壳聚糖/纳米TiO_2超声降解甲基橙废水  

Study on the Sonochemical Degradation of Methyl Orange Wastewater Through Chitosan-Nano-TiO_2 Composite Flocculants

作　　者：吴新华[1] 石慧[1] 阳小宇[1] 

机构地区：[1]湖南化工职业技术学院,湖南株洲412004

出　　处：《绿色科技》2015年第6期173-175,共3页Journal of Green Science and Technology

基　　金：湖南省科技厅项目(编号:2012SK3180);湖南化工职业技术学院院级课题(编号:Hnhy2012B014)资助

摘　　要：将壳聚糖(CHS)和改性后纳米TiO2同步复合,制备得到一种新型复合材料。评估了此复合材料超声催化降解甲基橙模拟废水的性能,探讨了废水pH值、纳米TiO2/CHS不同配比、复合膜投入量,时间对脱色率、降解率及其化学耗氧量(COD)的影响,试验结果表明:室温处理50mL0.02g/L的甲基橙溶液最佳条件为:当复合膜投入量为2.0g,吸附剂的配比为1∶6,废水pH为5,时间为60min时,其COD去除率和降解率分别高达93%和99%。In this article, a new composite material is prepared by using the chitosan （CHS） and modified nano-TiO2. The article evaluates this ultrasonic and catalytic degradation of methyl orange simulated wastewater and discusses on effect of pH value of the wastewater, different proportions of nano-TiO2/CHS, the dosage of the composite material and the time on the color removal rate, degradation rate and chemical oxygen demand （COD）. The results indicate that the optimal condition for the degradation of 0.02g/1 methyl orange solution of 50ml at the indoor temperature is that the COD removal rates and degradation rates are as high as 93 % and 99 % when the dosage of composite material is 2.0g, ratio of adsorbent is 1 ： 6, the pH value is 5 and the degradation time is 60min.

关 键 词：纳米TIO2 壳聚糖 甲基橙 

分 类 号：X703[环境科学与工程—环境工程]