新型Fenton试剂氧化降解有机物

Oxidative Degradation of Organic Compounds with a New Fenton Reagent

在酸性条件下用NaC lO或Ca(C lO)2生成HC lO,利用HC lO代替H2O2进行Fenton反应有效地降解了废水中的有机物。当pH=1.7、反应4 h时,β-萘酚、R盐、二羟基R盐、酸性红、实际废水的化学需氧量(COD)去除率分别可达40%、38%、12%、50%和73%;对比实验显示,反应时间为1 h时,β-萘酚和R盐的COD去除率分别为10.2%和16.2%,而用H2O2则分别为23.4%和18.1%。辅以光照,相应的COD去除率则分别为35.0%和23.1%、29.8%和21.3%。结果说明,用HC lO代替H2O2进行Fenton反应是可行的。

HClO was produced from NaClO or Ca（ClO） 2 u.nder acidic condition, and organic compounds in wastewater were degraded via Fenton reaction with HClO instead of H2 O2. Experimental results indicate that the reduction of chemical oxygen demand （COD） were 40% , 38% , 12%, 50% , and 73% for β-naphthol, salt R （a intermediate of dye）, dihydroxy salt R, acid red（ dye）, and wastewater, respectively when the reactions had run for 4 h at a pH of 1.7. In comparison, the COD reduction of β-naphthol and salt R were 10. 2% and 16. 2%, lower than 23.4% and 18.1% with H202, while the Fenton reaction time was 1 h. However, under UV light, the corresponding COD reduction rates were 35.0% and 23.1% with HClO vs 29.8% and 2l. 3% with H2O2. These results show that it is feasible to use HClO instead of H2O2 in Fenton reaction.