改性阴极生物电芬顿系统降解罗丹明B

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Abstract The composite electrodes were proved to be able to improve the in-situ production capacity of H₂O₂ in the electro-Fenton system, enhancing the efficiency of degrading dye wastewater. In this paper, the performance impacts of two composite electrodes, Fe/OC-OATC and Fe/PC, on the electro-Fenton system were investigated. We first pre-processed the electrodes with octanecyl trimethyl ammonium chloride(OATC) and phosphoric acid, then the iron was loaded on the carbon cloth to fabricate the Fe/OC-OATC electrode and Fe/PC electrode. The electrochemical properties of the two composite electrodes were analyzed through polarization curves, power density curves and cyclic voltammetry curves. The results indicated that the Fe/OC-OATC electrode had better performance in the current density, maximum power density and oxygen reduction ability tests than the Fe/PC electrode. The maximum power density of Fe/OC-OATC was 4.89W/m³, and its corresponding current density could reach 22.9A/m³. Subsequently, the effects of the bioelectric Fenton systems with Fe/OC-OATC and Fe/PC electrode were also explored in the procedure of Rhodamine B degradation. The results revealed that the Fe/OC-OATC system had a higher Rhodamine B removal rate of 96.4% than the Fe/PC system. Finally, the degradation mechanism of Rhodamine B in the two systems were investigated with the kinetic analysis and reaction mechanism analysis.

Key words： bioelectric fenton octadecyl trimethyl ammonium chloride (OATC) modification cathode Rhodamine B

Received: 01 September 2020

PACS:

X703.5

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	Articles by authors
	DU Mao-hua
	LI Hao-xin
	RENG jing
	ZHAO huan
	ZHANG Ji-yue
	SONG You-tao

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DU Mao-hua,LI Hao-xin,RENG jing等. Electricity production and Rhodation B degradation in bioelectric fenton system with modified cathode[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(4): 1681-1688.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I4/1681

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