The treatment of folic acid wastewater by photoelectric synergistic treatment with activated carbon particle loaded with Fe-TiO2

doi:10.11894/iwt.2019-0455

Abstract

Abstract:

Folic acid wastewater is treated by three-dimensional electrode coupling photocatalysis. A Fe-doped TiO₂supported activated carbon particle electrode Fe-TiO₂/AC is prepared by sol-gel method, and then characterized by XRD, SEM and BET. The operating parameters of three-dimensional electrode coupling photocatalysis are optimized for the folic acid wastewater treatment. The results show that Fe-TiO₂/AC has better morphology and photocatalytic activity than TiO₂/AC. Under the following conditions:doping amount in Fe of 0.4%, the current density of 0.6 mA/cm², pH of 5, and aeration of 6 L/min, the TOC removal reaches 82.4% after 120 minutes of reaction. The reaction confirms to the second-order kinetic model and has obvious photoelectric synergistic enhancement effect in the degradation process of organic matter.

Key words: iron doping, titanium dioxide, photocatalysis, three-dimensional electrolysis, folic acid wastewater

摘要：

采用三维电极耦合光催化处理叶酸废水。通过溶胶-凝胶浸渍法制备了掺Fe改性TiO₂负载活性炭颗粒电极（Fe-TiO₂/AC），进行XRD、SEM和BET表征，并优化三维电极耦合光催化处理叶酸废水的运行参数。结果表明，Fe-TiO₂/AC比TiO₂/AC有更好的形貌结构和光催化活性。在Fe掺杂质量分数为0.4%，电流密度为0.6 mA/cm²，pH为5，曝气量为6 L/min的条件下，反应120 min后TOC去除率达到82.4%。反应符合二级动力学模型，在有机物降解过程中具有明显的光电协同增强作用。

关键词: Fe掺杂, 二氧化钛, 光催化, 三维电解, 叶酸废水

CLC Number:

X703

Junwo Zhou,Yong Gao,Zhen Zhou,Tingting Li,Chu Sun,Yuxuan Liu,Rong Mei. The treatment of folic acid wastewater by photoelectric synergistic treatment with activated carbon particle loaded with Fe-TiO₂[J]. Industrial Water Treatment, 2020, 40(4): 39-43.

周俊我,高永,周桢,李婷婷,孙楚,刘宇轩,梅蓉. 活性炭颗粒负载Fe-TiO₂光电协同处理叶酸废水[J]. 工业水处理, 2020, 40(4): 39-43.

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URL: https://www.iwt.cn/EN/10.11894/iwt.2019-0455

https://www.iwt.cn/EN/Y2020/V40/I4/39

Figures/Tables 8

References 14

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项目	比表面积/（m²·g^-1）	总孔容/（cm³·g^-1）	平均孔径/nm
AC	283.136	0.145	1.056
TiO₂/AC	387.694	0.204	1.048
Fe-TiO₂/AC	412.681	0.244	1.086

项目	比表面积/（m²·g^-1）	总孔容/（cm³·g^-1）	平均孔径/nm
AC	283.136	0.145	1.056
TiO₂/AC	387.694	0.204	1.048
Fe-TiO₂/AC	412.681	0.244	1.086

项目		三维电解耦合光催化	AC三维电解	二维电解	光催化
一级动力学	k₁	0.013 4	0.008 1	0.003 5	0.002 2
一级动力学	R²	0.967 2	0.990 7	0.940 6	0.980 4
二级动力学	k₂	0.034 7	0.013 9	0.004 4	0.002 6
二级动力学	R²	0.997 0	0.993 8	0.962 5	0.987 8

项目		三维电解耦合光催化	AC三维电解	二维电解	光催化
一级动力学	k₁	0.013 4	0.008 1	0.003 5	0.002 2
一级动力学	R²	0.967 2	0.990 7	0.940 6	0.980 4
二级动力学	k₂	0.034 7	0.013 9	0.004 4	0.002 6
二级动力学	R²	0.997 0	0.993 8	0.962 5	0.987 8

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The treatment of folic acid wastewater by photoelectric synergistic treatment with activated carbon particle loaded with Fe-TiO₂

活性炭颗粒负载Fe-TiO₂光电协同处理叶酸废水

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