· 3116·
研究开发
展
化工进
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2017年第36卷第8期
蛋白土-Fe-O非均相Fenton催化剂高效降解罗丹明B染料废水
王炫，李焕焕，张乾，陈俊涛
（河南理工大学化学化工学院，河南焦作454000）
摘要：采用共况淀法将Fe,O，负载于蛋白土表面，制备出一种新型、高效的非均相光-Fenton催化剂，并将其用于降解罗丹明B染料废水，取得显著效果。利用N2吸附、X射线衍射(XRD)、扫描电子显微镜（SEM)、能谱分析仪（EDS)、傅里叶红外光谱（FTIR）等方法对复合材料的结构进行了表征。考察了废水中COD去除率及影响降解效果的因素，包括溶液pH、反应温度、催化剂投加量、H,O,投加量以及罗丹明B的初始浓度等。试验结果显示，在可见光照射下、pH=2.5、反应温度30℃C、催化剂投加量0.15g/L、HO2投加量9.0mmol/L、罗丹明 B初始浓度40mg/L的条件下碳力搅拌120min，罗丹明B溶液脱色率达到96.49%，COD去除率达到50.51%。对反应过程进行了一级动力学方程拟合，在最佳反应条件下R=0.98，说明该反应过程属于一级动力学反应。催化剂循环使用5次后，对罗丹明B的脱色率仍能达到85%以上，证明该催化剂其有良好的循环性能。最后，对反应过程进行了分析，提出了一种可能的反应机理。
关键词：蛋白土：降解：非均相Fenton：催化剂：废水
中图分类号：X703
文献标志码：A
DOI: 10.16085/j.issn.1000-6613.2017-0109
文章编号：1000-6613（2017）083116-09
Researchonopal-FeOgasaheterogeneousFentoncatalystfordegrading
theRhodamineBdyewastewater
WANGXuan,LIHuanhuan,ZHANGQian,CHENJuntao
(Chemistry and Chemical Engineering School, Henan Polytechnic University, Jiaozuo 454000, Henan, China) Abstract:A novel and efficient heterogeneous photo-Fenton catalyst has been successfully prepared using co-precipitation method, in which the FezOs particles were loaded onto the surface of opal. The catalyst was then used to degrade the Rhodamine B(RhB). The structural characterization of catalyst was analyzed by N2adsorption,X-ray diffraction (XRD)，scanning electron microscopy (SEM)，energy dispersive spectrometry (EDS),Fourier transform infrared spectroscopy (FTIR).The COD (chemical oxygen demand) removal and the influencing factors of degradation effect were analyzed, such as pH, temperature, catalyst dosage, HzO2 dosage and initial dye concentration. The results showed that the decolorization rate of RhB and COD removal were 96.49% and 50.51% respectively under agitation after 120min treatment with pH of 2.5, reaction temperature 30C, dosage of catalyst 0.15g/L, dosage of H2O2 9.Ommol/L and initial concentration of RhB 40.Omg/L. The first-order kinetic equation was fitted to the reaction process, and R0.98 under the optimal condition, which indicated that the reaction process obeys the first-order kinetic equation. The decolorization rate of RhB was still higher than 85% when the catalyst used for 5 times, which proved that the catalyst has a good reusability. Finally, the reaction process was analyzed and a possible photocatalytic mec hanismwas proposed.
Key words:opal;degradation;heterogeneous fenton;catalystwaste water
收稿日期：2017-01-17；修改稿日期：2017-04-11，
基金项目：国家自然科学基金（51304074，U1361119）及河南理工大学博士基金（B2013-011）项目
第一作者：王炫（1992一），男，硕士研究生，研究方向为矿物材料万方数据
深加工及矿产资源综合利用。E-mail：wangxuan0505@163.com。联系人：陈俊海，副教授，博士后，主要研究方向为矿物材料深加工技术及应用，E-mail;Juntaochen@hpu.edu.cn.