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Frontiers of Environmental Science & Engineering

ISSN 2095-2201

ISSN 2095-221X(Online)

CN 10-1013/X

Postal Subscription Code 80-973

2018 Impact Factor: 3.883

Front. Environ. Sci. Eng.    2015, Vol. 9 Issue (3) : 402-410    https://doi.org/10.1007/s11783-014-0659-8
RESEARCH ARTICLE
Application of Fe0/C/Clay ceramics for decoloration of synthetic Acid Red 73 and Reactive Blue 4 wastewater by micro-electrolysis
Xiaowei ZHANG,Qinyan YUE(),Dongting YUE,Baoyu GAO,Xiaojuan WANG
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
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Abstract

Dyes are common pollutants in textile wastewaters, and the treatment of the wastewater has now attracted much attention due to its wide application and low biodegradability. In this study, Fe0/C/Clay ceramics, a kind of novel micro-electrolysis filler, were sintered and employed in a dynamic micro-electrolysis reactor for synthetic Acid Red 73 (AR73) and Reactive Blue 4 (RB4) wastewater treatment. The effects of influent pH, hydraulic retention time (HRT), and aeration on the decoloration efficiencies of AR73 and RB4 were studied. The optimum conditions for wastewater treatment were: AR73, influent pH of 4, HRT of 2 h and aeration; RB4, influent pH of 5, HRT of 6 h and aeration. Under the optimum conditions, decoloration efficiency of AR73 and RB4 wastewater was 96% and 83%, respectively. Results of UV-vis spectrum scanning demonstrated that the chromophores were broken. Continuous running tests showed that improvement of micro-electrolysis system with Fe0/C/Clay ceramics for AR73 and RB4 synthetic wastewater treatment could avoid failure of micro-electrolysis reactor, which indicated great potential for the practical application of the ceramics in the field of actual industrial wastewater treatment.

Keywords Fe0/C/Clay ceramics      micro-electrolysis      Acid Red 73      Reactive Blue 4      synthetic wastewater     
Corresponding Author(s): Qinyan YUE   
Online First Date: 21 February 2014    Issue Date: 30 April 2015
 Cite this article:   
Xiaowei ZHANG,Qinyan YUE,Dongting YUE, et al. Application of Fe0/C/Clay ceramics for decoloration of synthetic Acid Red 73 and Reactive Blue 4 wastewater by micro-electrolysis[J]. Front. Environ. Sci. Eng., 2015, 9(3): 402-410.
 URL:  
https://academic.hep.com.cn/fese/EN/10.1007/s11783-014-0659-8
https://academic.hep.com.cn/fese/EN/Y2015/V9/I3/402
Fig.1  Molecular structure of Reactive Blue 4 (a) and Acid Red 73 (b)
Fig.2  Schematic diagram of experimental set-up (dimensioning unit: cm)
Fig.3  Microstructure of the Fe0/C/Clay ceramics: (a) surface, 70 times magnified; (b) surface, 700 times magnified; (c) fracture surface, 70 times magnified; (d) fracture surface, 700 times magnified
Fig.4  Impact of influent pH on color removal efficiency of AR73 and RB4; experimental parameters: C0 of 600 mg·L-1; HRT of 6 h; A/L of 1.5
Fig.5  Influence of HRT on decoloration efficiency of AR73 and RB4; experimental parameters: AR73, C0 of 600 mg·L-1, influent pH of 4, A/L of 1.5; RB4, C0 of 600 mg·L-1, influent pH of 5, A/L of 1.5
A/L removal rate /%
AR73 RB4
color CODCr color CODCr
0 99.0 36.5 90.6 5.2
1.5 95.8 49.2 82.7 12.0
Tab.1  Effect of aeration on micro-electrolysis efficiency of AR73 and RB4
Fig.6  UV–vis absorption spectrums of influent and effluent. (a) AR73; (b) RB4
Fig.7  Continuous running tests for AR73 and RB4 wastewater treatment: (a) AR73; (b) RB4
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