In Situ Characterization of Superficial Organic Composition Changes of Thermoacidophilic Archaea Acidianus manzaensis YN-25 in Response to Energy Substrate

Li Zhu Liu; Xuan Pan; Xu Xia; Yu Hang Zhou; Zhen Yuan Nie; Jin Lan Xia

doi:10.4028/www.scientific.net/SSP.262.417

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HomeSolid State PhenomenaSolid State Phenomena Vol. 262In Situ Characterization of Superficial Organic...

In Situ Characterization of Superficial Organic Composition Changes of Thermoacidophilic Archaea Acidianus manzaensis YN-25 in Response to Energy Substrate

Abstract:

The differences of superficial (about 10 nm) extracellular polymeric substances (EPS) composition of thermoacidophilic archaea Acidianus manzaensis YN-25 acclimated with different energy substrates (FeS₂, CuFeS₂, S⁰, FeSO₄) were analyzed in situ for the first time by synchrotron radiation (SR) based carbon K-edge X-ray absorption near edge structure (XANES) spectroscopy. The results showed that there are clear associations between the energy substrates and the changes in organic composition in terms of typical function groups (-C=O, -C-O and -C-N). The archaea acclimated with chalcopyrite and pyrite contain higher proportion of proteins but less polysaccharides compared to cells acclimated with S⁰.The archaea acclimated with FeSO₄ contains the highest proportion of protein which is positively associated with the iron oxidation process, while archaea acclimated with S⁰ contains more lipids and polysaccharides, which may be favorable to the hydrophobic S⁰ adsorption and utilization processes.

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Solid State Phenomena (Volume 262)

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417-420

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https://doi.org/10.4028/www.scientific.net/SSP.262.417

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Online since:

August 2017

Authors:

Li Zhu Liu, Xuan Pan, Xu Xia, Yu Hang Zhou, Zhen Yuan Nie, Jin Lan Xia*

Keywords:

Bioleaching, Extracellular Polymeric Substances (EPS), Thermophile, XANES

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