负载型活性炭粒子三维电极法处理亚甲基蓝模拟废水

doi:10.19964/j.issn.1006-4990.2023-0351

Abstract

Abstract:

To improve the effect of electrocatalytic oxidation on methylene blue（MB） simulated wastewater by particle electrode in three-dimensional electrode system，a particle electrode（M/AC） combining metal oxides with granular activated carbon was successfully synthesized with equal volume impregnation and sintering methods and characterized.The effects of the type and loading of metal components on the catalytic performance of the particle electrode were investigated.Moreover，the reaction mechanism of the synthesized particle electrode was discussed.The results indicated that：M/AC particle electrode had multi-channel porous network structure，which could provide a large number of surface active sites.The M/AC particle electrode showed good electrocatalytic degradation ability for high concentration MB simulated wastewater in three-dimensional electrode system.The optimal loading capacity of Mn/AC particle electrode was 5%（mass fraction），and its electrocatalytic oxidation performance was better than that of Fe/AC and Ni/AC particle electrode.The electrocatalytic degradation rate of Mn（5）/AC in the three-dimensional electrode system was 90% after 8 h，and could still reach more than 80% after 200 h.In the electrocatalytic oxidation process，Mn²⁺，Mn³⁺ and Mn⁴⁺ on the surface of Mn/AC particle electrode could achieve catalytic cycling and produce active substances（hydroxyl radical and superoxide radical）.Mn/AC particle electrode had the potential for long-term stable electrocatalytic degradation of organic pollutants in water.

Key words: three-dimensional electrode, particle electrode, activated carbon, metal oxide, electrocatalysis

CLC Number:

O647.3

XIE Jiang, GUO Ge, QIU Jie. Treatment of methylene blue simulated wastewater by supported activated carbon particle with three-dimensional electrode method[J]. Inorganic Chemicals Industry, 2024, 56(5): 78-86.

Figures/Tables 12

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粒子电极优化实验	金属组分的前驱体盐种类及用量	金属组分负载量（质量分数，以载体为基准）及粒子电极命名M（X）/AC
金属组分种类的影响	1.082 g Fe（NO₃）₃·9H₂O	5%［Fe（5）/AC］
	1.038 mL Mn（NO₃）₂溶液	5%［Mn（5）/AC］
	0.779 g Ni（NO₃）₂·6H₂O	5%［Ni（5）/AC］
金属组分Mn 负载量的影响	0.208 mL Mn（NO₃）₂溶液	1%［Mn（1）/AC］
	0.623 mL Mn（NO₃）₂溶液	3%［Mn（3）/AC］
	1.038 mL Mn（NO₃）₂溶液	5%［Mn（5）/AC］
	1.454 mL Mn（NO₃）₂溶液	7%［Mn（7）/AC］

考察因素	粒子电极	比表面积/ （m²·g^-1）	孔容/ （cm³·g^-1）	平均孔径/ nm
空白材料	AC	607	0.35	19.92
金属组分种类	Mn（5）/AC	336	0.24	15.24
	Fe（5）/AC	400	0.26	14.24
	Ni（5）/AC	336	0.24	14.88
金属组分 Mn负载量	Mn（1）/AC	611	0.35	21.74
	Mn（3）/AC	557	0.32	20.67
	Mn（5）/AC	336	0.24	15.24
	Mn（7）/AC	269	0.21	12.25

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Treatment of methylene blue simulated wastewater by supported activated carbon particle with three-dimensional electrode method

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