Lead in Egyptian soils: Origin, reactivity and bioavailability measured by stable isotope dilution

Shetaya, Waleed H.; Marzouk, Ezzat R.; Mohamed, Elham F.; El-Kassas, Mohamed S.; Bailey, Elizabeth H.; Young, Scott D.

doi:10.1016/j.scitotenv.2017.11.040

Cited by 18 publications

(13 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is clear that although a straight line through the data would indicate 2 dominant sources, the substantial scatter around the mixing line could be erroneously interpreted as indicating multiple (> 2) sources of Pb in the current dataset. This highlights the necessity for longer total acquisition time than previously reported(33,35) and a fuller understanding of causes of error in determination of Pb isotope ratios. Figure6.…”

mentioning

confidence: 72%

Optimisation of a current generation ICP-QMS and benchmarking against MC-ICP-MS spectrometry for the determination of lead isotope ratios in environmental samples

Usman

Ander

Bailey

et al. 2018

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 72%

Optimisation of a current generation ICP-QMS and benchmarking against MC-ICP-MS spectrometry for the determination of lead isotope ratios in environmental samples

Usman

Ander

Bailey

et al. 2018

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

“…Concentrations of Pb, P, Fe, Al and Mn in soil digestates and extracts were determined using ICP-MS (Model iCAPQ; Thermo Fisher Scientific GmbH, Bremen, Germany) as described in Shetaya et al (2018). Briefly, samples and multi-element calibration standards (Certiprep/Fisher, UK) were diluted in 2% Primar Plus™ grade HNO3 and measured in triplicate.…”

Section: Elemental and Isotopic Analyses By Icp-msmentioning

confidence: 99%

“…Key soil parameters are shown in Table 2. Total soil Pb concentrations (TPb) in the studied locations are discussed in detail by Shetaya et al (2018). Briefly, TPb was greatest at the lead smelter site (SH-I), peaking at ~ 31,000 mg kg -1 with an average of ~ 16,200 mg kg -1 .…”

Section: Soil Propertiesmentioning

confidence: 99%

“…1 where F5 was a minor constituent of TPb. Shetaya et al (2018) 'geogenic'). This suggests that these are the two major contributors to both non-residual and residual Pb fractions in the studied soils with only minor contributions from other potential sources contributing to scattering of the data around the binary line.…”

Section: Isotopic Fractionation Of Pb In Soil Phasesmentioning

confidence: 99%

“…The isotopic abundances of the four stable Pb isotopes were also measured in the SEP extracts by inductively coupled plasma mass spectrometry (ICP-MS). The objective was to assess the degree of assimilation of anthropogenic-Pb (mainly petrol-Pb) and geogenic Pb, into each soil Pb fraction (Shetaya et al, 2018). Moreover, multiple-sources models were used to try to identify the relative contribution of petrol, geogenic and industrial Pb sources, to different soil phases, based on their Pb isotopic signatures.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chemical and isotopic fractionation of lead in the surface soils of Egypt

Shetaya

Marzouk

Mohamed

et al. 2019

Applied Geochemistry

Self Cite

View full text Add to dashboard Cite

Chemical fractionation via sequential extraction (SEP) combined with isotopic analysis of Pb was used to investigate the origins and reactivity of Pb in topsoil samples collected from 12 different locations in Egypt. The total soil Pb concentrations (TPb) covered a wide range (~ 80 -16,000 mg kg -1 ), but were only elevated in four industrial and urban locations within Cairo and Alexandria. In all the other locations values of TPb were generally low and were close to the average crustal Pb concentration of 14 mg kg -1 . The largest Pb fraction in all soils, with the exception of two industrial locations, was the 'residual' fraction (38 -63% of TPb) followed by Pb bound to 'organic' and 'metal oxide' phases. The Pb isotopic signatures ( 206 Pb/ 207 Pb vs 208 Pb/ 207 Pb) of all samples in all SEP fractions were highly variable, suggesting a heterogeneous mix of Pb contamination sources; however, they aligned closely to a binary mixing line between geogenic and petrol Pb sources. There were similar patterns across all of the non-residual fractions with measureable data (F2 -F4) suggesting that the non-residual anthropogenic-Pb and geogenic-Pb have been assimilated into common pools within the soil. Binary and ternary source-apportionment models based on Pb isotopic ratios and abundances showed that the relative contribution of petrol-Pb and geogenic-Pb can be ascribed with reasonable certainty.However, the contribution of further sources can only be accounted for if the isotopic abundance of all end-members are known and are at the periphery of the soils dataset.

show abstract