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Researchers from Shanghai Institute of Applied Physics Discuss Findings in Nanomaterials

February 18, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators discuss new findings in Nanomaterials. According to news reporting from Shanghai, People's Republic of China, by NewsRx journalists, research stated, "Arsenic removal using nanomaterials has attracted increasing attention worldwide, whereas the potential release of As from spent nanomaterials to groundwater in reducing environments is presently underappreciated. This research investigated the fate of As(V) adsorbed on nano-TiO2 in the presence of sulfate reducing bacteria (SRB) Desulfovibrio vulgaris strains DP4 and ATCC 7757."

The news correspondents obtained a quote from the research from the Shanghai Institute of Applied Physics, "The incubation results demonstrated that As(V) was desorbed from nano TiO2, and subsequently reduced to As(III) in aqueous solution. The release of adsorbed As(V) was two to three times higher in biotic samples than that in abiotic controls. Reduction of As(V) to As(III) in biotic samples was coupled with the conversion of sulfate to sulfide, while no As(III) was observed in abiotic controls. STXM results provided the direct evidence of appreciable As(III) and As(V) on TiO2. XANES analysis indicated that As(V) was the predominant species for three As loads of 150, 300, and 5700 mg/g, whereas 15-28% As precipitated as orpiment for a high As load of 5700 mg/g."

According to the news reporters, the research concluded: "In spite of orpiment formation, As mobilized in higher amounts in the SRB presence than in abiotic controls, highlighting the key role of SRB in the fate of As in the presence of nanomaterials."

For more information on this research see: Fate of Arsenate Adsorbed on Nano-TiO2 in the Presence of Sulfate Reducing Bacteria. Environmental Science & Technology, 2013;47(19):10939-10946. Environmental Science & Technology can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Environmental Science & Technology -

Our news journalists report that additional information may be obtained by contacting T. Luo, Chinese Academy Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201214, People's Republic of China. Additional authors for this research include H.X. Tian, Z. Guo, G.Q. Zhuang and C.Y. Jing (see also Nanomaterials).

Keywords for this news article include: Asia, Anions, Shanghai, Arsenates, Arsenicals, Nanotechnology, Emerging Technologies, People's Republic of China

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Source: Life Science Weekly

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