions can enhance the degradation performance of organic pollutants.