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Updated: Aug 30, 2025

Light-driven Enzymatic Decarboxylation
Published on: May 22, 2016
Elimination of bisphenol A with visible light-enhanced peroxydisulfate activation process mediated by
Yan Xiao1, Liangliang Xiong1, Yin Xu2
1Department of Environmental Science and Engineering, School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China.
Abstract:
In recent years, visible light assisted advanced oxidation processes (AOPs) are appealing in the elimination of pollutants. Herein, an innovative and eco-friendly visible light enhanced Fe3+-nitrilotriacetic acid system for the activation of peroxydisulfate (Vis/Fe3+-NTA/PDS) was proposed for the removal of bisphenol A (BPA). Fe3+-NTA could be dissociated through ligand-to-metal charge transfer (LMCT) to realize the generation of Fe2+ for the continuous activation of PDS to remove BPA. The use of 0.10 mM Fe3+, 0.10 mM NTA and 1.00 mM PDS led to 97.5% decay of 0.05 mM BPA and 66.3% of TOC removal in 30 min with the illumination of visible light at initial pH 3.0. The sulfate and hydroxyl radicals were proved to be the dominant species leading to BPA removal by means of radical scavenging experiments, radical probes and electron paramagnetic resonance (EPR) technique. The effects of various operating parameters, natural water constituents as well as different water matrices on BPA abatement were explored. The intermediate products of BPA degradation were identified and a possible transformation pathway was proposed. Briefly, this research provides an attractive strategy for the remediation of refractory wastewater using NTA assisted with visible light in the homogeneous Fe3+/PDS system.
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