Facile preparation of iron oxide doped Fe-MOFs-MW as robust peroxydisulfate catalyst for emerging pollutants degradation

Yongjie Wan; Jinquan Wan; Joe R Zhao; Yan Wang; Ting Luo; Shou Yang; Yaxin Liu

doi:10.1016/j.chemosphere.2020.126798

Facile preparation of iron oxide doped Fe-MOFs-MW as robust peroxydisulfate catalyst for emerging pollutants degradation

Chemosphere. 2020 Sep:254:126798. doi: 10.1016/j.chemosphere.2020.126798. Epub 2020 Apr 17.

Authors

Yongjie Wan¹, Jinquan Wan², Joe R Zhao³, Yan Wang⁴, Ting Luo¹, Shou Yang¹, Yaxin Liu¹

Affiliations

¹ School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
² School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center, Guangzhou, 510640, China. Electronic address: ppjqwan@scut.edu.cn.
³ Tri-Y Environmental Research Institute, 2655 Lillooet St., Vancouver, BC V5M 4P7, Canada.
⁴ School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; Guangdong Plant Fiber High-Valued Cleaning Utilization Engineering Technology Research Center, Guangzhou, 510640, China.

PMID: 32334254
DOI: 10.1016/j.chemosphere.2020.126798

Abstract

A novel catalyst (Fe-MOFs-MW) was facilely synthesized under microwave-assisted with NaOH as modulator for activating peroxydisulfate (PDS). The accelerated nucleation process was confirmed by Johnson-Mehl-Avrami (JMA) model. There were abundant reactive sites on prepared Fe-MOFs-MW while maintaining high Space-Time-Yield value up to 2300 kg/m³·d. Degradation performance of Fe-MOFs-MW as PDS catalyst on sulfamethoxazole (SMX) removal was evaluated. Results indicated that Fe-MOFs-MW with more Fe element anchored (10%) exhibited excellent catalytic capacity for PDS. Besides, the fantastic stability and reusability were confirmed through recycle experiment. After recycled for 4 times, the removal efficiency of SMX and TOC was 88% and 31.3% compared to 98% and 38% without recycling, respectively. An accurate prediction model on the degradation effect with water matrices coexisted was established by response surface methodology (RSM) method. Moreover, SO₄^·-, O₂^·- and ·OH were confirmed as the main reactive species through chemical quenching and EPR tests. The mechanism of Fe-MOFs-MW/PDS process mainly based on electron circulation theory was proposed. As the robust PDS catalyst, facile prepared Fe-MOFs-MW was promising in the treatment of emerging pollutants.

Keywords: Catalytic activity; Fe-MOFs-MW; Modulator; PDS.

MeSH terms

Catalysis
Environmental Pollutants / chemistry*
Ferric Compounds / chemistry*
Iron / chemistry
Recycling
Sulfamethoxazole / chemistry

Substances

Environmental Pollutants
Ferric Compounds
ferric oxide
Iron
Sulfamethoxazole