Preparation of ordered nano-porous Ti<sub>4</sub>O<sub>7</sub> REM and its performance in treatment of coking wastewater

YU Jifang; CHI Mingzhe; BAI Feifei; SUN Gang; WANG Jianbing

doi:10.13205/j.hjgc.202609003

Volume 44 Issue 9

Sep. 2026

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2026 > 44(9): 18-29

YU Jifang, CHI Mingzhe, BAI Feifei, SUN Gang, WANG Jianbing. Preparation of ordered nano-porous Ti4O7 REM and its performance in treatment of coking wastewater[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(9): 18-29. doi: 10.13205/j.hjgc.202609003

Citation:

YU Jifang, CHI Mingzhe, BAI Feifei, SUN Gang, WANG Jianbing. Preparation of ordered nano-porous Ti₄O₇ REM and its performance in treatment of coking wastewater[J]. ENVIRONMENTAL ENGINEERING , 2026, 44(9): 18-29. doi: 10.13205/j.hjgc.202609003

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Preparation of ordered nano-porous Ti₄O₇ REM and its performance in treatment of coking wastewater

doi: 10.13205/j.hjgc.202609003

YU Jifang^1,2,
CHI Mingzhe^1,2,
BAI Feifei^1,2,
SUN Gang^1,2,
WANG Jianbing^{3
,
,}

1. Coal Science (Beijing) New Material Technology Co., Ltd., Beijing 100013, China;
2. China Coal Research Institute, Beijing 100013, China;
3. School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

Received Date: 2025-11-02
Available Online: 2026-11-05

Abstract

Abstract

In recent years， the existing secondary biochemical process has been difficult to achieve the standard COD discharge of coking wastewater. Although the electrochemical oxidation technology with Ti₄O₇ REM as the anode can effectively remove organic matter in the secondary biochemical effluent， there is a problem of high energy consumption. Enhancing the catalytic activity of the electrodes is the key to reducing the energy consumption. To enhance the catalytic activity of Ti₄O₇ REM， ordered nano-porous Ti₄O₇ particles were synthesized by self-assembly in this research. These particles were then loaded onto a porous titanium substrate， to obtain a Ti-based ordered nano-porous Ti₄O₇ electroactive membrane （named ordered nano-porous Ti₄O₇ REM）. Using ordered nano-porous Ti₄O₇ REM as the anode， the Ti₄O₇ REM superimposed reactor was constructed to deeply remove the organic substances in the biochemical effluent of coking wastewater. The result showed that the ordered nanoporous structure compressed the width of the charge layer （d_sc = 0.97 nm）， increasing the probability of electron tunneling and shortening the electron transmission path， which enhanced the excitation activity of ·OH. Under the oxidative conditions of a current density of 15 mA/cm² and the electrolysis time of 120 minutes， the energy consumption was 96.7 kW·h/kg COD， the TOC removal rate was 62.7%， the COD removal rate was 88.5%， and the effluent COD met the limit requirements of the Pollutant Discharge Standard for Coking Chemical Industry（GB 16171—2012）.
- Ti₄O₇,
- reactive electrochemical membrane,
- electrochemical oxidation,
- coking wastewater,
- secondary biochemical effluent

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References(20)

References

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