Results 191 to 200 of about 3,656,066 (246)

Recovery of uranium (VI) from aqueous solutions by the polyethyleneimine-functionalized reduced graphene oxide/molybdenum disulfide composition aerogels

, 2020
In this work, we have developed a facile route for the fabrication of polyethyleneimine-functionalized reduced graphene oxide/molybdenum disulfide composition aerogels (PEI-rGO/MoS2 CAs).
Dongxuan Guo, Xiumei Song, Lulu Zhang, Weiwen Chen, D. Chu, L. Tan   +5 more
semanticscholar   +1 more source

Oxidation of uranium in steam

Journal of Nuclear Materials, 1994
The steam oxidation rates of U-metal foil and bar stock have been measured thermogravimetrically between 473 and 823 K. Both materials exhibited Arrhenius-type behaviour in their steam oxidation rates below 573–623 K, with activation energies of 46.9 ± 3.3 kJ mol−1 for U foil below 623 K and 58.0 ± 3.8 kJ mol−1 for U bar stock below 573 K.
P.J. Hayward, D.G. Evans, P. Taylor, I.M. George, A.M. Duclos   +4 more
openaire   +1 more source

Uranium(Ⅵ) adsorption from aqueous solutions by microorganism-graphene oxide composites via an immobilization approach

Journal of Cleaner Production, 2019
First fabrication of microorganism-graphene oxide composites for Uranium(VI) adsorption from aqueous solutions was performed via immobilized Lysinibacillus sp. on graphene oxide (GO). Lysinibacillus-GO was characterized using scanning electron microscopy
Changsong Zhao, Jun Liu, Yinhu Deng, Yuanyuan Tian, Guojian Zhang, J. Liao, Jijun Yang, Yuanyou Yang, Ning Liu, Qun Sun   +9 more
semanticscholar   +1 more source

Graphene Oxide and Silver Ions Coassisted Zeolitic Imidazolate Framework for Antifouling and Uranium Enrichment from Seawater

ACS Sustainable Chemistry and Engineering, 2019
Seawater environmental limitation from antifouling due to microorganisms presents a great challenge in uranium extraction from seawater. Herein, a bifunctional graphene oxide-silver ions-zeolitic imidazolate framework-67 composite was successfully ...
Xuejie Guo, Rongrong Chen, Qi Liu, Jingyuan Liu, Hongsen Zhang, Jing Yu, Rumin Li, Milin Zhang, Jun Wang   +8 more
semanticscholar   +1 more source

Uranium Oxide Cleavage

Journal of the American Ceramic Society, 1960
Results of a study of the cleavage of uranium dioxide crystals are presented. Previously a synthesized uranium dioxide crystal was found to have no cleavage. Here it was proven that uranium dioxide was cleaved both mechanicallyand by self-cleavage by controlled oxidation. A Laue x-ray back reflection study revealed cleavage in the {1 1 1} planes.
R. G. ROBINS, P. J. BALDOCK
openaire   +1 more source

Tandem Mass Spectrometry of Uranium and Uranium Oxides in Airborne Particulates

Analytical Chemistry, 1998
A method for detection of uranium in airborne microparticles in real time has been developed. Positive identification of uranium is achieved by isolating UO(2+) ions and following their reaction with residual oxygen molecules to yield UO(2)(+).
R A, Gieray, P T, Reilly, M, Yang, W B, Whitten, J M, Ramsey   +4 more
openaire   +2 more sources

Oxidation states of uranium in depleted uranium particles from Kuwait

Journal of Environmental Radioactivity, 2005
The oxidation states of uranium in depleted uranium (DU) particles were determined by synchrotron radiation based mu-XANES, applied to individual particles isolated from selected samples collected at different sites in Kuwait. Based on scanning electron microscopy with X-ray microanalysis prior to mu-XANES, DU particles ranging from submicrons to ...
Salbu, B., Janssens, K., Lind, O.C., Proost, K., Gijsels, L., Danesi, P.R.   +5 more
openaire   +4 more sources

Certification of the First Uranium Oxide micro-particle reference materials for Nuclear Safety and Security, IRMM-2329P and IRMM-2331P

Journal of Radioanalytical and Nuclear Chemistry, 2022
S. Richter, J. Truyens, C. Venchiarutti, Y. Aregbe, R. Middendorp, S. Neumeier, P. Kegler, M. Klinkenberg, M. Zoriy, G. Stadelmann, Z. Mácsik, A. Koepf, M. Sturm, S. Konegger-Kappel, A. Venzin, L. Sangély, T. Tanpraphan   +16 more
semanticscholar   +1 more source

Thorium Oxide and Uranium Oxide Cleavage

Journal of the American Ceramic Society, 1959
Cleavages of synthetic thorium oxide and uranium oxide crystals were measured on a two-circle optical goniometer in relation to the crystallographic axes as determined by x-ray diffraction. The cleavages of the thorium oxide were found to be good. The uranium oxide subjected to similar investigation was found to have no cleavage. (J.E.D.)
WILLIAM B CAMPBELL, VERNON J. HURST, WILLIS E. MOODY   +2 more
openaire   +1 more source

Preparation of Polydopamine-Modified Graphene Oxide/Chitosan Aerogel for Uranium(VI) Adsorption

Industrial & Engineering Chemistry Research, 2018
The relatively low density of functional groups of graphene oxide (GO) and the difficulty to completely recover after adsorption limit its application in uranium (U(VI)) removal from aqueous solution. Inspired by a special chemical property, polydopamine
Y. Liao, Meng Wang, Dajun Chen
semanticscholar   +1 more source