UV/H2O2降解水中硝基酚及影响因素

UV H2 O2 氧化对硝基酚实验表明 ,H2 O2 光解产生·OH自由基是对硝基酚降解的直接原因 ,12min内 2 5mg L的对硝基酚去除率达到98%以上。溶液中TOC变化与对硝基酚的去除并不同步 ,说明对硝基酚的降解中生成了一系列的中间产物 ,然后再达到完全矿化的。体系中H2 O2 浓度变化显示产生的中间产物对H2 O2 光解没有明显影响。研究中还对对硝基酚起始质量浓度、H2 O2 浓度及pH影响进行了考察。研究认为UV H2 O2 是对硝基酚脱毒的一种有效方法

Degradation of Nitrophenol in Water by UV/H2O2 Process andInfluencing Factors

It was proved that the hydroxyl radical generated by the photolysis of hydrogen peroxide is the primary reason that caused p \|nitrophenol to degrade in UV/H 2O 2 process.Within 12 minutes the removal rate of p \|nitrophenol can reach 98% or higher.The difference between the change of TOC and the concentration of p \|nitrophenol indicates that during the degradation of p \|nitrophenol a series of intermediates occurred at first stage and then complete mineralization was reached.The change of the concentration of hydrogen peroxide reveals that the intermediates have little effect on the photolysis of hydrogen peroxide.This study also investigated the influences of initial concentration of p \|nitrophenol,hydrogen peroxide and the pH on the degradation of p \|nitrophenol.In short,UV/H 2O 2 process is an efficient method to remove p \|nitrophenol in aqueous soluiton.