电化学氧化和臭氧化预处理酸性化工废水的效能研究

doi:10.61558/2993-074X.2138

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (5): 472-476. doi: 10.61558/2993-074X.2138

• 环境电化学近期研究专辑（吉林大学林海波教授主编） • 上一篇下一篇

电化学氧化和臭氧化预处理酸性化工废水的效能研究

刘汉水，余夙，童少平^*，马淳安

浙江工业大学化学工程与材料学院，绿色化学合成技术国家重点实验室培育基地，浙江杭州 310032

收稿日期:2012-12-25 修回日期:2013-03-18 出版日期:2013-10-28 发布日期:2013-03-18
通讯作者: 童少平 E-mail:sptong@zjut.edu.cn
基金资助:
国家自然科学基金项目（No. 20406019，No. 21176225）资助

A Comparative Study in Pretreatments of Acid Chemical Wastewater by Electrochemical Oxidation and Ozonation

LIU Han-shui, YU su, TONG Shao-ping^*, MA Chun-an

College of Chemical Engineering and Materials Science, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032,China

Received:2012-12-25 Revised:2013-03-18 Published:2013-10-28 Online:2013-03-18
Contact: TONG Shao-ping E-mail:sptong@zjut.edu.cn

摘要/Abstract

摘要： 保持一定酸度条件下对比了电化学氧化和臭氧氧化预处理酸性化工废水的效能（废水原pH 0.85）. 结果表明，在废水中添加2 g·L^-1 NaCl电化学氧化预处理效果较佳，30 mA·cm^-2条件下电解20 min后水样的CODCr（化学需氧量）去除率达43.4%，BOD₅/COD_Cr（生化需氧量与化学需氧量的比值）值从原来的0.034上升至0.14，可生化性明显提高. 单独臭氧化仅在pH 7.0才能取得一定的预处理效能. Ti(Ⅳ)/O₃/H₂O₂高级氧化体系在pH 2.85条件下亦有较好的预处理效果，16 min后水样COD_Cr去除率达22.9%，BOD₅/COD_Cr值则提高至0.072.

关键词: 电氧化, 臭氧化, 高级氧化技术, 钛离子, 酸性化工废水

Abstract: Under the condition of keeping certain acidity, the pretreatment efficiency of an acid chemical wastewater (pH 0.85) by electrochemical oxidation was compared with that by ozonation. The results showed that the electrochemical oxidation pretreatment could obtain a better result than the ozonation at pH 0.85. After the addition of 2 g·L^-1 NaCl and with the electrochemical oxidation pretreatment at 30 mA·cm^-2, the removal rate of chemical oxygen demand (CODCr) reached 43.4%, and the value of biochemical oxygen demand/chemical oxygen demand (BOD₅/COD_Cr) also increased from 0.034 to 0.14 in 20 minutes, indicating significantly improvement in the biodegradability of the wastewater. However, the ozonation alone had a low pretreatment efficiency at pH 0.85, and could only become as effective as those done by the electrochemical oxidation pretreatment at pH 7.0. A ozone-based advanced oxidation technology, Ti(Ⅳ)/O₃/H₂O₂, was also relatively effective at pH 2.85. The value of 22.9% for the removal rate of CODCr could be obtained and the value of BOD₅/COD_Cr went up from 0.034 to 0.072 in 16 min.

Key words: electrochemical oxidation, ozonation, advanced oxidation technology, titanium ion, acid chemical wastewater

中图分类号:

O646

刘汉水, 余夙, 童少平, 马淳安. 电化学氧化和臭氧化预处理酸性化工废水的效能研究[J]. 电化学（中英文）, 2013, 19(5): 472-476.

LIU Han-shui, YU su, TONG Shao-ping, MA Chun-an. A Comparative Study in Pretreatments of Acid Chemical Wastewater by Electrochemical Oxidation and Ozonation[J]. Journal of Electrochemistry, 2013, 19(5): 472-476.

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https://electrochem.xmu.edu.cn/CN/Y2013/V19/I5/472

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电化学氧化和臭氧化预处理酸性化工废水的效能研究

A Comparative Study in Pretreatments of Acid Chemical Wastewater by Electrochemical Oxidation and Ozonation

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