%0 Journal Article
%T Degradation effect and mechanism of 2,4-DNT by reduction-ZPF catalytic oxidation<br>还原-ZPF催化氧化降解2,4-DNT效果及其机制
%A Zhang Jin-Bao
%A Xi Bei-Dou
%A Jiang Yong-Hai
%A Li Ding-Long
%A Deng Fei
%A Ma Zhi-Fei
%A Wang Yan-Fei
%A <br>张进保
%A 席北斗
%A 姜永海
%A 李定龙
%A 邓飞
%A 马志飞
%A 王燕飞
%J 环境科学
%D 2011
%I 
%X ZPF(zeoliteartificial pillared by alpha-FeOOH) which prepared in the laboratory and characterized by FTIR and XRD was used as catalyst, and was tested for its activity in catalytic H2O2, of 2,4-DNT, which is persistent and difficult to be degraded in groundwater. The degradation of 2,4-DNT was examined at different pHs in the reduction, catalytic oxidation and combination technology of reduction-catalytic oxidation reaction systems. Moreover, the removal effect of 2,4-DNT was compared by these three approaches and the catalytic oxidation mechanism was analyzed. The results demonstrated that the removal effect of 2,4-DNT reduced to 2,4-DAT was up to 96.6% in 120 min at pH = 5, which was 1.2, 2.0 times of the rate at pH 7, pH 9 respectively. The catalytic effect was various at different pHs and more significant when the pH close to the zero point of charge of alpha-FeOOH. The order of removal effect of 2,4-DNT at different pHs was pH = 7 > pH = 9 > pH = 5. Compared to single reduction or catalytic oxidation, the removal effect of combination technology was 57.4%, which was evidently improved on the base of 2,4-DNT reduced to 2,4-DAT. The degradation of 2,4-DNT in the presence of ZPF/H2O2 follows a first-order kinetic model and the k(obs) was 0.002 7 min(-1). Due to the concentration of dissolved Fe ion was far less than 0.07 mmol/L, the mechanism was heterogeneous Fenton reaction acting on the surface of the catalyst. Therefore the combination technology was superior to the single treatment of reduction or catalytic oxidation.
%K nitro aromatic compounds
%K zeotileartificial pillared by α-FeOOH
%K pH value
%K remediation of groundwater
%K 2
%K 4-dinitrotoluene
%K reduction-ZPF catalytic oxidation<br>硝基苯类化合物
%K α-FeOOH柱撑人造沸石
%K pH值
%K 地下水修复
%K 2
%K 4-二硝基甲苯
%K 还原-ZPF催化氧化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=D1920AB56F28E37C6DFEF2D6DD43C4C3&yid=9377ED8094509821&vid=9971A5E270697F23&iid=F3090AE9B60B7ED1&sid=2CD0DCA22C808B7D&eid=A2937CE34F7AE4F4&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=33