Document Type

Journal Article

Department/Unit

Department of Geography

Title

Application of a novel semiconductor catalyst, CT, in degradation of aromatic pollutants in wastewater: Phenol and catechol

Language

English

Abstract

Water-soluble phenol and phenolic compounds were generally removed via advanced oxidation processes. A novel semiconductor catalyst, CT, was the first-time employed in the present study to degrade phenol and catechol. The phenolic compounds (initial concentration of 88 mg L-1) were completely mineralized by the CT catalytic nanoparticles (1%) within 15 days, under acidic condition and with the presence of mild UV radiation (15 w, the emitted wavelength is 254 nm and the light intensity <26 μw/cm 2). Under the same reaction condition, 1% TiO2 (mixture of rutile and anatase, nanopowder, <100 nm) and H2O2 had lower removal efficiency (phenol: <42%; catechol: <60%), whereas the control (without addition of catalysts/H2O2) only showed <12% removal. The processes of phenol/catechol removal by CT followed pseudo-zero-order kinetics. The aromatic structures absorbed the UV energy and passed to an excited state, which the CT worked on. The pollutants were adsorbed on the CT's surface and oxidized via charge-transfer and hydroxyl radical generation by CT. Given low initial concentrations, a circumstance encountered in wastewater polishing, the current set-up should be an efficient and less energy- and chemical-consumptive treatment method. © 2014 Xiao Chen et al.

Publication Date

2014

Source Publication Title

Journal of Nanomaterials

Volume

2014

Start Page

1

End Page

10

Publisher

Hindawi Publishing Corporation

DOI

10.1155/2014/524141

Link to Publisher's Edition

http://dx.doi.org/10.1155/2014/524141

ISSN (print)

16874110

ISSN (electronic)

16874129

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