The kill of invasive marine species using advance oxidation iechnology

Abstract

Summary form only given. Strong ionization discharge method, the strong electric field (E/sub d//spl ges/ 400 Td, 1 Td=10/sup -17/ Vcm/sup 2/) is formed with the thinner /spl alpha/-Al/sub 2/O/sub 3/ dielectric layer in the micro-gap at a high pressure (P/spl ges/ 0.1Mpa or n=2.6/spl times/10/sup -19//cm/sup 3/). The electrons achieve the average energy of above 12 eV. As a result, O/sub 2/ in air and H/sub 2/O in seawater are ionized and dissociated into a number of activated particles such as OH, O/sub 2//sup +/, O(/sup 1/D), HO/sub 2/ radicals, and then dissolved into a part of seawater to form the dissolved hydroxyl radicals. The experimental results are as following: (1) OH radicals are dominantly produced from the positive ions O/sub 2//sup +/ reacting with H/sub 2/O to form the water cluster ions. (2) The duration to kill mono-cell algae, bacteria and protozoan are very fast only 2.67 s. (3) The lipid peroxide degree of cell is increased three times. The basic life substances, monose, amylose, protein, DNA and RNA of cell, are greatly destroyed. Also CAT, POD and SOD of antioxidant enzyme system are obviously destroyed. Biochemistry processes is the main reasons of organism cell death. In a word, the treatment of ship's ballast water using OH/spl middot/ radicals is a kind of advanced oxidation method, which realizes Atom Economy, Zero Emission and Zero Pollution in the process of the production of OH/spl middot/ radicals and the kill of organisms of ship's ballast water. Invasive marine species can be killed in ship in the process of the discharge or inputting ballast water.