Electrochemical oxidation of tetrahydrofurfuryl acohol on boron-doped diamond anode: Influence of current density and electrolyte solution

Huiqiang Liu; Xiaofan Hong; Jingshuang Chen; Xu Lin; Bing Wang; Ying Xiong

doi:10.1016/j.chemosphere.2023.140396

Electrochemical oxidation of tetrahydrofurfuryl acohol on boron-doped diamond anode: Influence of current density and electrolyte solution

Chemosphere. 2023 Dec:345:140396. doi: 10.1016/j.chemosphere.2023.140396. Epub 2023 Oct 9.

Authors

Huiqiang Liu¹, Xiaofan Hong², Jingshuang Chen¹, Xu Lin², Bing Wang³, Ying Xiong⁴

Affiliations

¹ State Key Laboratory for Environment-friendly Energy Materials, Southwest University of Science & Technology, Mianyang, 621010, PR China; School of Materials & Chemistry, Southwest University of Science & Technology, Mianyang, 621010, PR China.
² School of Materials & Chemistry, Southwest University of Science & Technology, Mianyang, 621010, PR China.
³ School of Materials & Chemistry, Southwest University of Science & Technology, Mianyang, 621010, PR China. Electronic address: wangbing67@163.com.
⁴ State Key Laboratory for Environment-friendly Energy Materials, Southwest University of Science & Technology, Mianyang, 621010, PR China; School of Materials & Chemistry, Southwest University of Science & Technology, Mianyang, 621010, PR China. Electronic address: xiongying@swust.edu.cn.

PMID: 37820875
DOI: 10.1016/j.chemosphere.2023.140396

Abstract

Tetrahydrofurfuryl alcohol (THFA), a widely applied raw materials, intermediate and solvent in the fields of agricultural, industry (especially in nuclear industry), is a potentially hazardous and non-biodegradable pollutant in wastewater. In this study, the electrochemical degradation pathways of THFA by a boron-doped diamond (BDD) anode with different current density (j_appl = 20, 40 and 60 mA cm^-2) and electrolyte solution (KNO₃, KCl and K₂SO₄) was carefully investigated. The results exhibit that high chemical oxygen demand (COD) removal and mineralization rates were achieved by rapid non-selective oxidation in electrolyte solutions mediated by hydroxyl radicals (∙OH) and active chlorine (sulfate) under constant current electrolysis. In-depth data analysis using the high performance liquid chromatography and liquid chromatography/mass spectroscopy, the underlying removal pathways of THFA in KNO₃, KCl and K₂SO₄ electrolyte solutions are proposed according to the effect of different mineralization mechanisms.

Keywords: Activated chlorine; Anodic oxidation; Chemical oxygen demand; Tetrahydrofurfuryl acohol; ∙OH.

MeSH terms

Boron* / chemistry
Diamond / chemistry
Electrodes
Sulfates / chemistry
Water Pollutants, Chemical* / analysis

Substances

potassium sulfate
Boron
Diamond
Water Pollutants, Chemical
Sulfates