A novel BiOX photocatalyst for the "green" degradation of polymers used in oilfields

Tengfei Dong; Guancheng Jiang; Yinbo He; Lili Yang; Guoshuai Wang; Yizheng Li

doi:10.1016/j.jhazmat.2021.128207

A novel BiOX photocatalyst for the "green" degradation of polymers used in oilfields

J Hazard Mater. 2022 Apr 15:428:128207. doi: 10.1016/j.jhazmat.2021.128207. Epub 2022 Jan 4.

Authors

Tengfei Dong¹, Guancheng Jiang², Yinbo He¹, Lili Yang¹, Guoshuai Wang¹, Yizheng Li¹

Affiliations

¹ College of Petroleum Engineering, China University of Petroleum (Beijing), 18 Fuxue Road, Changping, Beijing 102249, People's Republic of China; State Key Laboratory of Petroleum Resources and Prospecting, Ministry of Education (MOE) Key Laboratory of Petroleum Engineering, China University of Petroleum (Beijing), Fuxue Road No 18, Changping, Beijing 102249, People's Republic of China.
² College of Petroleum Engineering, China University of Petroleum (Beijing), 18 Fuxue Road, Changping, Beijing 102249, People's Republic of China; State Key Laboratory of Petroleum Resources and Prospecting, Ministry of Education (MOE) Key Laboratory of Petroleum Engineering, China University of Petroleum (Beijing), Fuxue Road No 18, Changping, Beijing 102249, People's Republic of China. Electronic address: m15600263100_1@163.com.

PMID: 35007969
DOI: 10.1016/j.jhazmat.2021.128207

Abstract

The wastes from functional polymers (polyanionic cellulose, polyacrylamide, potassium polyacrylamide, and hydroxyethyl cellulose) generated during oil and gas exploration and development are harmful to biodiversity and human health. However, most traditional treatments are inefficient in degradation and cause secondary pollution. In this paper, BiOBr_0.5Cl_0.5 a 3D flower-like solid solution with in-situ deposition of elementary substance Bi and surface oxygen vacancies was synthesized by the hydrolysis and the redox methods. The chemical compositions, the morphologies, and the UV-visible absorption properties of Bi/BiOBr_0.5Cl_0.5 were characterized. Moreover, the photocatalytic activity of Bi/BiOBr_0.5Cl_0.5 and the kinetic behavior of the RhB photocatalytic degradation were investigated. The photocatalytic degradation of RhB followed a pseudo-first-order kinetic reaction, and Bi/BiOBr_0.5Cl_0.5-0.3 demonstrated the highest photocatalytic activity: The RhB degradation efficiency of Bi/BiOBr_0.5Cl_0.5-0.3 was 85%, and the COD removal rate of the functional polymers conducted by Bi/BiOBr_0.5Cl_0.5-0.3 was greater than 80%. The exciton photocatalytic processes of Bi/BiOBr_0.5Cl_0.5 was found through the electron spin resonance (ESR) and the active-species trapping analyses of the photocatalytic degradations of RhB by Bi/BiOBr_0.5Cl_0.5. In summary, in this paper, the synthesis methods of Bi/BiOBr_0.5Cl_0.5 photocatalyst and the photocatalytic activity of the Bi/BiOBr_0.5Cl_0.5 on the degradations of polymers used in oilfields were reported, addressing the shortcomings of the existing treatments for polymer waste fluids that are incorporated into the oil and gas exploration and development process.

Keywords: Active species; Bi/BiOBr(0.5)Cl(0.5); Photocatalyst; Polymer; Self-degradation.

Publication types

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

MeSH terms

Catalysis
Humans
Light
Oil and Gas Fields*
Polymers*

Substances

Polymers