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现代化工  2019, Vol. 39 Issue (4): 71-74,76    DOI: 10.16606/j.cnki.issn0253-4320.2019.04.016
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
河底泥陶粒负载Sn-Sb-TiO2电极处理2,4-二硝基甲苯废水
吴勇1,2, 鲍扬1,2, 朱兆连1,2, 仲维啸1,2, 王海玲1,2
1. 南京工业大学环境科学与工程学院, 江苏 南京 211800;
2. 江苏省工业节水减排重点实验室, 江苏 南京 211800
Treatment of simulated 2,4-dinitrotoluene wastewater with river sediment ceramsite loaded Sn-Sb-TiO2 electrode
WU Yong1,2, BAO Yang1,2, ZHU Zhao-lian1,2, ZHONG Wei-xiao1,2, WANG Hai-ling1,2
1. School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China;
2. Jiangsu Key Laboratory of Industrial Water-conservation and Emission Reduction, Nanjing 211800, China
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摘要 采用溶胶-凝胶法制备了河底泥陶粒负载Sn-Sb-TiO2电极,并通过SEM和XRD对其进行表征,考察了该电极对2,4-二硝基甲苯模拟废水的电催化降解性能,初步探讨了还原产物和还原机理。结果表明,制备的电极表面有较致密的Sn-Sb-TiO2金属氧化物表层,对2,4-二硝基甲苯模拟废水有很好的电催化处理效果。当2,4-二硝基甲苯初始质量浓度为100 mg/L、电解质Na2SO4浓度为0.1 mol/L、电流密度为20 mA/cm2、曝气量为300 mL/min、中性条件下处理120 min时,对2,4-二硝基甲苯去除率达到94.31%,且循环使用10次处理效果依然维持在90%以上,性能未见明显下降。通过对还原产物浓度变化分析得出,2,4-二硝基甲苯的主要还原中间产物为2-氨基-4-硝基甲苯,最终还原产物为2,4-二氨基甲苯。
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吴勇
鲍扬
朱兆连
仲维啸
王海玲
关键词:  河底泥陶粒  溶胶-凝胶法  Sn-Sb-TiO2负载  2,4-二硝基甲苯  电催化    
Abstract: Sn-Sb-TiO2 electrode loaded by river sediment ceramsite is prepared through sol-gel method and characterized by SEM and XRD.The performance of this electrode in electrocatalytic degradation of simulated 2,4-dinitrotoluene wastewater is investigated,and the corresponding reduction products and reduction mechanism are discussed preliminarily.The results show that there is a dense Sn-Sb-TiO2 metal oxide surface layer on the surface of the prepared electrode,which exhibits good electrocatalytic treatment effect on simulated 2,4-dinitrotoluene wastewater.The 2,4-dinitrotoluene removal rate can reach 94.31% when the initial concentration of 2,4-dinitrotoluene is 100 mg·L-1,the concentration of electrolyte Na2SO4 is 0.1 mg·L-1,the current density is 20 mA·cm-2,the aeration volume is 300 mL·min-1 and the treatment time is 120 min under neutral condition.Furthermore,the removal rate will keep more than 90% and the performance is not significantly reduced after the electrode is repeatedly used for ten times.By analyzing the concentration changes of the reduction products,it is found that 2-amino-4-nitrotoluene is the main reduction intermediate and 2,4-diaminotoluene is the final reduction product.
Key words:  river sediment ceramsite    sol-gel method    Sn-Sb-TiO2 loading    2,4-dinitrotoluene    electrocatalysis
收稿日期:  2018-07-16      修回日期:  2019-01-29          
ZTFLH:  X703  
基金资助: 国家自然科学基金青年科学基金项目(51308284)
通讯作者:  朱兆连(1978-),男,博士,副教授,研究方向为水处理,通讯联系人,zlnju@njtech.edu.cn。    E-mail:  zlnju@njtech.edu.cn
作者简介:  吴勇(1994-),男,硕士研究生,研究方向为水处理,1546488007@qq.com
引用本文:    
吴勇, 鲍扬, 朱兆连, 仲维啸, 王海玲. 河底泥陶粒负载Sn-Sb-TiO2电极处理2,4-二硝基甲苯废水[J]. 现代化工, 2019, 39(4): 71-74,76.
WU Yong, BAO Yang, ZHU Zhao-lian, ZHONG Wei-xiao, WANG Hai-ling. Treatment of simulated 2,4-dinitrotoluene wastewater with river sediment ceramsite loaded Sn-Sb-TiO2 electrode. Modern Chemical Industry, 2019, 39(4): 71-74,76.
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http://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2019.04.016  或          http://www.xdhg.com.cn/CN/Y2019/V39/I4/71
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