摘要
本文研究了在弱酸性介质中,EDTA、Vc对H2O2-Fe3+-o-AP反应体系的影响,实验结果表明,在H2O2-Fe3+-o-AP反应体系中加入EDTA,由于EDTA对Fe3+的络合作用,使Fe3+的催化作用减弱,催化反应速度明显降低;加入Vc,由于Vc的还原作用,使Fe3+还原为Fe2+,Fe2+与H2O2发生Fenton反应,产生羟自由基,使催化反应速度明显增加.
In the paper, the effect of EDTA and ascorbic acid on the mechanism o f H2O2-Fe3+-o-AP system in acidic mediums is studied. The results illustrate that, after adding EDTA into the system of H2O2-Fe3+-o-AP, the catalysis of iron (Ⅲ) will become weak for EDTA coordinate with iron(Ⅲ), so the speed of t he catalyst reaction decreased obviously. When ascorbic acid is added, the iron( Ⅲ) was reduced by ascorbic acid to form iron(Ⅱ), and iron(Ⅱ) reacts with hydr ogen peroxide to produce hydroxyl radicals. It makes the catalytic reaction spee d enhanced quickly.
出处
《淮北煤师院学报（自然科学版）》
2003年第2期21-24,共4页
Journal of Huaibei Teachers College(Natural Sciences Edition)
基金
安徽省高校自然科学基金资助课题(99JL0180
2001KJ196)
