The strontium isotope fingerprint of phosphate rocks mining

Vengosh, Avner; Wang, Zhen; Williams, GA; Hill, Robert M.; Coyte, Rachel M.; Dwyer, Gary S.

doi:10.1016/j.scitotenv.2022.157971

Cited by 7 publications

(2 citation statements)

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“…Consequently, P-fertilizers originating from PRs in China and India typically have much higher 87 Sr/ 86 Sr ratio than P-fertilizers generated in the Middle East, North Africa, and eastern and western U.S. (Figure ). Data of the 87 Sr/ 86 Sr ratio in PRs and P-fertilizers from the Middle East are consistent with almost identical 87 Sr/ 86 Sr ratios reported for wastewater and PRs from a P-fertilizer facility in Israel . The consistency of the Sr isotope ratios in P-fertilizers with the isotope ratios of PRs from the same country provides a novel tool for the identification of the source of P-fertilizers, despite the differences in P-fertilizer manufacturing processes.…”

Section: Resultssupporting

confidence: 73%

“…Data of the 87 Sr/ 86 Sr ratio in PRs and P-fertilizers from the Middle East are consistent with almost identical 87 Sr/ 86 Sr ratios reported for wastewater and PRs from a P-fertilizer facility in Israel. 70 The consistency of the Sr isotope ratios in P-fertilizers with the isotope ratios of PRs from the same country provides a novel tool for the identification of the source of P-fertilizers, despite the differences in P-fertilizer manufacturing processes. This can distinguish those from China that are characterized by relatively low TE contents and high 87 Sr/ 86 Sr from P-fertilizers originated from younger PRs from the U.S., North Africa, and Middle East with distinctively higher TE content and lower 87 Sr/ 86 Sr ratios.…”

Section: Sr Isotopes In P-fertilizers and Phosphatementioning

confidence: 99%

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Tracing the Environmental Effects of Mineral Fertilizer Application with Trace Elements and Strontium Isotope Variations

Hill,

Williams,

Wang

et al. 2024

Environ. Sci. Technol. Lett.

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Fertilizer utilization is critical for food security. This study examines the occurrence of trace elements (TEs) and Sr isotope (87Sr/86Sr) variations in phosphate rocks and mineral fertilizers from a sample collection representative of major phosphate producing countries. We show high concentrations of several TEs in phosphate rocks (n = 76) and their selective enrichment in phosphate fertilizers (n = 40) of specific origin. Consistent with the concentrations in parent phosphate rocks, phosphate fertilizers from the U.S. and Middle East have substantially higher concentrations of U, Cd, Cr, V, and Mo than those in fertilizers from China and India. Yet, fertilizers from China and India generally have higher concentrations of As. The 87Sr/86Sr in phosphate fertilizers directly mimic the composition of their source phosphate rocks, with distinctive higher ratios in fertilizers from China and India (0.70955–0.71939) relative to phosphate fertilizers from U.S. and Middle East (0.70748–0.70888). Potash fertilizers have less Sr and TEs and higher 87Sr/86Sr (0.72017–0.79016), causing higher 87Sr/86Sr in mixed NPK-fertilizers. Selective extraction (Mehlich III) of soils from an experimental agricultural site shows relative enrichment of potentially plant-available P, Sr, and TEs in topsoil, which is associated with Sr isotope variation toward the 87Sr/86Sr of the local utilized phosphate fertilizer.

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Section: Resultssupporting

confidence: 73%

Section: Sr Isotopes In P-fertilizers and Phosphatementioning

confidence: 99%