Welcome To Our Mining Equipment Production Base!
Strontium isotope geochemistry of soil and playa deposits ...

OSTI.GOV Conference: Strontium isotope geochemistry of soil and playa deposits near Yucca Mountain, Nevada

Read More
Strontium-90 - Wikipedia

Strontium-90 (90 Sr) is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.8 years. It undergoes β − decay into yttrium-90, with a decay energy of 0.546 MeV. Strontium-90 has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons and nuclear accidents.

Read More
"Uranium-Series and Strontium Isotope Ratios in Soils from ...

Uranium-series isotopes fractionate during chemical weathering and the activity ratios of (234U/238U), (230Th/238U), (238U/232Th) and (230Th/232Th) have great potential to constrain the rates and timescales of chemical weathering and soil formation in soil profiles. In addition, U-series techniques have been used in conjunction with strontium ...

Read More
Evaluation of strontium isotope tracers of produced water ...

Strontium isotope ratios (87Sr/86Sr) have been used as a sensitive tracer of sources of brine contamination in surface waters and shallow aquifers in areas where oil and gas production are limited to only a few reservoirs and produced water sources are well-defined. Recent expansion of conventional and unconventional oil and gas production to ...

Read More
Strontium and oxygen isotopes as indicators of Longobards ...

Strontium isotope ratios of human dental enamel and bone and associated fauna. The grey area corresponds to the local Sr range calculated as ± 2sd of the mean soil values 12.The dashed line ...

Read More
1st complete strontium isotope map of Israel tracks ...

Strontium isotopes, found in most soil, eventually make their way to human and animal bones and teeth, where they serve as a "fingerprint" of the locations in which they resided.

Read More
Strontium isotopic composition as tracer of weathering ...

Strontium isotopes (87 Sr/ 86 Sr) are routinely used to determine sources and mixing relationships in geochemical studies.They have proven to be useful in determining weathering processes and quantifying end-member mixing processes. A number of studies highlight that Sr isotopes represent a powerful tool helping to constrain weathering reactions, weathering …

Read More
Discussions - Copernicus.org

Strontium isotope ratios (87 Sr/ 86 Sr) of biogenic carbonates such as bones and teeth reflect the local sources of strontium ingested as food and drink during their formation . This has led to the use of strontium isotope ratios as a ... Soil and rock samples were collected throughout Israel in September and October 2008. Sample locations were ...

Read More
ESSD - Bioavailable soil and rock strontium isotope data ...

Strontium isotope ratios (87 Sr ∕ 86 Sr) of biogenic material such as bones and teeth reflect the local sources of strontium ingested as food and drink during their formation.This has led to the use of strontium isotope ratios as a geochemical tracer in a wide range of fields including archaeology, ecology, food studies and forensic sciences.

Read More
Uranium-Series and Strontium Isotope Ratios in Soils from ...

series techniques have been used in conjunction with strontium (Sr) isotopes to trace source materials in open systems, provided that the end-member reservoirs have distinct isotope signatures. By combining U-series and Sr isotope analysis in soil profiles, it …

Read More
Where did you grow up? How strontium in your teeth can ...

One of many new maps: Cape York strontium isotope results can be used to match human values to environmental signals in soil, plants and water. Shaun Adams et al. 2019, Author provided

Read More
Strontium-90 activity concentration in soil samples from ...

Radioactive strontium isotopes in the atomic mass number range of 89 to 92 are generated with high cumulative fission yield (5–6%) during thermal neutron fission in a nuclear reactor 1,2.Nuclear ...

Read More
Strontium in the environment: Review about reactions of ...

Isotopes of stable strontium occur naturally in the soil and are useful nutrient tracers in vegetation (Blum et al., 2000; Dasch et al., 2006); they are used for instance to investigate transport of nutrients (calcium) to Pinus edulis (Coble et al., 2015) and to Zea mays (McGonigle and Grant, 2015).

Read More
Plant Sr Isotope Ratios As Affected by the Sr Isotope ...

The transfer, from soil to Chinese cabbage and spinach, of radioactive strontium-90 released as a result of accidents in nuclear power stations was studied using a stable isotope of strontium ...

Read More
Isotopes of strontium - Wikipedia

The alkaline earth metal strontium (38 Sr) has four stable, naturally occurring isotopes: 84 Sr (0.56%), 86 Sr (9.86%), 87 Sr (7.0%) and 88 Sr (82.58%). Its standard atomic weight is 87.62(1).. Only 87 Sr is radiogenic; it is produced by decay from the radioactive alkali metal 87 Rb, which has a half-life of 4.88 × 10 10 years (i.e. more than three times longer than the current age of …

Read More
A preliminary bioavailable strontium isotope soil map of ...

The GEMAS project collected samples from grazing land (n=2118, 0-20cm depth) and agricultural soil (n=2211, 0-10cm depth) at a scale of 1 site/2500km2 in most of Europe1. Elemental analysis using different extractions (Aqua Regia and MMI), whole soil XRF data and Q-ICPMS lead isotope data have been published1. Here we report high-precision 87Sr/86Sr results for the …

Read More
Strontium Contamination in the Environment | SpringerLink

10%Written by expert contributors, it addresses occurrence, detection and extraction of strontium, the chemical and nuclear properties of strontium isotopes, the fate and migration of strontium in soil, its bioaccumulation, and its associated health impact, mechanistic toxicity response as well as related regulation and remediation.

Read More
Agricultural lime disturbs natural strontium isotope ...

In recent years, variations in strontium 87 Sr/ 86 Sr ratios have been applied to uncover migration patterns of prehistoric humans and animals with considerable success (1–6).The method is based on the observation that the 87 Sr/ 86 Sr ratios in soil substrates vary geographically, reflecting the lithology of the soil. Strontium is released from the substrate to …

Read More
USGS -- Isotope Tracers -- Resources

Periodic Table--Strontium. The alkali earth metal strontium has four stable, naturally occurring isotopes: 84 Sr (0.56%), 86 Sr (9.86%), 81 Sr (7.0%) and 88 Sr (82.58%). Only 87 Sr is radiogenic; it is produced by decay from the radioactive alkali metal 87 Rb, which has a half-life of 48,800,000 years. Thus, there are two sources of 87 Sr in any material: that formed during …

Read More
Strontium | Toxic Substances | Toxic Substance Portal | ATSDR

Strontium is a naturally occurring element found in rocks, soil, dust, coal, and oil. Naturally occurring strontium is not radioactive and is either referred to as stable strontium or strontium. Strontium in the environment exists in four stable isotopes, 84 Sr (read as strontium eighty-four), 86 Sr, 87 Sr, 88Sr.

Read More
DETERMINATION OF HEAVY METALS AND LEAD- …

DETERMINATION OF HEAVY METALS AND LEAD-STRONTIUM ISOTOPE CHARACTERIZATION … 319 soil of arid and semiarid regions, its amounts are higher [14]. The total content of Ni showed significant positive correlation with the organic matter from soil surface (0-20 cm depth) which indicate that the organic matter on the first layer of the cultivated ...

Read More
HIGHLIGHTS: Exposure to stable or radioactive strontium ...

Strontium is a naturally occurring element found in rocks, soil, dust, coal, and oil. Naturally occurring strontium is not radioactive and is either referred to as stable strontium or strontium. Strontium in the environment exists in four stable isotopes, 84. Sr (read as strontium eighty-four), 86. Sr, 87. Sr, 88. Sr.

Read More
EPA FACTS ABOUT STRONTIUM-90

The isotopes of strontium and yttrium emit beta particles as they decay. The release of radiation during this decay process causes concern about the safety of strontium and all other radioactive substances. Beta particles can pass through skin, but they cannot pass through the entire body. The most common isotope of strontium is strontium-90.

Read More
(PDF) Distribution of Strontium in Soil: Interception ...

The migration rate of strontium in the soil profile depends on the physicochemical and mineralogical characteristics of the soil. ... (tritium, potassium …

Read More
Introduction to Sr Isotope Geochemistry | Isobar Science

Strontium is a ubiquitous trace element present in rocks, soil, waters, plants, and animals. The 87 Sr/ 86 Sr ratio is a function of the geochemical origin, Rb concentration, and age of the source rock. Because of the high mass of Sr, the ratio is essentially unchanged as the rock weathers and moves through the water cycle and food chain.

Read More
A preliminary bioavailable strontium isotope soil map of ...

The GEMAS project collected samples from grazing land (n=2118, 0-20cm depth) and agricultural soil (n=2211, 0-10cm depth) at a scale of 1 site/2500km2 in most of Europe1. Elemental analysis using different extractions (Aqua Regia and MMI), whole soil XRF data and Q-ICPMS lead isotope data have been published1. Here we report high-precision 87Sr/86Sr …

Read More
The role of vegetation in setting strontium stable isotope ...

Abstract. At Earth's surface the stable isotope ratio of strontium (88 Sr/ 86 Sr) is predominantly set by biological uptake of Sr and its storage in plant litter.This conclusion was reached from a stable isotope mass balance that was independently validated by direct determination of elemental fluxes between the Critical Zone compartments (rock, soil, …

Read More
Strontium Isotopes | SpringerLink

While classified geochemically as a trace element, Sr is found in easily measurable quantities in a wide variety of rocks. It is soluble in aqueous solution as the +2 ion and is geochemically very similar to Ca, the latter a major alkaline-earth constituent of rocks. The half-life of 87 Rb, which decays to 87 Sr, is such that considerable ...

Read More
Soil data reveals secrets in ancient Israel - Phys.org

Strontium is an element found in a range of natural materials in a variety of forms, known as isotopes. It's incorporated into soils and water as …

Read More
(PDF) Strontium Isotope Fractionation in Soils and ...

Available online at Procedia Earth and Planetary Science 7 (2013) 790 – 793 Water Rock Interaction [WRI 14] Strontium isotope fractionation in soils and pedogenic processes Netta Shaleva,b*, Boaz Lazara, Ludwik Haliczb, Mordechai Steinb, Ittai Gavrielib, Amir Sandlerb, Irena Segalb a Institute of Earth Sciences, The Hebrew University of Jerusalem, …

Read More
Radionuclide Basics: Strontium-90 | US EPA

T.D. Bullen, in Treatise on Geochemistry (Second Edition), 2014 7.10.4.1 Strontium. Strontium (Sr) is a trace element in most geological and biological systems and does not serve any important nutritional function in plants, yet strontium isotopes have arguably provided more information on weathering and hydrological processes than any other metal isotope system.

Read More