Assembling CoAl-layered metal oxide into the gravity-driven catalytic membrane for Fenton-like catalytic degradation of pharmaceuticals and personal care products

Muhammad Asif, Hongyu Kang, Zhenghua Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Application of peroxymonosulfate (PMS)-based Fenton-like heterogeneous catalysis in water treatment remains scarce due to mass transfer limitation and poor yield of reactive oxygen species (ROS). Herein, assembling reactive CoAl-layered metal oxide (LMO) into the gravity-driven catalytic membrane was carried out to overcome the inherent limitations. Indeed, compared to the conventional batch reactor (less than 35% removal), the LMO membrane/PMS system achieved effective degradation (94.17%) of the probe chemical ranitidine along with several other selected pharmaceuticals and personal care products (PPCP, >80%). This, as predicted by density functional theory calculations, could be attributed to remarkable activation of PMS by the exposed (001) surfaces and (100) edges of CoAl-LMO, spontaneously generating ROS for PPCP degradation. Electron charge density difference analysis estimated efficient charge accumulation and depletion between PMS and LMO, implying strong interaction and charge transfer in the LMO membrane/PMS system. Notably, ROS quenching experiments and electron paramagnetic resonance spectroscopy confirmed the theoretical findings, which showed that PPCP degradation in the LMO membrane/PMS system is caused by both the radicals (SO4•− + •OH = 51.97%) and nonradicals (1O2 = 20.58%) pathways. The LMO membrane achieved long-term stable performance (>90% removal), and the analysis of the used membrane suggested an increase in the relative distribution of oxygen vacancies or ≡Co–OH species, which is favourable for PMS activation. Overall, this study offers a simple strategy for efficient removal of several PPCPs, which could be applied sustainably in water treatment.
Original languageEnglish (US)
Pages (from-to)142340
JournalChemical Engineering Journal
Volume463
DOIs
StatePublished - Mar 14 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-03-24
Acknowledgements: The research was supported by the National Natural Science Foundation of China (52170041), Tsinghua SIGS Start-up Funding (QD2020002N) and Cross-disciplinary Research and Innovation Fund (JC2022006), Key Research and Development Program of Zhejiang Province (2023C03148) and the Committee of Science and Technology Innovation of Shenzhen (JCYJ20190813163401660).

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

Fingerprint

Dive into the research topics of 'Assembling CoAl-layered metal oxide into the gravity-driven catalytic membrane for Fenton-like catalytic degradation of pharmaceuticals and personal care products'. Together they form a unique fingerprint.

Cite this