The Investigation Of The PH Effect On The ·OH Production By The Cooperation Of Strong-field Ionization Discharge And Effective Interfusion

The introduction of invasive marine species into new environments by ships' ballast water has been identified by the GEF as one of the four greatest threats to the world's oceans. For strong-field ionization discharge is able to produce hydroxyl radicals (OH) which could oxidate various organic and inorganic matters becase of it's strong oxidation, strong-field ionization discharge would become perfect method of ballast water treatment.The consumption of -OH is too fast, because of its strong oxidation and halflife within10μs. In order to have stabile efficiency of ballast water treatment, the yeild of -OH must be improved. There is also ozone produced by strong-field ionization discharge, for the sake of transforming O₃ to -OH effectively, and based on the key NSFC Project (No.60371035) this paper study the effect of the pH value on the OH yeild in the ballast water treatment and the efficiency of treatment by strong-field ionization discharge, trying to find a method which could improve the -OH yeild.Using the method of -OH-probe to study the effect of pH value on the -OH yeild in deionized water and seawater, the improvement of pH value could increase the OH yeild and gained the dependence relation between OH and the concentration of OH^-.Taking P.subcorodiformis and Nitzschia dosterum as objects, we study the effect of the pH value on the ballast water treatment, and the conclusions is the pH could improve the inactivation of these two kinds of alga and with the increasement of pH the OD value is getting lesser and the elimination of Cha. is greater.Although the increasement of pH is able to improve the OH yeild, it need to be prudent to use this method because of the negative side of puting alkalies into the ballast water. Thereby we should search other green initiator and promoter which much more...