Cu-Mn/Fe_3O_4@SiO_2@KCC纳米催化剂制备及其催化臭氧化降解对苯二甲酸性能  

Preparation of Cu-Mn/Fe_3O_4@SiO_2@KCC Nanocatalyst and Its Application in Catalytic Ozonation for Degradation of Terephthalic Acid

作　　者：牛建瑞[1,2] 李文亚 李宗泽[1,2] 刘艳芳 孙雪聪[1] 谢欢欢 李再兴[1,2] 

机构地区：[1]河北科技大学环境科学与工程学院 [2]河北省污染防治生物技术实验室,石家庄050018

出　　处：《科学技术与工程》2018年第6期354-360,共7页Science Technology and Engineering

基　　金：河北省高等学校科学技术研究项目(QN2016163;ZD2015060);河北省自然科学基金(E2016208116)资助

摘　　要：采用微乳法及浸渍法合成负载型铜锰单分散核壳磁性纤维状纳米催化剂(Cu-Mn/Fe_3O_4@SiO_2@KCC),利用XRD、TEM、BET、VSM等手段对其表征;并通过构建类均相催化臭氧化降解对苯二甲酸(100 mg·L^(-1))的研究,考察其催化性能。结果表明:臭氧通入量13.92 mg·min^(-1)、催化剂投加量40 mg·L^(-1)和pH=9时,对苯二甲酸去除率高达90.97%,TOC去除率可达30%。五次循环试验后对苯二甲酸降解率仍稳定在88.23%。Through a surfactant-templated microemulsion formation process and impregnation method,supported copper and manganese fibrous monodisperse core-shell structured Cu-Mn/Fe_3O_4@SiO_2@ KCC nanocatalyst were synthesised,and characterized by XRD,TEM,BET and VSM. In order to investigate the catalytic properties,homogeneous-like phase catalytic ozonation system has been established and further treatment of terephthalic acid simulated wastewater( 100 mg·L^(-1)). The results showed that the terephthalic acid removal rate can up to 90. 97% and TOC removal rate can up to 30% under optimum conditions( ozone dosage is 13. 92 mg·min^(-1); catalyst dosage is40 mg·L^(-1),pH = 9). It was also verified that the activity of the catalyst remained stable about 88. 23% after 5 times of recycle.

关 键 词：催化臭氧氧化 Cu-Mn/Fe3O4@SiO2@KCC 纳米催化剂 类均相体系 对苯二甲酸 

分 类 号：X74[环境科学与工程—环境工程]