Last edited by Meshakar
Tuesday, April 28, 2020 | History

2 edition of Uptake of fission products onto clay minerals. found in the catalog.

Uptake of fission products onto clay minerals.

Ibrahim Musa Umar

Uptake of fission products onto clay minerals.

  • 69 Want to read
  • 9 Currently reading

Published by University of Salford in Salford .
Written in


Edition Notes

PhD thesis, Chemistry and Applied Chemistry.

SeriesD75119/87
ID Numbers
Open LibraryOL20309550M

The book is addressed to any researcher whishing sound knowledge about the properties of matter, be it a chemist, a physicist, a medical doctor, a mineralogist or a biologist. They will all find it a valuable source of information about the principles and applications of . Impact of transport pathways in radium accumulation under groundwater discharge areas. Poster at the International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere. () Migration, Barcelona, Spain, September 11 – Colàs, E., Campos, I., Madé, B., Grivé, M. Kinetic data in batch reactors are generally represented by empirical models neglecting mass transfer effects (pseudo-first and pseudo-second-order models), while F. Pagnanelli () Department of Chemistry, Sapienza University of Rome, A. Moro 5, Rome, Italy e-mail: [email protected] P. Kotrba et al. (eds.), Microbial Biosorption of.


Share this book
You might also like
literature of American music

literature of American music

Popular opinion

Popular opinion

When your child is sick.

When your child is sick.

Hot Italian dish

Hot Italian dish

Lifelong learning part I

Lifelong learning part I

The continent of Asia

The continent of Asia

Poems for Reflection

Poems for Reflection

Tricksterism in turn-of-the-century American literature

Tricksterism in turn-of-the-century American literature

Russell A. McKinley.

Russell A. McKinley.

Caribbean Crafts Circle register of artists, 1985-86.

Caribbean Crafts Circle register of artists, 1985-86.

Statistics at square one

Statistics at square one

Deflasking trimming and polishing of dentures. (Videotape)

Deflasking trimming and polishing of dentures. (Videotape)

Standing rules and regulations of the Legislative Assembly of Canada

Standing rules and regulations of the Legislative Assembly of Canada

Frontiers of economics

Frontiers of economics

Horses, jockeys & crooks

Horses, jockeys & crooks

The Jacobs ladder

The Jacobs ladder

Uptake of fission products onto clay minerals. by Ibrahim Musa Umar Download PDF EPUB FB2

A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.

Schnurr et al. [43] examined europium sorption onto clay minerals at nearly saturated saline solutions while Ams et al.

[2] investigated neptunium. Bors J, Dultz S, Riebe B () Organophilic bentonites as adsorbents for radionuclides: I. Adsorption of ionic fission products. Appl Clay Sci –13 CrossRef Google Scholar Boyd SA, Jaynes WF () Role of layer charge in organic contaminant sorption by by: @article{osti_, title = {Bioreduction of Fe-bearing clay minerals and their reactivity toward pertechnetate (Tc)}, author = {Bishop, Michael E and Dong, Hailiang and Kukkadapu, Ravi K and Liu, Chongxuan and Edelmann, Richard E}, abstractNote = {99Technetium (99Tc) is a fission product of uranium and plutonium and poses a high environmental hazard.

The distribution coefficients for M(III)/Na(I) exchange on kaolinite, montmorillonite, and attapulgite were measured, where M(III) = Am, Cm, Cf, Es, La, Sm, and Yb. These studies were made in support of radioactive waste isolation in geologic deposits. (LK. The sorption of Cs + onto raw Kutch clay (India) over a wide range of concentrations and pH levels was studied and compared with its sorption onto the well-studied FEBEX clay (Spain).

The principal clay mineral in both samples is montmorillonite. Non-linear sorption isotherms were measured for both clays.

The shapes of the isotherms prompted the Cited by: 6. Iodine is an environmentally important radionuclide with a half life of ×10 7 y. The three main sources of I in the environment are nature, nuclear weapons testing and power reactor operation. NAA is usually carried out by measuring the ratio of I to I after neutron activation by the following nuclear reactions with reactor neutrons.

Thorium and protactinium are decay products of fuel. Uranium comes from neutron activation of a decay product of uranium. Neptunium, plutonium, americium, and curium come from successive neutron absorption of fuel. When uranium is struck with a neutron sometimes it fission and sometimes becomes a new nuclide.

09/ 12th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere, Kennewick (USA): Marques Fernandes, M., Baeyens, B., Bradbury, M.H., “The influence of carbonate complexation on.

Abstract. Strontium abundantly occurs in nature in the rocks and soils in the form of sulfate and carbonate minerals, i.e., celestite (SrSO 4) and strontianite (SrCO 3), in nonradioactive and nontoxic r, a small amount of strontium as radioactive 90 Sr has been contributed to the geo-environment by the anthropogenic activities of nuclear testing and fission Author: Susmita Sharma.

The uptake into shoot tissue by tumbleweed from solution cultures was slightly less than for bean, barley or tomato. In Cummings and Bankert used pot culture to compare the uptake by plants of Pu from nine different soils.

Plutonium uptake was found to be 7 X 10~6% to X 10~6% of plutonium applied. Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents and catalysts. The term zeolite was originally coined in by Swedish mineralogist Axel Fredrik Cronstedt, who observed that rapidly heating the material, believed to have been stilbite, produced large amounts of steam from water that had been adsorbed by the material.

Radioactive wastes are generated during nuclear fuel cycle operation, production and application of radioisotope in medicine, industry, research, and agriculture, and as a byproduct of natural resource exploitation, which includes mining and processing of ores, combustion of fossil fuels, or production of natural gas and oil.

To ensure the protection of human health and the Cited by: Zeolites are excellent sorbents of fission products that otherwise exhibit very low affinity for sorption on solid surfaces (such as Cs and Sr isotopes [78, 80].

Clay minerals (montmorillonite, vermiculite) are layered aluminosilicates, in which ion-exchange is typically associated with cations situated in clay mineral by: 3. The final composition of the fuel is typically 96% UO 2, 3% fission products and 1% PuO 2, but this can vary depending on the 'burn-up'—the amount of fission experienced—of the fuel.

Owing to a steep thermal gradient between the centre (~ °C) and the outer rim (~ °C) of the fuel pellet, volatile fission products, including Cs and I.

In contrast to ion exchange by other clay minerals, exchange by goethite occurred between protons of the positively charged inner part of the electric doable layer and metal cations in the solution; one proton exchanged for about one divalent cation.

One month after the nuclear meltdown in Fukushima, the absorbed radiation level in plants 35 km away was 10 times higher than that in the soil. As a primary means of long-range migration of pollutants into the plants, foliar uptake is also crucial to the “sink” mechanism of pollutants and the safety of agricultural products [8,9,10].Author: Yungui Li, Xiang Luo, Xueying Bai, Wenxuan Lv, Yang Liao.

Sorption onto selected clay minerals has been studied and is recommended as a means of solution decontamination, under certain conditions. The differences in composition between marine sediments and the solids carried to sea by rivers is attributed to exchange and sorp- tion reactions between the solids and dissolved substances during sedi.

EVALUATION OF SORPTION BEHAVIOR OF SELENIDE ONTO MONTMORILLONITE: Migration (16th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere) Barcelona (Spain) P.C.M.

Francisco, S. Mitsui, T. Ishidera and Y. Tachi. The high stability of U(IV) minerals in reducing environments means that the fission products are retained within the structure of the uraninite. Other important factors that kept the uranium and radionuclides preserved on these sites include the geological stability of the Frenceville Basin and the low permeability of the rocks enclosing the.

Different foods can cause severe inflammation in the body and different foods can also drastically reduce inflammation in the body.

My test showed that I had an intolerance to 26 different foods including nuts such as almonds, Brazil, hazelnuts and peanuts. Also broccoli, white cabbage, sunflower seeds, chicken eggs and a range of dairy products.

Chemistry and thermodynamics of actinides and fission products in trivalent actinide sorption onto clay minerals under there is a high uptake (>%) of uranium sorbed onto the illite du Puy in the environmentally most relevant pH range ( File Size: 14MB. Modeling the Sorption of Ni(II), Am(III), Th(IV), Np(V), U(VI) and Se(IV) on Clay Minerals and Bentonite: Migration (12th International Conference on the Chemistry and Migration Behaviour of Actinides and Fission Products in the Geosphere) Kennewick(USA) K.

Fujiwara, Y. Kohara, M. Okazaki and Y. Suzuki. This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Geochemistry of Soil Radionuclides Peng-Chu Zhang, Peng-Chu Zhang, Michael V.

Brady Recurring concerns about the environmental fate and potential health impacts of radionuclides continue to focus interest on understanding the mechanisms controlling their transport in soils and their biological availability.

atomic scale the mechanisms of radionuclide sorption onto clay minerals and to explore the migration Our study evidences the important role of clay minerals as alteration products of silicate glasses and gate the uptake mechanisms of selected metals representing fission products on clays and other miner-als present in the host rock.

A pore-level direct numerical investigation of water evaporation characteristics under air and hydrogen in the gas diffusion layers of polymer electrolyte fuel cells Safi Mohammad Amin, Mantzaras John, Prasianakis Nikolaos I, Lamibrac Adrien, Buchi Felix N INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER().

DOI:. Sulfide oxidation and leaching of ore deposits in the weathering environment, and any attendant secondary sulfide enrichment, are supergene processes (Ransome, ), implying that they are products of descending aqueous solutions of surface cations and sulfate anions are released through oxidative weathering of sulfide minerals in the aerated or vadosEzone.

Reactive Transport of Iodide in Clay Minerals: Experimental and Modeling Efforts. The th Annual American Chemical Society, March 28–April 1,Anaheim, CA. Hu, Q.H. and D.K. Smith. Field-scale Migration of 99Tc and I at the Nevada Test Site. Materials Research Society Spring Meeting, April 12–16,San Francisco, CA.

Hu, Q. Chapter 1: Biology. Introduction to Biology. Biology is the study of living things. It encompasses the cellular basis of living things, the energy metabolism that underlies the activities of life, and the genetic basis for inheritance in organisms.

AbstractPoly(glycidyl methacrylate) (PGMA) microspheres were prepared by radiation induced polymerization of glycidyl methacrylate (GMA) monomer. The factors affecting the degree of polymerization and yield (%) of PGMA such as type of solvent, monomer concentration, and irradiation dose were investigated.

It was found that the PGMA yield (%) Cited by: 4. We investigated the adsorption of Tl+ onto purified Illite du Puy (IdP). Distribution coefficients (Kd) for trace Tl adsorption indicated a moderate pH-dependence from pH to Adsorption isotherms measured at Tl+ concentrations from 10–9 to 10–2 M at near-neutral pH on illite saturated with Na+ ( mM), K+ (1 and 10 mM), NH4+ (10 mM) or Ca2+ (5 mM) revealed a Cited by: a deep geological disposal is an important issue for evaluating the long term release of fission products and actinides in the geosphere.

Among difficulties encountered when attempting such simulations is the fact that the glass and iron canister cannot, as opposed to the clay barriers or to the host rock, be considered.

The present paper describes the previous obtained results concerning purification of gases, water and sewages from toxic components such as mercury, radionuclides and petroleum substances. The tested materials constitute synthetic zeolites obtained in hydrothermal reaction, i.e., Na-X, Na-P1, and natural zeolite clinoptilolite.

The zeolites (Na-X, Na-P1 and clinoptilolite) needed Author: Magdalena Wdowin, Wojciech Franus. IMPACT FACTOR CiteScore SCImago Journal Rank (SJR) Source Normalized Impact per Paper (SNIP) An organism's genetic material is made up of polymers (chains) of four different nucleotides, like a recipe book written in a language of only four letters.

A mutation event is when the order of the nucleotides in DNA change, usually when the DNA is being copied. Ferrihydrite was exposed to U(VI)-containing cement leachate (pH ) and aged to induce crystallization of hematite.

A combination of chemical extractions, TEM, and XAS techniques provided the first evidence that adsorbed U(VI) (≈ ppm) was incorporated into hematite during ferrihydrite aggregation and the early stages of crystallization, with continued uptake Cited by: bonate or gluconate onto clay minerals Only a few detailed studies are available in the liter-ature dealing with the influence of carbonate as an omnipresent and strongly complexing groundwater ligand on actinide sorption onto clay minerals [4] and virtually no published data are available for higher ionic strength conditions, which is relevant.

Department of Earth Sciences / Institute of Geological Sciences / Geochemistry, Hydrogeology, Mineralogy Stability of clay minerals, natural and synthesized clay-organic associates under high alkaline conditions (). Conf. on Chemistry and Migration Be-haviour of Actinides and Fission Products in the Geosphere (Migration ' 2.

Transduction: Donor DNA is carried in a phage coat and is transferred into the recipient by the mechanism used for phage infection. Transformation: The direct uptake of donor DNA by the recipient cell may be natural or forced.

Relatively few. Tetrazole derivatives are a prime class of heterocycles, very important to medicinal chemistry and drug design due to not only their bioisosterism to carboxylic acid and amide moieties but also to their metabolic stability and other beneficial physicochemical properties.

Although more than 20 FDA-approved drugs contain 1H- or 2H-tetrazole substituents, their exact binding mode, Cited by:   Preview Biology for the IB Diploma (second edition), Brenda Walpole, Ashby Merson-Davies and Leighton Dann, Cambridge University Press.

Available March A process in which positively charged minerals are made available to a plant when hydrogen ions (secreted by a root hairs and cellular respiration) which then releases CO2 into the soil solution where it will react with H2O to form carbonic acid, and its dissociation adds H+ which displaces mineral ions from the clay particles.