羟基化合物对Fenton反应选择性的影响研究

EFFECT OF COMPOUNDS WITH HYDROXYL ON FENTON REAGENT SELECTION

Fenton法处理含有羟基有机化合物的废水时存在明显的选择性。羟基取代基类型、羟基数量、羟基取代位置、主链链长及主链的饱和度对Fenton法处理效果均存在不同程度的影响。试验结果表明,一元酚羟基对Fenton反应有促进作用,而一元醇羟基对其有强烈的抑制作用;当碳原子数相同而羟基数不同时,随羟基数量的增加其对Fenton反应的影响逐渐下降;饱和一元醇主链碳原子个数越多,则其对Fenton反应的抑制作用越明显;主链的不饱和度对Fenton反应的影响也是不同的,脂肪族不饱和羟基化合物的Fenton法处理效果很差,而对苯环类羟基化合物有着很好的氧化处理效果;链长与醇羟基个数都不同时,随主链的增长和羟基数量的增加,其对Fenton反应的抑制作用随之下降,表现出良好的氧化降解效果。

Fenton reagent was selective to the organic compounds with different kinds of hydroxyl such as the hydroxyl type, hydroxyl quantity, the hydroxyl position, the length of the chain and the chain＇s saturation. The experimental results indicated that the monohydric phenol hydroxyl can promote the Fenton reaction, but the monohydroxyl-alcohol hydroxyl suppress it fiercely; when the hydroxyl compounds had the same carbon but the hydroxyl quantity, their effects wound decreased as the hydroxyl quantity increasing; to the saturated monohydroxyl-alcohol, the suppression became more and more obviously while the carbons of the chain were increasing; the effects of the chain＇s instauration on Fenton reaction were different ： the oxidized effects were very well for the hydroxyl compounds with the phenyl but the acyclic unsaturated compounds; when the length of the chain and the hydroxyl quantity were increasing, the suppression descended and the oxidized effects were well.