Efficient peroxymonosulfate activation by N-rich pyridyl-iron phthalocyanine derivative for the elimination of pharmaceutical contaminants under solar irradiation

Jingxuan Li; Tiefeng Xu; Junting Gao; Zhendong Wang; Gangqiang Wang; Wenxing Chen; Wangyang Lu

doi:10.1016/j.chemosphere.2022.134464

Efficient peroxymonosulfate activation by N-rich pyridyl-iron phthalocyanine derivative for the elimination of pharmaceutical contaminants under solar irradiation

Chemosphere. 2022 Jul:299:134464. doi: 10.1016/j.chemosphere.2022.134464. Epub 2022 Mar 28.

Authors

Jingxuan Li¹, Tiefeng Xu¹, Junting Gao¹, Zhendong Wang¹, Gangqiang Wang¹, Wenxing Chen¹, Wangyang Lu²

Affiliations

¹ National Engineering Lab for Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, China.
² National Engineering Lab for Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, China. Electronic address: luwy@zstu.edu.cn.

PMID: 35358552
DOI: 10.1016/j.chemosphere.2022.134464

Abstract

It is of great significance for improving electron transmission performance by changing of the outer ring structure of iron phthalocyanine. Herein, 4 (pyridine-2, 3-yl) iron phthalocyanine (FepyPc), as N-rich pyridyl-iron phthalocyanine derivative, was introduced to degrade pharmaceutical contaminants. The catalytic degradation of organic pollutants with FepyPc was studied by activating peroxymonosulfate (PMS) at room temperature. The results clarified that the removal rate of carbamazepine (CBZ) was close to 100% within 60 min and the calculated apparent rate constant was about 2 times larger than FePc, which proved that FepyPc had superior performance. Four active species were identified for the degradation of CBZ, including superoxide radical (•O₂^-), singlet oxygen (¹O₂), sulfate radical (SO₄•^-) and hydroxyl radical (•OH). In addition, the possible reaction mechanism was inferred in FepyPc/PMS/sunlight system for CBZ removal. Finally, the CBZ degradation pathway was proposed by using ultra-performance liquid chromatography and high definition mass spectrometry (UPLC/HDMS). This research provided a meaningful and efficient method for the elimination of pharmaceutical contaminants.

Keywords: Carbamazepine; Degradation pathway; Mechanism; Peroxymonosulfate; Phthalocyanine derivatives.

MeSH terms

Carbamazepine
Drug Residues* / chemistry
Ferrous Compounds
Indoles* / chemistry
Peroxides* / chemistry
Sunlight*

Substances

Ferrous Compounds
Indoles
Peroxides
iron phthalocyanine
peroxymonosulfate
Carbamazepine