Results 1 to 10 of about 44,774 (227)

EXAFS study on arsenite(V) adsorption onto goethite and hematite

He jishu, 2021
BackgroundArsenic (As) is one of the most toxic pollutants in the environment. Its adsorption on the surface of iron oxyhydr (oxides) is an important factor affecting its migration and transformation behavior. Goethite and hematite are ubiquitous in soil,
YANG Wang, LIN Jinru, YAO Hui, Yuanming Pan, Emilio Heredia, Roman Chernikov, ZHANG Danni, WANG Shaofeng, JIA Yongfeng   +8 more
doaj   +1 more source

Emergence of the first XAFS/XRF beamline in the Middle East: providing studies of elements and their atomic/electronic structure in pluridisciplinary research fields

Journal of Synchrotron Radiation, 2022
XAFS/XRF is a general-purpose absorption spectroscopy beamline at the Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME), Jordan.
Messaoud Harfouche, Mahmoud Abdellatief, Yazeed Momani, Anas Abbadi, Mohammad Al Najdawi, Mustafa Al Zoubi, Basil Aljamal, Salman Matalgah, Latif U. Khan, Andrea Lausi, Giorgio Paolucci   +10 more
doaj   +1 more source

Wiggler radiation at a low-emittance storage ring and its usage for X-ray absorption spectroscopy

Journal of Synchrotron Radiation, 2022
A wiggler is a high-power insertion device that was used in the past to produce a smooth wide-band X-ray spectrum. It is widely believed that on low-emittance synchrotrons this X-ray source loses its spatial and spectral homogeneity and therefore becomes
Konstantin Klementiev, Hamed Tarawneh, Pedro Fernandes Tavares   +2 more
doaj   +1 more source

Size and structure of hexanuclear plutonium oxo-hydroxo clusters in aqueous solution from synchrotron analysis

Journal of Synchrotron Radiation, 2022
The size and shape of a water-soluble hexanuclear plutonium cluster were probed by combining synchrotron small-angle X-ray scattering (SAXS) and extended X-ray absorption fine structure (EXAFS).
Thomas Dumas, Matthieu Virot, Denis Menut, Christelle Tamain, Cyril Micheau, Sandrine Dourdain, Olivier Diat   +6 more
doaj   +1 more source

The Influences of Magnesium upon Calcium Phosphate Mineral Formation and Structure as Monitored by X-ray and Vibrational Spectroscopy

Soil Systems, 2020
Calcium phosphate minerals are typically the solubility-limiting phase for phosphate in calcareous soils. Magnesium (Mg), despite being present in high concentrations in calcareous soils, has been largely neglected in the study of formation and ...
David M. Hilger, Jordan G. Hamilton, Derek Peak   +2 more
doaj   +1 more source

Coupling between γ-irradiation and synchrotron-radiation-based XAFS techniques for studying Mn-doped ZnO nanoparticles

Journal of Synchrotron Radiation, 2022
γ-Irradiation and synchrotron-radiation-based X-ray absorption fine-structure (XAFS) spectroscopy have been used to induce structure disorder through the interaction of γ-rays (200 kGy) with fabricated Mn-doped ZnO nanoparticles (NPs) and then to examine
N. G. Imam, Messaoud Harfouche, A. A. Azab, S. Solyman   +3 more
doaj   +1 more source

From EXAFS of reference compounds to U(VI) speciation in contaminated environments

Journal of Synchrotron Radiation, 2022
Understanding the speciation of technogenic uranium in natural systems is crucial for estimating U migration and bioavailability and for developing remediation strategies for contaminated territories.
Anna Krot, Irina Vlasova, Alexander Trigub, Alexey Averin, Vasily Yapaskurt, Stepan Kalmykov   +5 more
doaj   +1 more source

Extended X-Ray Absorption Fine Structure of ZrW2O8: Theory vs. Experiment

Frontiers in Chemistry, 2018
Extended x-ray absorption fine structure (EXAFS) is well-suited for investigations of structure and disorder of complex materials. Recently, experimental measurements and analysis of EXAFS have been carried out to elucidate the mechanisms responsible for
Fernando D. Vila, John W. Spencer, Joshua J. Kas, John J. Rehr, Frank Bridges   +4 more
doaj   +1 more source

Characterization of nanoparticle electrocatalysts using X-ray absorption spectroscopy

Zaštita Materijala, 2015
X-ray absorption spectroscopy (XAS) is a non-destructive spectroscopic technique commonly used with synchrotron radiation source and measures the changes of absorption coefficient as the function of the x-ray energy.
Nebojša Marinković, Radoslav R. Adžić   +1 more
doaj   +1 more source

EXAFS study of nickel tetracarbonyl and nickel clusters in zeolite Y [PDF]

, 1986
Adsorption and thermal decomposition of Ni(CO)4 in the cage system of zeolite Y have been studied with EXAFS, electron microscopy and IR spectroscopy , Ni(CO)4 is adsorbed as an intact molecule in both cation - free zeolite Y and NaY. Symmetry changes
Bein, Thomas, McLain, S. J., Möller, Karin, Sayers, D. E., Stucky, Galen D., Woolery, G.   +5 more
core   +3 more sources