An x-ray absorption spectroscopy study of Cd binding onto a halophilic archaeon

16th International Conference on X-ray Absorption Fine Structure

Showalter, Allison R.^1 ; Szymanowski, Jennifer E.S.^2 ; Fein, Jeremy B.^2 ; Bunker, Bruce A.^1

Department of Physics, University of Notre Dame, Notre Dame

IN

46566, United States^1

Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame

IN

46566, United States^2

关键词: Cadmiums (Cd);    Cd adsorptions;    Most likely;    New Mexico;    Sulfhydryl;    Toxic metals;    Transuranic waste;    Waste isolation pilot plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012079/pdf
DOI  :  10.1088/1742-6596/712/1/012079

来源: IOP

【 摘 要 】

X-ray absorption spectroscopy (XAS) and cadmium (Cd) isotherm experiments determine how Cd adsorbs to the surface of halophilic archaeon Halobacterium noricense. This archaeon, isolated from the Waste Isolation Pilot Plant (WIPP) near Carlsbad, New Mexico could be involved with the transport of toxic metals stored in the transuranic waste in the salt mine. The isotherm experiments show that adsorption is relatively constant across the tolerable pH range for H. noricense. The XAS results indicate that Cd adsorption occurs predominately via a sulfur site, most likely sulfhydryl, with the same site dominating all measured pH values.