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Visible light assisted FeOOH/CeO2/C deep degradation of organic matter in coking wastewater

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Abstract

In order to degrade hard-to-degrade organic pollutants such as amines, phenols, naphthalenes, pyrroles and pyridazines in coking wastewater, the nano-FeOOH/CeO2/C composite catalysts (FCHCoke) were prepared. Firstly the catalysts were characterized by XRD, TEM, BET, BJH and UV/Vis/NIR. Then UV–Vis and GC–MS were used to detect the products in the degradation process of organic pollutants, respectively. The results showed that the average pore size of FCHCoke was 2–6 nm and the carrier coke enhanced the ability of the catalyst to absorbs visible light. Each intermittent light exposure for 2 h showed a better photodegradation. Under the intermittent irradiation of visible light of for a total of 8 h, 100µg۰mL−1aniline and phenol were completely degraded. Dihydronaphthalene, esters, pyrrole, pyridazine, oxime and macromolecular alkanes in coking wastewater were also completely degraded. The acidity of pH=6 is more suitable for the photodegradation reaction of the catalyst. Organic degradation is the result of a combination of chemical catalysis and photocatalysis.

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Funding

This work was Supported by the Shanxi Province Project 1331 Fund (Approval No.I-170230) and the Student Innovation Project (2019491).

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Correspondence to Fang Tian.

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Tian, F., Li, F. & Zhang, C. Visible light assisted FeOOH/CeO2/C deep degradation of organic matter in coking wastewater. Environ Sci Pollut Res 29, 48986–48994 (2022). https://doi.org/10.1007/s11356-021-18271-y

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