Simultaneous Removal of Toxic Cyanide and Cu(II) Ions from Wastewater by a Bi-functional Raspberry-like TiO2@yeast Microspheres

A novel strategy for simultaneous removal of cyanide anions and copper cations was proposed. Firstly, TiO @yeast hybrid microspheres with raspberry-like structure were fabricated by a facile hydrolysis method using titanium tetrachloride as Ti precursor. The physicochemical properties of the as-prep...

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Bibliographic Details
Published in:Journal of advanced oxidation technologies 2015-07, Vol.18 (2), p.175-184
Main Authors: Li, Hong-Ying, Bai, Bo, Jing, Deng-Wei, Ding, Chen-Xu, Wang, Hong-Lun, Suo, You-Rui
Format: Article
Language:English
Subjects:
Bio-adsorption
Hybrid materials
Photocatalysis
Synergistic mechanism
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Summary:A novel strategy for simultaneous removal of cyanide anions and copper cations was proposed. Firstly, TiO @yeast hybrid microspheres with raspberry-like structure were fabricated by a facile hydrolysis method using titanium tetrachloride as Ti precursor. The physicochemical properties of the as-prepared samples were fully characterized. The bi-functional composites were then employed for the simultaneous removal of a typical mixture of cyanide and copper metal ions via bio-adsorption in dark and photo-catalysis under UV irradiation. The results showed that the satellitic TiO nanoparticles within the TiO @yeast raspberry-like structure functioned as the photocatalytic active sites providing the electron/hole pairs, while the yeast cores worked as the adsorbent to capture the cyanide and copper ions onto the photocatalytic active sites. The synergistic effects of the bio-adsorption by yeast and photo-catalysis by the TiO nanoparticles over the bi-functional composites were demonstrated. Our results are expected to be of significant value for various environmental friendly applications.
ISSN:1203-8407
2371-1175
DOI:10.1515/jaots-2015-0201