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Papers |
First Author: |
CHEN Yi-Ping |
Abstract: |
In this study, a highly active electro-Fenton catalyst, spongy zero-valent iron (ZVI), has been developed at first via in-situ synthesis of ZVI nanoparticles (NPs) on an electrospun three-dimensional (3D) nanofiber network. The spongy ZVI effectively overcame the defects of easy aggregation of ZVI NPs and ferric sludge accumulation during the electro-catalytic process. Then, a three-dimensional electro-Fenton (3D-EF) system using the as-fabricated spongy ZVI as particle catalytic electrodes was designed, which presented a significant synergistic effect of adsorption and electro-catalytic oxidation on the enhanced removal of a widely used antibiotic, sulfathiazole (STZ) from water. Adsorption experiments demonstrated that the spongy ZVI had a relative high adsorption affinity towards STZ with about 50% of the total removal within 240 min, and the adsorption equilibrium was reached in 570 min. Hydroxyl radical (.OH) was produced in the 3D-EF system with spongy ZVI catalyst, and almost 100% STZ was removed within 5 min. Reactive oxygen species analysis verified that OH was mainly responsible for the STZ degradation. Based on intermediates identified by a liquid chromatography-tandem mass spectrometry (LC–MS/MS), three pathways for the electro-Fenton oxidative degradation of STZ were proposed. |
Contact the author: |
ZHENG Yu-Ming |
Page Number: |
576–585 |
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PubYear: |
June 2019 |
Volume: |
371 |
Publication Name: |
JOURNAL OF HAZARDOUS MATERIALS |
The full text link: |
https://doi.org/10.1016/j.jhazmat.2019.03.043 |
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