Degradation of nitrobenzene wastewater under Fe0/GAC-Fenton enhanced by ultrasound

doi:10.11949/j.issn.0438-1157.20161284

CIESC Journal ›› 2017, Vol. 68 ›› Issue (1): 297-304.DOI: 10.11949/j.issn.0438-1157.20161284

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Degradation of nitrobenzene wastewater under Fe⁰/GAC-Fenton enhanced by ultrasound

YU Lisheng, JIAO Weizhou, LIU Youzhi, LI Sulin, LI Aowen, ZHANG Min

Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, Shanxi, China

Received:2016-09-13 Revised:2016-10-26 Online:2017-01-05 Published:2017-01-05
Contact: 10.11949/j.issn.0438-1157.20161284
Supported by:
supported by the National Natural Science Foundations of China (21206153, U1610106) and the Excellent Youth Science and Technology Foundation of Province Shanxi of China (2014021007).

超声强化铁碳微电解-Fenton法降解硝基苯废水

余丽胜, 焦纬洲, 刘有智, 李苏霖, 李傲雯, 张敏

中北大学超重力化工过程山西省重点实验室, 山西太原 030051

通讯作者: 焦纬洲
基金资助:
国家自然科学基金项目（21206153，U1610106）；山西优秀青年基金项目（2014021007）；山西高等学校创新人才支持计划资助项目（201316）。

Abstract

Abstract:

Based on the problem of poorly continuous operation of the iron-carbon micro-electrolysis(Fe⁰/GAC)-Fenton method in nitrobenzene(NB) wastewater treatment, ultrasound(US) was used to strengthen Fe⁰/GAC-Fenton.The Effect of ultrasound on continuous running of Fe⁰/GAC-Fenton was studied.The results show that, when Fe⁰/GAC is not changed, the removal rate of NB for 4 batches of same NB wastewater treated by Fe⁰/GAC-Fenton drops from 69.54% to 31.66%, and TOC removal rate is down to 19.20% from 48.11%;whereas under US/Fe⁰/GAC-Fenton, 4 times of NB removal rates are close to 100%, and TOC removal rates are above 60%.Compared with Fe⁰/GAC-Fenton, ultrasound not only enhance the degradation efficiency of Fe⁰/GAC-Fenton in NB wastewater treatment, but also achieve a continuous and efficient operation.The effect of pH, dosage and adding time of H₂O₂ on degradation of effluent of US/Fe⁰/GAC by Fenton method were studied.The suitable operating parameters are H₂O₂ total dosage 4 ml, adding time=5, US/Fe⁰/GAC effluent pH=4.Under these conditions, after 30 min, the removal rate of NB reaches 100%, TOC removal rate reaches 75%.

Key words: ultrasound, micro-electrolysis, Fenton, nitrobenzene

摘要：

针对铁碳微电解（Fe⁰/GAC）-Fenton法降解硝基苯（NB）废水时难连续运行的问题，采用超声（US）强化铁碳微电解-Fenton法降解硝基苯废水。考察了超声对铁碳微电解-Fenton法连续运行效果的影响，研究表明：不更换铁碳填料时，Fe⁰/GAC-Fenton法连续处理4批硝基苯废水时，硝基苯去除率从69.54%降至31.66%，TOC去除率也从48.11%降至19.20%；而US/Fe⁰/GAC-Fenton法处理4批相同废水时，硝基苯去除率均近至100%，TOC去除率均稳定在60%以上。与单纯Fe⁰/GAC-Fenton相比，超声不仅整体上强化了Fe⁰/GAC-Fenton法降解硝基苯废水的效率，还实现了连续多次高效运行。研究了pH、H₂O₂投加量及投加次数对Fenton法降解US/Fe⁰/GAC出水的影响规律，得到适宜操作条件：H₂O₂总投加量为4 ml并分5次添加，US/Fe⁰/GAC的出水pH调为4，反应30 min，最终硝基苯去除率达到100%，TOC去除率可达75%。

关键词: 超声波, 微电解, Fenton, 硝基苯

CLC Number:

X703.1

YU Lisheng, JIAO Weizhou, LIU Youzhi, LI Sulin, LI Aowen, ZHANG Min. Degradation of nitrobenzene wastewater under Fe⁰/GAC-Fenton enhanced by ultrasound[J]. CIESC Journal, 2017, 68(1): 297-304.

余丽胜, 焦纬洲, 刘有智, 李苏霖, 李傲雯, 张敏. 超声强化铁碳微电解-Fenton法降解硝基苯废水[J]. 化工学报, 2017, 68(1): 297-304.

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Degradation of nitrobenzene wastewater under Fe⁰/GAC-Fenton enhanced by ultrasound

超声强化铁碳微电解-Fenton法降解硝基苯废水

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