K_2S_2O_8降解苯酚及反应动力学分析.pdfVIP

学兔兔 化 工 进 展 ·l154· CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 2012年第3 1卷第5刘 Fe(II)．EDTA／K2S2O8降解苯酚及反应动力学分析 周作明L ，周 琪 ( 同济大学环境科学与工程学院，上海 200092； 华侨大学化工学院，福建 厦门 361021) 摘 要：考察了Fe(II)-EDTA／K2S208体系降解苯酚的影响因素，并对体系中苯酚的降解机理和反应动力学进行 了初步分析。结果表明，铁离子、氧化剂形态以及紫外光辐照、螯合剂的存在对氧化体系作用效果影响显著。 EDTA剂量为0．5 mmol／L、Fe(II)剂量为1．0 mmol／L、K2S2O8剂量为2．0 mmol／L、溶液初始pH值为7．0、温度为 6O℃的条件下反应 60 min，浓度为 100 mgm 的苯酚降解率为71．48％，同样条件下紫外光辐照时降解率可达 89．38％。降解机理与动力学分析表明，苯酚在Fe(II)．EDTA／K2S2O8体系中降解途径以与Fe 络合降解为主。 关键词：乙二胺四乙酸二钠；Fe(II)；K2S2O8；反应动力学 中图分类号：X 703．1 文献标志码：A 文章编号：1000—6613(2012)05—1154—06 Mechanism and kinetics analysis of the phenol degradation by Fe(II)一EDTA／K2S2Os process ZHOUZuoming ～，ZHOUQi (1College ofEnvironmental Sciences and Engineering，Tongji University，Shanghai 200092，China College ofChemical Engineering，Huaqiao University，Xiamen 361021，Fujian，China) Abstract：The affecting factors on phenol removal by Fe(II)一EDTA／K2S208 process were studied，and the oxidation mechanism and reaction kinetics were analyzed．The results showed that the forms of iron ion and oxidant，the addition of chelant and ultraviolet have obviously effect on the oxidation of phenol When EDTA dosage was O．5 mmol／L，Fe(II)dosage was 1．0 mmol／L，K2$204 dosage was 2．0 mmol／L， and initial pH values was 7．0，the phenol(Co 1 00 mg／L)degradation rate reached 7 1．48％at 60℃ for 60 min by Fe(II)-EDTA／K2$208 process，under the same condition，ultraviolet radiation could increase the degradation rate to 89．38％．Mechanism and kineti