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Peng Y.,South China University of Technology | Zhu N.,South China University of Technology | Zhu N.,The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Edu | Nie H.,South China University of Technology
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2013

Electrogens is key to boost a microbial fuel cell (MFC). Based on isolation-MFC electricity-generating experiment method, an electrogenic bacterium was isolated from the anodic biofilm of a MFC that was inoculated with aerobic sewage sludge. The electrogenic bacterium was labeled as Z6. The 16S rDNA sequence of Z6 had 100% similarity with known strain Klebsiella oxytoca An16-2. By the consideration of physiological and morphological characteristics, the strain Z6 was preliminarily identified as a member of Klebsiella genus. The electricity-generating results of the MFC inoculated with strain Z6 showed that the maximum power density and internal resistance was 14.35 W·m-3 and 400 Ω, respectively, when citrate was used as the substrate. It was demonstrated that strain Z6 had a relative high electrochemical activity. It can be inferred from the results of cyclic voltammetry analysis and exo-AQDS adding experiment that strain Z6 may transfer electrons through excreting mediators. Source


Lan Y.,South China University of Technology | Lan Y.,The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Edu | Luo H.,South China University of Technology | Luo H.,The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Edu | And 6 more authors.
Microchimica Acta | Year: 2012

A glassy carbon electrode (GCE) was modified by casting gold-palladium (Au-Pd) nanoparticles onto its surface and then used for the determination of As(III) by stripping voltammetry. The structure and electrochemical properties of the nanoparticles were characterized by UV-vis spectroscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and cyclic voltammetry. Anodic stripping voltammetry of the modified electrode was performed in solutions of pH 4. 5 containing various concentrations of arsenite. The modified GCE exhibited good response towards As(III), with a limit of detection of around 0. 25 ppb which is much lower than the current EPA standard of 10 ppb. The electrode is stable and not interfered by Pb(II), Cd(II), Mn(II), and Zn(II). © 2012 Springer-Verlag. Source


Wu C.D.,South China University of Technology | Wu C.D.,The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Edu | Zhang J.Y.,South China University of Technology | Zhang J.Y.,The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters of Ministry of Edu | And 3 more authors.
Desalination and Water Treatment | Year: 2014

The combination of sonolysis and photocatalysis has been used to degrade an aqueous solution of phenol. The synergistic index for sonophotocatalysis was 1.06, indicating that there was a slightly synergistic effect between sonolysis and photocatalysis, and that the degradation by sonolysis, photocatalysis, and sonophotocatalysis presented a good fit to the pseudo-first-order kinetic model. Additionally, the effects of parameters such as the initial pH value of the solution, dissolved gases, salt addition, Fe3+ ions, and metaloxide (CuO and MnO2) on the sonophotocatalytic degradation were studied. The results shown that acidic/weakly acidic condition is superior to alkaline condition, and higher concentration of dissolved oxygen and the presence of Fe3+ favored the phenol degradation, CuO and MnO2 had no significant effect on the degradation, while NaHCO3 restrained the degradation rate. © 2013 Balaban Desalination Publications. All rights reserved. Source


Liu Y.,South China University of Technology | Ooyang J.,South China University of Technology | Wang L.,South China University of Technology | Su Y.,South China University of Technology | And 12 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2012

Ag-base catalysts supported on Al 2O 3 and TiO 2-Al 2O 3 (the mass ratio of TiO 2 to Al 2O 3 was 1 :10) were prepared by sol-get method respectively. The catalysts were characterized by N 2 physisorption, NO x/SO 2-TPD, FT-IR and DRIFTs measurements. The effect of SO 2 on the selective reduction of NO x by propene over the catalysts and the poisoning mechanism were investigated. The results showed that the catalytic activities under the low-medium temperature and the resistance of sulfur poisoning at 400 °C were enhanced after addition of 10% TiO 2.The formation of formate resulted from the introduction of TiO 2 was in favor of the reaction at low temperature, and the competitive adsorption of NO and SO 2 and the formation of silver sulfate were proved to be the main reason for deactivation of 4%Ag/Al 2O 3 catalyst. The addition of TiO 2 could not only improve the adsorption of NO and inhibit the adsorption of SO 2 on catalyst surface, but also inhibit the sulfation of Ag during the catalytic process, which could enhance sulfur poisoning performance of the catalysts eventually. Source

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