NDLI: Effect of different type of scavengers on the photocatalytic removal of copper and cyanide in the presence of TiO$

Content Provider	Springer Nature Link
Author	Zheng, Pei Pan, Zhe Li, Hongying Bai, Bo Guan, Weisheng
Copyright Year	2015
Abstract	Effect of different type of organic or inorganic additions (formic acid, AgNO$_{3}$, NaCl) on the photocatalytic reduction of copper and photooxidation of cyanide with illuminated TiO$_{2}$@yeast was studied in this work together with the impact of solution pH values and contact time. The results indicated that pH values exhibited a great effect on the adsorption and photocatalytic performance of cyanide and copper because the surface charge of the TiO$_{2}$@yeast and the existence form of cyanide and copper are highly pH dependent. The optimal adsorption and photo-oxidation of cyanide was observed at pH 2.0 while the best adsorptive and photocatalytic efficiency for copper was achieved at pH 5.0 within the studied range. The addition of formic acid increased the photo-reduction rate of copper and inhibited the photo-oxidation of cyanide. AgNO$_{3}$, as electron acceptor, restrained the Cu(II) reduction from 75.0 to 30.5 %, whereas accelerate the photo-oxidation of cyanide. Besides, the presence of chloride ions retarded the removal efficiency of both cyanide and copper. The first-order kinetic model well described the experimental data. One possible mechanism of the effect of additives on copper and cyanide degradation was discussed.
Starting Page	6399
Ending Page	6410
Page Count	12
File Format	PDF
ISSN	09574522
Journal	Journal of Materials Science: Materials in Electronics
Volume Number	26
Issue Number	9
e-ISSN	1573482X
Language	English
Publisher	Springer US
Publisher Date	2015-05-26
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical and Electronic Materials Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering

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