%0 Journal Article
%T Degradation of malachite green in aqueous solution by Fe3+/H2O2 catalyzed with EDTA<br>EDTA催化Fe3+/H2O2降解水中孔雀石绿
%A LI Chun-juan
%A MA Jun
%A YU Min
%A ZHANG Ying-jie
%A <br>李春娟
%A 马军
%A 余敏
%A 张瑛洁
%J 环境科学
%D 2008
%I 
%X This study found that the discolorization of Malachite green solutions (0.01mmol/L) was improved by Fe3+/H2O2 catalyzed with EDTA, at pH 7. Oxidation is carried out in presence of various hydrogen peroxide concentrations, in a wide range of temperature and EDTA concentration. It was found that oxidation with EDTA promoted the discolorization of MG from 43% to 98.3% as compared with the cases without EDTA. In this study, the discolorization of MG increased by 40% with the increase of EDTA concentration by 5 fold. The H2O2 concentration and temperature are higher, the discolorization of MG better. t-BuOH inhibited the improvement from EDTA. With the same total dosage of applied H2O2, the multiple steps addition did not show a much higher removal efficiency than that obtained by one step. OH free radical or an iron-oxo species may be the highly reactive oxidizing species, the latter may be the major oxidant. With the time, EDTA was a little oxidized.
%K EDTA
%K 催化
%K 类芬顿体系
%K 孔雀石绿
%K 降解
%K 中间价态铁
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=7FABBA3E7BE30A18176DE65CAF898692&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=94C357A881DFC066&sid=EB4DE9DC132993F4&eid=DC165160277F7BE9&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=27