Fe<sub>2</sub>O<sub>3</sub>@SCe多相芬顿催化剂的制备及其降解放热性能

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Abstract Exothermic laws of a heterogeneous Fenton system in the degradation of organic sewage were investigated to facilitate the energy utilization in sewage treatment practices. In this study, semicoke (SCe) was used as the carrier to prepare a novel Fe₂O₃@SCe composite material, which was then characterized by Brunauer, Emmett, and Teller surface area analysis, Fourier-transform infrared spectroscopy, x-ray diffraction, and scanning electron microscopy. The degradation performance and exothermic laws of the Fe₂O₃@SCe/H₂O₂ heterogeneous Fenton system for the treatment of o-phenylenediamine (OPD) organic sewage were studied. The results showed that Fe₂O₃ was uniformly loaded on the surface of the SCe particles. The Fe₂O₃@SCe composite material retained its porous form and exhibited strong adsorption capacity and high catalytic activity over a wide pH range (3.1~8.9), an effective broadening of the pH range of the classic homogeneous Fenton reaction. Both the dissolution reactions in Fe₂O₃@SCe/H₂O₂ heterogeneous Fenton and the degradation reactions of Fe₂O₃@SCe/H₂O₂ and simulated OPD sewage released large amounts of heat. The temperature of the solution reached 7.1℃ higher and was accompanied by a degradation efficiency of 88.2% under the following experimental conditions: [OPD] = 0.04mol/L, pH = 7.8, T₀ = 30℃, [H₂O₂] = 0.25mol/L, [Fe₂O₃@SCe] = 533g/L, and t = 180min. The concentration of H₂O₂ was found to be the dominant factor affecting exothermic heat release during the heterogeneous Fenton reaction.

Key words： fenton thermal energy catalyst adsorption degradation sewage

Received: 14 January 2020

PACS:

X703.5

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	YAN Yun-tao
	ZHANG Ke
	MAO Yan-peng
	DONG Yong

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YAN Yun-tao,ZHANG Ke,MAO Yan-peng等. Preparation of Fe₂O₃@SCe heterogeneous fenton catalyst and its degradation exothermic performance[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(8): 3375-3384.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I8/3375

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