W元素掺杂CeO2非均相电芬顿催化剂高效处理含油污水

doi:10.7503/cjcu20190598

高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (3): 498.doi: 10.7503/cjcu20190598

W元素掺杂CeO₂非均相电芬顿催化剂高效处理含油污水

刘义刚¹,赵鹏¹,韩玉贵¹,宋鑫¹,韩志鹏²,谢良波²,李壮²,贾晓庆²,李轶^2,^*

^1. 中海石油(中国)有限公司天津分公司渤海石油研究院, 天津 300452
^2. 天津大学理学院, 天津 300072

收稿日期:2019-11-19 出版日期:2020-02-26 发布日期:2020-01-06
通讯作者: 李轶
作者简介:李轶, 女, 博士, 教授, 博士生导师, 主要从事油田开发与分析研究. E-mail: liyi@tju.edu.cn
基金资助:
国家科技重大专项资助(No.2016ZX05058)

W Element Doped CeO₂ as Heterogeneous Electro-Fenton Catalyst for Efficient Treatment of Oily Wastewater ^†

LIU Yigang¹,ZHAO Peng¹,HAN Yugui¹,SONG Xin¹,HAN Zhipeng²,XIE Liangbo²,LI Zhuang²,JIA Xiaoqing²,LI Yi^2,^*

^1. Bohai Oilfield Research Institute, China National Offshore Oil Corporation, Tianjin Branch, Tianjin 300452, China
^2. School of Science, Tianjin University, Tianjin 300072, China

Received:2019-11-19 Online:2020-02-26 Published:2020-01-06
Contact: Yi LI
Supported by:
† Supported by the National Science and Technology Major Project of the Ministry of Science and Technology of China(No.2016ZX05058)

摘要/Abstract

摘要：

制备了W元素掺杂的CeO₂复合材料, 通过扫描电子显微镜、透射电子显微镜、 X射线衍射和X射线光电子能谱等对W-CeO₂-0.4催化材料进行表征. 结果表明, 具有不规则片状形貌的W元素掺杂CeO₂复合材料提高了单一CeO₂的类芬顿催化效果; 将其作为非均相电芬顿催化剂对含油污水的处理效果明显优于电吸附和物理吸附过程. 进一步的参数优化处理实验发现, 在电压为4 V, pH=3时, 采用W-CeO₂-0.4作为催化剂的条件下, 对含油污水的净化能力在90 min内达到了99.8%, 总有机碳(TOC)去除率达到了约90%, 化学需氧量(COD)去除率达到了76%.

关键词: 电芬顿, 催化降解, 含油污水, 废水处理, 非均相

Abstract:

W element-doped CeO₂ was designed as heterogeneous Electro-Fenton(EF) catalyst to purify oily wastewater, and the effect of efficient purification of oily wastewater was realized. In addition, W-CeO₂-0.4 composite was characterized by means of scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The results showed that W element doped CeO₂ with irregular flake morphology has better redox ability and Fenton-like catalytic effect compared with pure CeO₂. As heterogeneous EF catalyst, the treatment effect of oily wastewater is better than that of electro-adsorption and physical adsorption obviously. In the further parameter optimization experiment, it was found that the purification capacity of oily wastewater reached 99.8%, TOC removal rate reached about 90%, COD removal rate reached 76% in 90 min when the voltage was 4 V, pH=3 and W-CeO₂-0.4 was used as catalyst.

Key words: Electro-Fenton, Catalytic degradation, Oily sewage, Wastewater treatment, Heterogeneous

中图分类号:

O647

TrendMD:

刘义刚,赵鹏,韩玉贵,宋鑫,韩志鹏,谢良波,李壮,贾晓庆,李轶. W元素掺杂CeO₂非均相电芬顿催化剂高效处理含油污水. 高等学校化学学报, 2020, 41(3): 498.

LIU Yigang,ZHAO Peng,HAN Yugui,SONG Xin,HAN Zhipeng,XIE Liangbo,LI Zhuang,JIA Xiaoqing,LI Yi. W Element Doped CeO₂ as Heterogeneous Electro-Fenton Catalyst for Efficient Treatment of Oily Wastewater ^†. Chem. J. Chinese Universities, 2020, 41(3): 498.

图/表 6

Fig.1 SEM image of W-CeO2-0.4(A), TEM images of W-CeO2-0.4(B, C) and XRD patterns of CeO2 with different W doping ratios(D)

Fig.2 XPS survey spectra of W-CeO2-0.4(A) and XPS spectra of Ce3d(B), W4f(C), O1s(D) of W-CeO2-0.4

Fig.3 Comparison of different treatment methods(A), different catalysts(B), different voltage(C) and effect of different pH(D) on treatment of oily wastewater The optimal experimental conditions: c(Na2SO4)=50 mmol/L, pH = 3, voltage=4 V, catalyst dose=10 mg. In addition to the factors discussed, each group of experiments was conducted under the optimal conditions.

Fig.4 Changes in water quality of oily wastewater during physical adsorption(A), electro-adsorption(B) and heterogeneous EF(C)

Fig.5 Viscosity(A), storage modulus changes(B) in the degradation process, comparison of TOC remo-val rate(C) and COD removal rate(D) in degradation process under different treatment methods

Fig.6 Comparison of residual TOC(A) and COD(B) in degradation process under different treatment methods

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W元素掺杂CeO₂非均相电芬顿催化剂高效处理含油污水

W Element Doped CeO₂ as Heterogeneous Electro-Fenton Catalyst for Efficient Treatment of Oily Wastewater ^†

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