Influencing Factors and Kinetics of Modified Shell Powder/La-Fe-TiO2 Photocatalytic Degradation of Pyridine Wastewater

Jinkai Shu; Bozhi Ren; Wei Zhang; An Wang; Sen Lu; Shuyu Liu

doi:10.3390/ijerph192214835

Influencing Factors and Kinetics of Modified Shell Powder/La-Fe-TiO₂ Photocatalytic Degradation of Pyridine Wastewater

Int J Environ Res Public Health. 2022 Nov 11;19(22):14835. doi: 10.3390/ijerph192214835.

Authors

Jinkai Shu^{1

2

3

4}, Bozhi Ren^{2

3

4}, Wei Zhang^{1

3}, An Wang^{1

3}, Sen Lu^{1

3}, Shuyu Liu¹

Affiliations

¹ School of Municipal and Surveying Engineering, Hunan City University, Yiyang 413000, China.
² School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
³ Hunan Provincial Village Drinking Water Quality Safety Engineering Technology Research Center, Yiyang 413000, China.
⁴ Hunan Provincial Key Laboratory of Shale Gas Resource Exploitation, Xiangtan 411201, China.

Abstract

Modified Shell Powder/La-Fe-TiO₂ (La-Fe-TiO₂@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-TiO2@MSP; photocatalysis; pyridine; reaction kinetics.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Catalysis
Kinetics
Powders
Pyridines*
Wastewater*

Substances

Waste Water
titanium dioxide
Powders
Pyridines

Grants and funding

This research was funded by B.R., grant number 41973078; W.Z., grant number 42071122; S.L. (Sen Lu), grant number 21C0670; J.S., grant number 20C0366, S202211527009; A.W., grant number 20A089.