Influencing Factors and Kinetics of Modified Shell Powder/La-Fe-TiO 2 Photocatalytic Degradation of Pyridine Wastewater

Jinkai Shu, Bozhi Ren (), Wei Zhang (), An Wang, Sen Lu and Shuyu Liu ()
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Jinkai Shu: School of Municipal and Surveying Engineering, Hunan City University, Yiyang 413000, China
Bozhi Ren: School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
Wei Zhang: School of Municipal and Surveying Engineering, Hunan City University, Yiyang 413000, China
An Wang: School of Municipal and Surveying Engineering, Hunan City University, Yiyang 413000, China
Sen Lu: School of Municipal and Surveying Engineering, Hunan City University, Yiyang 413000, China
Shuyu Liu: School of Municipal and Surveying Engineering, Hunan City University, Yiyang 413000, China

IJERPH, 2022, vol. 19, issue 22, 1-16

Abstract: Modified Shell Powder/La-Fe-TiO 2 (La-Fe-TiO 2 @MSP) composites were fabricated using the sol-gel method and characterized by SEM, XRD, UV-vis DRS and photocurrent techniques, and their physicochemical and optical properties were analyzed. The effects of various factors on the photocatalytic degradation of pyridine and its reaction kinetics were investigated by batch experiments using pyridine, a typical nitrogen-containing heterocyclic compound in coal chemical wastewater, as the target removal species. The pyridine degradation rate of 80.23% was obtained for 800 mg/L composite solution by photocatalytic oxidation of 50 mg/L pyridine wastewater for 180 min at 35 °C, pH = 8 and light intensity of 560 W. The photocatalytic degradation performance was optimal. The quenching experiments determined that the active species of photodegradation were mainly hole and hydroxyl radicals, and the photocatalytic degradation mechanism was analyzed in this way.

Keywords: La-Fe-TiO 2 @MSP; photocatalysis; pyridine; reaction kinetics (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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