Fe-Mn负载凹凸棒催化剂的制备及协同臭氧化处理甲基橙模拟废水的应用

发布时间：2018-06-14 13:22

本文选题：凹凸棒 + 甲基橙　；参考：《高校化学工程学报》2017年05期

【摘要】：天然凹凸棒土(PG)较传统活性炭及其他稀土等载体价格低廉,在环保领域极具开发潜力。今以PG作为催化剂载体的原料,经提纯后,其比表面积、孔容和孔径分别比天然PG增加了74.1%、204%和74.3%;再以2 mol×L~(-1)硝酸溶液改性,分别再增加了24.5%、23.4%和11.1%。采用凝胶法负载Fe~(3+)、Mn~(2+)双活性组分后得到催化剂,协同臭氧,用于甲基橙模拟废水处理,色度去除率达99.96%,化学需氧量(COD)去除率达92.47%。动力学实验表明改性Fe-Mn负载PG协同臭氧对甲基橙模拟废水的降解符合一级动力学反应模型,自由基掩蔽实验表明该氧化过程遵循自由基氧化机理。Fe-Mn负载PG联合臭氧氧化技术能有效去除印染废水的色度和COD。
[Abstract]:Natural attapulgite PGs are cheaper than traditional activated carbon and other rare earth carriers, and have great potential in the field of environmental protection. After purification, the specific surface area, pore volume and pore diameter of PG as catalyst carrier were increased by 74.1% and 74.3%, respectively, and then modified with 2 mol 脳 L ~ (-1) nitric acid solution, with a further increase of 23.4% and 11.1%, respectively. In this paper, the catalyst was obtained by gel-loading of Fean3 / Mn-Mn-Pu _ 2). The catalyst was used in methyl orange wastewater treatment with synergistic ozone. The chromaticity removal rate and COD removal rate were 99.96 and 92.47, respectively. The kinetic experiments showed that the degradation of methyl orange wastewater by modified Fe-Mn supported PG and ozone was in accordance with the first-order kinetic reaction model. The experiment of free radical masking shows that the oxidation process follows the mechanism of free radical oxidation. Fe-Mn supported PG combined with ozone oxidation can effectively remove chroma and COD of printing and dyeing wastewater.
【作者单位】：浙江工业大学环境学院;浙江工业大学化学工程学院;
【基金】：国家自然科学基金(41273129,41373122)
【分类号】：TQ426;X703

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