干旱区生态环境知识资源中心(Arid): Investigations of the Fundamental Surface Reactions Involved in the Sorption and Desorption of Radionuclides

Arid

DOI	10.2172/1012469
报告编号	DOEER46295
来源ID	OSTI_ID: 1012469
	Investigations of the Fundamental Surface Reactions Involved in the Sorption and Desorption of Radionuclides
	Czerwinski, Ken; Heske, Clemens; Moser, Duane; Misra, Mnoranjan; McMillion, Glen
英文摘要	Models for describing solution- and surface-phase reactions have been used for 30 years, but only recently applicable to complex surfaces. Duff et al., using micro-XANES, found that Pu was concentrated on Mn-oxide and smectite phases of zeolitic tuff, providing an evaluation of contaminant speciation on surfaces for modeling. Experiments at Los Alamos demonstrated that actinides display varying surface residence time distributions, probably reflective of mineral surface heterogeneity. We propose to investigate the sorption/desorption behavior of radionuclides from mineral surfaces, as effected by microorganisms, employing isolates from Nevada Test Site deep alluvium as a model system. Characterizations will include surface area, particle size distribution, x-ray diffraction (XRD), microprobe analysis, extractions, and microbiology. Surface interactions will be assessed by electron spectroscopy (XPS), x-ray absorption fine structure spectroscopy (XAFS), X-ray emission spectroscopy, transmission electron microscopy (TEM) and Scanning electron microscopy (SEM). Desert Research Institute (DRI), University of Nevada, Reno (UNR), and University of Nevada, Las Vegas (UNLV) researchers will collaborate to enhance scientific infrastructure and the understanding of contaminant behavior on surfaces, with broader implications for the management of DOE sites.
出版年	2011
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	07 ISOTOPES AND RADIATION SOURCES ; ABSORPTION ; ACTINIDES ; DESORPTION ; DISTRIBUTION FUNCTIONS ; ELECTRON SPECTROSCOPY ; EMISSION SPECTROSCOPY ; FINE STRUCTURE ; MICROORGANISMS ; NEVADA TEST SITE ; PARTICLE SIZE ; RADIOISOTOPES ; RESIDENCE HALF-TIME ; SCANNING ELECTRON MICROSCOPY ; SMECTITE ; SORPTION ; SPECTROSCOPY ; SURFACE AREA ; TRANSMISSION ELECTRON MICROSCOPY ; TUFF ; X-RAY DIFFRACTION ; X-RAY PHOTOELECTRON SPECTROSCOPY radionuclides, sorption, desorption, bacteria, modeling, geochemical, microscopy, groundwater
URL	http://www.osti.gov/scitech/servlets/purl/1012469
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/270220
推荐引用方式 GB/T 7714	Czerwinski, Ken,Heske, Clemens,Moser, Duane,et al. Investigations of the Fundamental Surface Reactions Involved in the Sorption and Desorption of Radionuclides,2011.