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Efficient treatment of British gas/lurgi coal gasification wastewater using new electro-fenton catalyzed by biogas residues and coal fly ash composite as heterogeneous catalyst

100%

Ping L., Shan S., Zhuang H., Guo J., Fang C.

Polish Journal of Environmental Studies

2018

tom 27

nr 4

Biogas residues and coal fly ash composite (CFA/BRC) were first investigated as novel heterogeneous catalysts for strengthening electro-Fenton (EF) of real British gas/Lurgi coal gasification wastewater. The prepared CFA/BRC was characterized by different techniques, i.e., SEM, XRD, BET surface area, XRF, and ICP-AES. The results indicated that CFA/BRC significantly improved performance of pollutant removal in EF across a wide pH range with current density of 10 mA/cm² and catalyst dosage of 1.0 g/L, and the treated wastewater was more biodegradable than homogeneous EF. Meanwhile, CFA/BRC showed superior stability at successive 2,400-min runs, and leached concentrations of heavy metals were very low without the second pollutant. The change of concentrations of dissolved oxygen and electro-generated H₂O₂, and fluorescence test indicated that the novel catalyst could enhance H₂O₂ decomposition into more hydroxyl radicals, which was considered to be mainly responsible for the pollutant removal. And the results offered new insights into sustainable use of waste materials.

Ograniczanie wyników

1 Polish Journal of Environmental Studies

1 Fang C.

1 Guo J.

1 Ping L.

1 Shan S.

1 Zhuang H.

1 2018

Wyniki wyszukiwania

Efficient treatment of British gas/lurgi coal gasification wastewater using new electro-fenton catalyzed by biogas residues and coal fly ash composite as heterogeneous catalyst