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| http://dx.doi.org/10.1289/ehp.114-a656 | DOI Listing |
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Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53706, United States.
Scaffolding catalytic reactions within porous materials is a powerful strategy to enhance the reaction rates of multicatalytic systems. However, it remains challenging to develop materials with high porosity, high diversity of functional groups within the pores, and guest-adaptive tunability. Furthermore, it is challenging to capture large catalysts such as enzymes within porous materials.
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Chemosphere
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Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585, Singapore. Electronic address:
Aniline, a common pollutant in industrial wastewater, requires an effective treatment method with minimal chemical usage. In this study, a two-stage catalytic oligomerization process has been developed to address this issue by converting soluble aniline into insoluble oligomers for wastewater treatment. In the first stage, aniline is oxidized using hydrogen peroxide (HO) and a green catalyst, iron tetraamido macrocyclic ligand (Fe-TAML) to form aniline tetramers or pentamers.
View Article and Find Full Text PDFAmperometry for real-time and on-site monitoring of phenol and HO during the treatments.
Anal Chim Acta
March 2024
Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineerin Drive 4, 117576, Singapore. Electronic address:
In conventional wastewater treatment processes, a predetermined quantity of chemicals is introduced at the onset, without ongoing monitoring of the treatment progress. Thus, it is difficult to perform timely intervention in the treatment process. Herein, we develop an amperometry-guided wastewater treatment strategy based on a green oxidation process with HO and an iron-tetraamidomacrocyclic ligand (Fe-TAML) catalyst.
View Article and Find Full Text PDF[Preparation of Catalyst Cyclodextrin-Fe-TAML to Activate HO and Oxidize Organic Micropollutants in Water].
Huan Jing Ke Xue
July 2023
Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
In order to improve the stability and catalytic activity of Fe-TAML, mono-6-oxy-cyclodextrin bonded Fe-TAML catalyst (CD-Fe-TAML) was prepared by bonding Fe-TAML with cyclodextrin (CD) through chlorosulfonylation reaction, metal chelation reaction, and nucleophilic substitution reaction. The catalytic activity and stability of CD-Fe-TAML and the oxidation degradation efficiencies of 34 organic micropollutants such as antibiotics and pesticides by activation of HOin water were studied. Compared with that of Fe-TAML, CD-Fe-TAML at pH 7.
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Environ Sci Technol
February 2023
UNSW Water Research Centre, School of Civil and Environmental Engineering, University of New South Wales, Sydney, NSW2052, Australia.
Iron complexes of tetra-amido macrocyclic ligands (Fe-TAML) are recognized to be effective catalysts for the degradation of a wide range of organic contaminants in homogeneous conditions with the high valent Fe(IV) and Fe(V) species generated on activation of the Fe-TAML complex by hydrogen peroxide (HO) recognized to be powerful oxidants. Electrochemical activation of Fe-TAML would appear an attractive alternative to HO activation, especially if the Fe-TAML complex could be attached to the anode, as this would enable formation of high valent iron species at the anode and, importantly, retention of the valuable Fe-TAML complex within the reaction system. In this work, we affix Fe-TAML to the surface of carbon black particles and apply this "suspension anode" process to oxidize selected target compounds via generation of high valent iron species.
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