Study On Managing The Invasive Spread Of Oceanic Organism By Advanced Oxidation Technology

Invasive aquatic species are one of the four greatest threats to the world's oceans. If they were introduced to the colonies, can impact extremely on environmental, economic and public health and residential health. Ballast water discharges lead to marine invasion between geographically isolated water, and are the main approach to spreading harmful microorganism. It's a hot topic that how to treat ballast water by security and feasible method.Based on the key NSFC project (No. 60031001), NKBRSF project (No. 2002CCC00900), we use the hydroxyl kill the oceanic microorganisms, and have some research on the advanced oxidation technology mechanism, killing Nitzschia closterium and bacteria . Following as a result:1. Advance Oxidation Technology is renovate and develop for thinking of tradition chemistry. Advanced Oxidation Technologies(AOTs) have the advantages of avoiding the generation of pollutants, reducing the use of hazardous, toxic and environment-unfriendly materials, solvent and catalyst, and minimizing the production of wastes and byproduct from the headstream, therefore, Zero Pollution to the environment is realized.2. Hydroxyl radical has the advantages of strong oxidation, rapidly reaction, strong killing effect on oceanic microorganisms, and no second pollution for oceanic environment. It is consist with the standards of treating ballast water, and is the research direction.3. Hydroxide radical medicament kill all bacteria of 10~5 by 0.75mg/L. Hydroxide radical medicament takes an apparent effect on killing the unicellular life-span;Broken up degree in cell along with the aggrandizement of the Hydroxide radical a density but enlarge of;Under the lower circumstance in concentration (about 0.4mg/L) hydroxide radical medicament only oxidize the materials outside the cell membrane, while increasing to a specific level (0.6 mg/ L or so) cell membrane was oxidized broken, the Hydroxide radical oxidizes the material inside the cell membrane continuously at this time and make its leak, finally kill completely thecell of algae. Which agrees on the related index from the killing experiments that we did based on the micro view.