Study of the Radiation Resistance of Endohedral Fullerenes of Rare-Earth Elements and Their Water-Soluble Derivatives

Using the hydrothermal method, we synthesized water soluble YVO4: Yb, Er nanoparticles with a size less than 10 nm. Nanoparticles exhibit intense luminescence in the green region due to Er3+ ions when excited by laser radiation at a wavelength of 980 nm as a result of the up-conversion process. Bright and stable luminescence also persists in an aqueous solution of nanoparticles. Based on experimental data, it can be argued that the objects obtained are promising in biological applications, as well as up-conversion phosphors.

Download Full-text

Adsorption experiment of water-soluble rare earth elements in atmospheric depositions and implications for source tracing in South China

Acta Geochimica ◽

10.1007/s11631-020-00440-4 ◽

2020 ◽

Author(s):

Xiaojian Mi ◽

Yuan Li ◽

Yuefeng Liu ◽

Yu Xie ◽

Hanjie Li ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

South China ◽

Water Soluble ◽

Adsorption Experiment ◽

Atmospheric Depositions ◽

Source Tracing

Download Full-text

Radiation resistance of GaAs–AlGaAs heterostructures doped with isovalent and rare-earth elements

Radiation Physics and Chemistry ◽

10.1016/s0969-806x(01)00330-9 ◽

2001 ◽

Vol 61 (3-6) ◽

pp. 553-555

Author(s):

I. Bolshakova ◽

S. Krukovskii ◽

D. Korbutiak ◽

M. Skulsky ◽

I. Zaverbnyi

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Radiation Resistance

Download Full-text

The Relative Radiation Resistance of Zirconolite, Pyrochlore, and Perovskite to 1.5 MeV Kr+ Ions

MRS Proceedings ◽

10.1557/proc-506-931 ◽

1997 ◽

Vol 506 ◽

Cited By ~ 3

Author(s):

Katherine L. Smith ◽

Nestor J. Zaluzec ◽

Gregory R. Lumpkin

Keyword(s):

Risk Assessment ◽

Rare Earth ◽

Radioactive Waste ◽

Rare Earth Elements ◽

Radiation Damage ◽

Radiation Resistance ◽

Predictive Modelling ◽

High Level Radioactive Waste ◽

High Level

ABSTRACTZirconolite (CaZrTi2O7), pyrochlore (vIIIA2VIB2IVx6y) and perovskite (CaTiO3) are candidate phases for the immobilisation of rare earth elements (REEs) and actinides (ACTs) in various high level radioactive waste (HLW) forms [1]. The effect of radiation damage on the structure and consequently on the durability of these phases is important to predictive modelling of their behaviour in the repository environment and risk assessment

Download Full-text

Water-soluble rare earth elements in atmospheric deposition at Shihua Cave, Beijing, north China

Applied Geochemistry ◽

10.1016/j.apgeochem.2019.04.007 ◽

2019 ◽

Vol 105 ◽

pp. 87-96 ◽

Cited By ~ 2

Author(s):

Xiaotao Peng ◽

Yuefeng Liu ◽

Shuhua Liu ◽

Ke Cheng ◽

Lijun Tian ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Atmospheric Deposition ◽

North China ◽

Water Soluble

Download Full-text

A Year-Round Measurement of Water-Soluble Trace and Rare Earth Elements in Arctic Aerosol: Possible Inorganic Tracers of Specific Events

Atmosphere ◽

10.3390/atmos12060694 ◽

2021 ◽

Vol 12 (6) ◽

pp. 694

Author(s):

Clara Turetta ◽

Matteo Feltracco ◽

Elena Barbaro ◽

Andrea Spolaor ◽

Carlo Barbante ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Methanesulfonic Acid ◽

Airborne Particulate Matter ◽

Water Soluble ◽

Anthropogenic Sources ◽

Aerosol Composition ◽

Svalbard Archipelago ◽

Back Trajectories ◽

Global Circulation

This study presents the year-round variability of the water-soluble fraction of trace elements (wsTE) and rare earth elements (wsREE) among size segregated airborne particulate matter samples collected at Ny-Ålesund in the Svalbard Archipelago from 26 February 2018 to 26 February 2019. Six different aerosol dimensional fractions were collected using a multi-stage Andersen impactor to better understand local and global circulation with the aim of disentangling the source of inorganic tracers from specific natural or anthropogenic sources. The wsTE and wsREE content, especially in the finest fractions in remote areas, is primarily related to long-range transport and it gives valuable information on (1) the global circulation, (2) the natural sources and (3) the contribution of human activities to aerosol composition. A Factor Analysis was applied to the dataset, including levoglucosan and methanesulfonic acid (MSA), to assess the possibility of using certain inorganic tracers as indicators of specific transport events or circulation regimes. We also investigate back-trajectories to determine potential source areas.

Download Full-text

REAP supplemental fertilizer improves greenhouse crop yield

10.1101/2020.08.27.266916 ◽

2020 ◽

Author(s):

Rachel Backer ◽

Damian Solomon

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

Crop Yield ◽

Water Soluble ◽

Growth And Yield ◽

Vegetable Crops ◽

Greenhouse Crops ◽

Significant Yield ◽

Soluble Fertilizer ◽

The Right

AbstractBackgroundMine tailings contain rare earth elements, including lanthanum and cerium, and plant micronutrients including iron. Previous studies have demonstrated that fertilizers containing rare earth elements and/or micronutrients can influence plant physiology, nutrient uptake and crop yield. However, applying the right dose of these fertilizers is critical since the concentration range associated with benefits is often narrow, and overapplication can lead to crop yield reductions. This study aimed to quantify the effects of a water-soluble fertilizer, REAP, on the yield of greenhouse crops.MethodsIn the first experiment, the effects of three concentrations of REAP (100, 250 or 500 ppm) were compared to a control (0 ppm REAP) on growth of lettuce, tomato and pepper growing in soilless media. In the second experiments, the effects of REAP applied at higher rates (500, 1000 and 2000 ppm) were compared to a control (0 ppm REAP) on the growth of lettuce, peppers, tomato and cantaloupe.ResultsIn the first experiment, there were no significant differences in yield between treatments, REAP appeared to promote root development. In the second experiment, there were significant yield increases for all crops treated with REAP. Gas exchange rates and nutrient concentration of tomato plants receiving REAP were not significantly different from the control. These results demonstrated that nutrient elements in REAP, including lanthanum, cerium, and micronutrients, improved the growth and yield of vegetable crops when applied at rates ranging from 500 to 2000 ppm.

Download Full-text

To the Issue of the Presence of the Occurrence of Rare Earth Elements in the Structure of Chromium Pyrope Garnet

The Bulletin of Irkutsk State University Series Earth Sciences ◽

10.26516/2073-3402.2021.38.71 ◽

2021 ◽

Vol 38 ◽

pp. 71-87

Author(s):

V. V. Lin ◽

◽

A. I. Turkin ◽

A. A. Chepurov ◽

◽

...

Keyword(s):

High Pressure ◽

Rare Earth ◽

Rare Earth Elements ◽

Total Content ◽

Kimberlite Pipe ◽

Distribution Coefficients ◽

Water Soluble ◽

Refractory Oxide ◽

Mineral Association ◽

Initial Charge

Rare earth elements (REE) in garnet are of interest in various fields of modern geology. The geochemistry of REEs in magmatic minerals is widely used in determining the distribution coefficients of crystal/melt and crystal/fluid, modeling the processes of melting and crystallization of magmatic rocks, studying deep mantle processes, age estimates and other issues of petrogenesis. The aim of the present work was a synthesis of a peridotite mineral association including the garnet containing REE at high pressure and high temperature. The initial sample consisted mainly of natural serpentine collected from ophiolites of the Eastern Sayan (Russia). As is known, the extreme stage of the regressive metamorphism of peridotites is serpentinization. It is depleted in calcium, but can recrystallize at high PT conditions into a harzburgite paragenesis, and at the initial stage of the experiment the chemical composition of the sample was a model harzburgite depleted in calcium and chromium, as well as a fluid of predominantly aqueous composition. As a source of chromium, chromite grains of 1–2 mm in size from peridotite xenoliths of the Udachnaya kimberlite pipe (Yakutia) were used. REE were added to the initial charge in the form of water-soluble salts. The experiment at a pressure of 5 GPa and temperature 1300 was performed on a multi-anvil high-pressure apparatus of the “split sphere” type (BARS) designed and developed at the V.S. Sobolev Institute of Geology and Mineralogy SB RAS. A container based on refractory oxide ZrO2 was used as a highpressure medium. The pressure in the cell before sample heating was estimated using the reference substances Bi and PbSe. The temperature was measured by a platinum-platinum-rhodium thermocouple PtRh30-PtRh6. The quenched was performed by switching off the voltage in the heater circuit. The experiment products contain an association of olivine + garnet + orthopyroxene + newly formed spinel. The predominant phase was olivine of a forsterite composition. A low-Fe orthopyroxene (1.49 – 1.68 wt% FeO) was found in elongated grains uniformly distributed throughout the sample. The newly formed spinel shows the faceted grains. The chromium content in the spinel significantly exceeds that of the initially added to the initial charge, 61.63 and 54.04 wt% Cr2O3, respectively. The garnet is characterized by a purple color, and was identified in the sample volume between olivine grains in the form of individual faceted crystals or their clusters. The largest garnets reached 0.5 mm in size. The synthesized garnet was determined as a high-Cr low-Ca pyrope variety. The contents of Cr2O3 and CaO are 10.15-11.21 and 0.06-0.11 wt%, respectively. The total content of REE in the garnet identified by the microprobe analysis is relatively high reaching 5-7 wt%. As a result of the work a mineral association corresponding to the peridotite paragenesis was obtained, including the subcalcic Crrich pyrope containing rare earth elements in significant amounts. It was estimated that their content in garnet mainly depends on the size of the ionic radius and, accordingly, on the atomic weight. This is consistent with the known facts about the preferable position of heavy REEs into the garnet structure compared to the light REEs.

Download Full-text