中文摘要：

为深入了解液相辉光放电等离子体降解水中有机污染物的机理,用发射光谱法检测放电过程中产生的自由基,用光度法检测溶液中生成的过氧化氢.结果表明,溶液在放电过程中产生了羟基自由基、氢原子和氧原子等活性粒子;在苯酚降解的同时,溶液中有大量过氧化氢产生.羟基自由基清除剂对苯酚的降解有抑制作用;铁盐的加入对苯酚的降解有明显的催化作用,且铁离子的催化效果优于亚铁离子.机理分析表明,羟基自由基是苯酚降解的主要活性物质,二羟基环己二烯自由基和降解中间产物苯二酚对铁离子的还原作用是铁离子催化效果优于亚铁离子的主要原因.

英文摘要：

In order to probe the phenol degradation mechanism in liquid-phase glow discharge plasma,the radicals,hydrogen peroxide formed in the solution were determined by emission spectroscopy and colorimetrical method,respectively.Experimental results show that hydroxyl radicals,hydrogen atoms and oxygen atoms are formed during the electrical discharges.Hydrogen peroxide is produced during phenol degradation.Iron salts are shown to have apparent catalytic action for phenol removal,where the catalytic effect of ferric ions is better than that of ferrous ions.It is shown that the reduction of ferric ion by dihydroxycyclohexadienyl radicals and the intermediate products dihydroxybenzenes are the main reason why the catalytic action of ferric ion is better than that of ferrous ion.