铁柱撑蒙脱石可见光催化降解活性艳橙性能及动力学研究  

STUDY ON THE PERFORMANCE AND KINETICS OF PHOTOCATALYTIC DEGRADATION OF REACTIVE BRILLIANT ORANGE USING IRON PILLARED MONTMORILLONITE UNDER VISIBLE LIGHT IRRADIATION

作　　者：陈秋强[1] 吴平霄[1] 李涛[1] 李媛媛[1] 邢宁[1] 

机构地区：[1]华南理工大学环境科学与工程学院

出　　处：《矿物岩石》2009年第2期25-30,共6页Mineralogy and Petrology

基　　金：国家自然科学基金项目(40573064);教育部新世纪优秀人才支持计划(NCET-06-0747);广东省科技计划项目(2008B030302036)

摘　　要：采用铁柱撑蒙脱石（Fe-Mt）作为光催化剂，与H2O2在可见光条件下形成异相photo—Fenton（异相光芬顿）试剂对活性艳橙（X—GN）进行降解实验，研究不同反应体系对X—GN的降解情况，以及X—GN浓度、PH值、催化剂用量、H2O2浓度、反应温度等不同因素对X—GN光解过程的影响。结果表明：可见光照射下，在反应温度为30℃，pH为3．0，H2O2浓度为4．9mmol／L，Fe—Mt用量为0．6g／L，Fe-Mt／H2O2的可见光体系下，降解X—GN效果最好，140min后X—GN的降解率为98．5％；在此基础上进行的动力学研究则表明反应接近于表观一级反应。Decolorization of reactive brilliant orange （named as X-GN） was investigated under visible irradiation （λ〉 420 nm） by using Fe-Mt / H2O2 as the heterogeneous photo-Fenton reagent and degradation of X-GN in different reaction systems was discussed,and the influences of reaction conditions,such as X-GN concentration, solution pH, catalyst dosage and reaction temperature were also evaluated. The results showed that under the conditions of reaction temperature at 30 ℃ ,pH value at 3.0,4.9 mmol/L H2O2 and 0.6 g/L catalyst within 140 min treatment, 98. 5% discoloration was obtained. Furthermore,it was experimentally found that photocatalytic degradation of X-GN was close to one order kinetic reaction.

关 键 词：铁柱撑蒙脱石 异相photo-Fenton 活性艳橙(X-GN) 动力学 

分 类 号：P579[天文地球—矿物学]