An experimental study on the simultaneous removal of NO and SO2 with a new wet recycling process based on the micro-nano bubble water system

The micronano bubble water system (MNBW) generated by a micronano bubble generator (MNBG) has the superior oxidation properties and can improve gas solubility. In the study, a new wet recycling process based on MNBW is proposed to simultaneously remove nitric oxide (NO) and sulfur dioxide (SO 2 ). The important experimental parameters such as initial water pH, initial water temperature, NO and SO 2 concentrations, and the presence of oxygen (O 2 ) were investigated to explore the feasibility of desulfurization and denitration with MNBW. The experimental results showed that decreasing initial water pH or increasing initial water temperature and NO and SO 2 concentrations were not conducive to the removal of NO or SO 2 . O 2 could promote the removal of NO, but it had no effect on SO 2 removal. In addition, SO 2 removal efficiency always remained high and did not change obviously during the experimental period. However, NO removal efficiency gradually decreased in the first 50 min and then became stable.