非均相类Fenton法降解硝基苯化工废水的效能及其机制

doi:10.3969/j.issn.0438-1157.2014.04.045

化工学报 ›› 2014, Vol. 65 ›› Issue (4): 1488-1494.DOI: 10.3969/j.issn.0438-1157.2014.04.045

非均相类Fenton法降解硝基苯化工废水的效能及其机制

蒋胜韬^1,2, 祝建中², 管玉江¹, 白书立¹, 姚俊³, 唐天菲¹

1 浙江台州学院环境工程系, 浙江台州 318000;
2 河海大学环境学院, 江苏南京 210098;
3 浙江新农化工股份有限公司, 浙江台州 317300

收稿日期:2013-08-05 修回日期:2013-11-01 出版日期:2014-04-05 发布日期:2013-11-26
通讯作者: 蒋胜韬（1980—），男，博士研究生，讲师。
作者简介:蒋胜韬（1980—），男，博士研究生，讲师。
基金资助:
浙江省公益性技术应用研究计划项目（2013C33020）；台州市科技项目（111KY03）；浙江省环保科技计划项目（2013B018）；浙江省博士后科研项目择优项目（BSH1301012）。

Performance of heterogeneous Fenton-like system for degradation of nitrobenzene-containing wastewater

JIANG Shengtao^1,2, ZHU Jianzhong², GUAN Yujiang¹, BAI Shuli¹, YAO Jun³, TANG Tianfei¹

1 Department of Environmental Engineering, Taizhou University, Taizhou 318000, Zhejiang, China;
2 College of Environment, Hohai University, Nanjing 210098, Jiangsu, China;
3 Zhejiang Xinnong Chemical Industry Co., Ltd., Taizhou 317300, Zhejiang, China

Received:2013-08-05 Revised:2013-11-01 Online:2014-04-05 Published:2013-11-26
Supported by:
supported by the Public Technology Applied Research Fund of Zhejiang Province Science Technology Department(2013C33020), the Science & Technology Project of Taizhou (111KY003), the Scientific Research Fund of Zhejiang Environmental Protection Bureau(2013B018)and the Postdoctoral Sustentation Foundation of Zhejiang Province (BSH1301012).

摘要/Abstract

摘要： 以实验室制备的3A-Fe型分子筛为催化剂，并利用扫描电镜、能谱分析和XRD技术对催化剂进行了表征。在3A-Fe型分子筛与H₂O₂构建的非均相类Fenton催化体系内对硝基苯的降解效能和机制进行了研究，讨论了体系pH值、H₂O₂的投加量、催化剂投加量、硝基苯废水浓度对硝基苯降解率和反应速率的影响，并初步揭示了硝基苯的降解机理。结果表明：3A-Fe分子筛作为催化剂的类Fenton反应，在pH值2～10之间都具有较好的处理效果；类Fenton体系氧化降解反应过程是一种非均相的界面微观反应；3A-Fe类Fenton催化剂性能优越，对硝基苯废水中硝基苯的去除率为94.1%，COD_Cr和TOC的去除率分别为78.6%和60.5%。

关键词: 类Fenton, 沸石, 废水, 过氧化氢, 降解

Abstract: A heterogeneous Fenton-like catalytic system, consisted of 3A-Fe zeolite catalyst that was prepared in the laboratory and characterized by SEM, EDS and XRD, and H₂O₂ was used for degradation of nitrobenzene-containing wastewater. The effects of pH, H₂O₂ and nitrobenzene concentration, and catalyst dose on degradation of nitrobenzene were studied. An attempt to reveal the degradation mechanism was also done. The results showed that nitrobenzene had been significantly degraded in this Fenton-like system provided that pH value of wastewater was in the range of 2 to 10. No dissolved Fe(Ⅱ/Ⅲ) was detected for the Fenton-like system, indicating that nitrobenzene was directly degraded on surface of 3A-Fe zeolite catalyst rather than by the aqueous Fenton system. The 3A-Fe zeolite catalyst exhibited good stability in repeat use and the degradation rate of nitrobenzene could reach 94.1%, and the removal rate of COD_Cr and TOC, under the optimal conditions, were 78.6% and 60.5% respectively.

Key words: Fenton-like system, zeolite, wastewater, hydrogen peroxide, degradation

中图分类号:

X703

蒋胜韬, 祝建中, 管玉江, 白书立, 姚俊, 唐天菲. 非均相类Fenton法降解硝基苯化工废水的效能及其机制[J]. 化工学报, 2014, 65(4): 1488-1494.

JIANG Shengtao, ZHU Jianzhong, GUAN Yujiang, BAI Shuli, YAO Jun, TANG Tianfei. Performance of heterogeneous Fenton-like system for degradation of nitrobenzene-containing wastewater[J]. CIESC Journal, 2014, 65(4): 1488-1494.

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非均相类Fenton法降解硝基苯化工废水的效能及其机制

Performance of heterogeneous Fenton-like system for degradation of nitrobenzene-containing wastewater

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