Efficient removal of neonicotinoid by singlet oxygen dominated MoSx/ceramic membrane-integrated Fenton-like process

Qiuying Yi; Yang Li; Ruobin Dai; Xuesong Li; Zhouyan Li; Zhiwei Wang

doi:10.1016/j.jhazmat.2022.129672

Efficient removal of neonicotinoid by singlet oxygen dominated MoS_x/ceramic membrane-integrated Fenton-like process

J Hazard Mater. 2022 Oct 5:439:129672. doi: 10.1016/j.jhazmat.2022.129672. Epub 2022 Jul 26.

Authors

Qiuying Yi¹, Yang Li¹, Ruobin Dai², Xuesong Li¹, Zhouyan Li¹, Zhiwei Wang³

Affiliations

¹ State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
² State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. Electronic address: dairuobin@tongji.edu.cn.
³ State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Institute of Pollution Control and Ecological Security, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Tongji Advanced Membrane Technology Center, Shanghai 200092, China. Electronic address: zwwang@tongji.edu.cn.

PMID: 36104901
DOI: 10.1016/j.jhazmat.2022.129672

Abstract

Removal of neonicotinoids (NEOs) from contaminated water is of great importance for both ecological environment and human health. However, conventional Fenton process might be insufficient for NEOs removal due to short lifetime for generated HO^• and limited Fe³⁺/Fe²⁺ redox cycle. Advancing Fenton process to produce singlet oxygen can be an effective route to improve its efficacy for NEOs removal. Herein, we developed a molybdenum sulfide modified ceramic membrane-integrated Fenton-like system to achieve efficient catalytic removal of NEOs. The reduced Mo⁰ and Mo⁴⁺ could promote the reduction process of Fe³⁺ to Fe²⁺, improving the activation efficiency of hydrogen peroxide (H₂O₂) and the generation of superoxide radical (O₂^•-). Consequently, the coexisting Mo⁶⁺ reacted with O₂^•- to generate ¹O₂. The membrane enabled the pollutants to adequately contact oxidants due to the enhanced convective mass transfer. The functionalized membrane exhibited stable catalytic performance for clothianidin (CLO, a kind of NEOs, 10 mg/L) removal (degradation efficiency > 85%). The presence of ¹O₂ enabled the dechlorination and hydroxylation of CLO and thus reduced the toxicity of wastewater. Our work sheds light on the use of functionalized ceramic membrane integrated catalytic Fenton system for effective environmental remediation.

Keywords: Fenton-like process; Functionalized ceramic membrane; Molybdenum sulfide; Singlet oxygen; Water purification.

Publication types

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

MeSH terms

Ceramics
Humans
Hydrogen Peroxide*
Iron
Neonicotinoids
Singlet Oxygen*

Substances

Neonicotinoids
Singlet Oxygen
Hydrogen Peroxide
Iron