Soft tissue measurement of arsenic and selenium in an animal model using portable X-ray fluorescence

Fleming, David E.B.; Groves, John W.; Gherase, Mihai R.; George, Graham N.; Pickering, Ingrid J.; Ponomarenko, Olena; Langan, George; Spallholz, Julian E.; Alauddin, Mohammad; Ahsan, Habibul; Ahmed, Selim; Porte, Paul F. La

doi:10.1016/j.radphyschem.2015.06.007

Cited by 11 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These considerations do require measurements of the oxidation state of the Se species and demonstrate the need for continued development of advanced methods for detection and measurements of components in complex matrices. We illustrate in this manuscript that the use of speciation analysis significantly enhances the understanding of previously reported results for other systems [ 25 , 52 , 53 , 54 , 55 , 56 , 57 ].…”

Section: Discussionmentioning

confidence: 61%

“…The subject of other cations will be considered particularly when the processing of the Se due to uptake by the plants in the creek bed is examined. Thus, speciation of iron and other metal ions become important [ 25 , 52 , 53 , 54 , 55 , 56 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

“…These findings are important because several of these sites are found to have high levels of Se. However, previously it was demonstrated that there are no apparent toxicity effects associated with the fish population and these high Se levels [ 19 , 25 , 52 , 53 , 54 , 55 , 56 , 57 ]. The data presented here thus further characterize the Se-rich waters in which most of the Se is in the Se(VI) oxidation state.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Selenium Speciation in the Fountain Creek Watershed (Colorado, USA) Correlates with Water Hardness, Ca and Mg Levels

et al. 2017

View full text Add to dashboard Cite

The environmental levels of selenium (Se) are regulated and strictly enforced by the Environmental Protection Agency (EPA) because of the toxicity that Se can exert at high levels. However, speciation plays an important role in the overall toxicity of Se, and only when speciation analysis has been conducted will a detailed understanding of the system be possible. In the following, we carried out the speciation analysis of the creek waters in three of the main tributaries—Upper Fountain Creek, Monument Creek and Lower Fountain Creek—located in the Fountain Creek Watershed (Colorado, USA). There are statistically significant differences between the Se, Ca and Mg, levels in each of the tributaries and seasonal swings in Se, Ca and Mg levels have been observed. There are also statistically significant differences between the Se levels when grouped by Pierre Shale type. These factors are considered when determining the forms of Se present and analyzing their chemistry using the reported thermodynamic relationships considering Ca2+, Mg2+, SeO42−, SeO32− and carbonates. This analysis demonstrated that the correlation between Se and water hardness can be explained in terms of formation of soluble CaSeO4. The speciation analysis demonstrated that for the Fountain Creek waters, the Ca2+ ion may be mainly responsible for the observed correlation with the Se level. Considering that the Mg2+ level is also correlating linearly with the Se levels it is important to recognize that without Mg2+ the Ca2+ would be significantly reduced. The major role of Mg2+ is thus to raise the Ca2+ levels despite the equilibria with carbonate and other anions that would otherwise decrease Ca2+ levels.

show abstract

Section: Discussionmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Selenium Speciation in the Fountain Creek Watershed (Colorado, USA) Correlates with Water Hardness, Ca and Mg Levels

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Other examples include electrochemical probes using gold nanoparticles showing DL of 0.12-0.27 μg L −1 for potential applications in seawater and agricultural food but no proven use in environmental monitoring (Segura et al, 2015;. The use of portable XRF (X-ray fluorescence) analysis for on-site screening of Se in solid samples has been reported for nail clippings, soils, soil suspensions and animal tissues, showing DL of 0.83-1.00 mg kg −1 for direct analyses (Beaudette et al, 2009;Fleming et al, 2015). However, as the sample-instrument geometry and sample matrix strongly influence the XRF measurements, accuracy and precision, the DL can strongly vary when using portable XRF instruments.…”

Section: )mentioning

confidence: 99%

Radioactive selenium: origin and environmental dispersion scenarios

Gil-Díaz¹,

Heberling²,

Eiche³

2021

Environmental Technologies to Treat Selenium Pollution

View full text Add to dashboard Cite

Radionuclides can be present in the environment from both natural and anthropogenic origins, showing characteristic biogeochemical behaviours according to the specific properties of the element. The environmental mobility and bioavailability of selenium (Se) strongly depends on the chemical species which, in turn, depends on aspects like redox state and microbiology. Among the most common oxidation states, species of Se(IV) and Se(VI) are considered relatively mobile and bioavailable. Once incorporated within an organism, Se shows a narrow band between dietary deficiency (e.g., used as a co-factor in functional proteins and RNA) and toxicity (e.g., selenosis, dependent on the concentrations and the chemical species involved; Jeffery et al., 2002). The recommended daily intake for adult humans is limited to 1 μg kg −1 of body weight, with a maximum allowable concentration in drinking water of 10 μg L −1 (WHO [World Health Organization], 2011). In addition, Se has no essential metabolism in plants but it is still readily taken up and accumulated due to its structural similarity with other oxyanion forms of bio-essential elements like sulfate and phosphate (Pilon-Smits et al., 2017).

show abstract

Lead content in soil, plants, rodents, and amphibians in the vicinity of a heating plant’s ash waste

Poganyová

Haas

Solár

2021

Environ Monit Assess

View full text Add to dashboard Cite

Soft tissue measurement of arsenic and selenium in an animal model using portable X-ray fluorescence

Cited by 11 publications

References 29 publications

Selenium Speciation in the Fountain Creek Watershed (Colorado, USA) Correlates with Water Hardness, Ca and Mg Levels

Selenium Speciation in the Fountain Creek Watershed (Colorado, USA) Correlates with Water Hardness, Ca and Mg Levels

Radioactive selenium: origin and environmental dispersion scenarios

Lead content in soil, plants, rodents, and amphibians in the vicinity of a heating plant’s ash waste

Contact Info

Product

Resources

About