Two-step extraction method for lead isotope fractionation to reveal anthropogenic lead pollution.

Author(s) Katahira, K.; Moriwaki, H.; Kamura, K.; Yamazaki, H.
Journal Environ Technol
Date Published 2019 Nov
Abstract

This study developed the 2-step extraction method which eluted the Pb adsorbing on the surface of sediments in the first solution by aqua regia and extracted the Pb absorbed inside particles into the second solution by mixed acid of nitric acid, hydrofluoric acid and hydrogen peroxide solution. We applied the method to sediments in the enclosed water area and found out that the isotope ratios of Pb in the second solution represented those of natural origin. This advantage of the method makes it possible to distinguish the Pb between natural origin and anthropogenic source on the basis of the isotope ratios. The results showed that the method was useful to discuss the Pb sources and that anthropogenic Pb in the sediment samples analysed was mainly derived from China because of transboundary air pollution.

DOI 10.1080/09593330.2018.1478885
Keywords China; Environmental Monitoring; Geologic Sediments; Isotopes; Lead
ISSN 1479-487X
Citation Katahira K, Moriwaki H, Kamura K, Yamazaki H. Two-step extraction method for lead isotope fractionation to reveal anthropogenic lead pollution. Environ Technol. 2019;40(26):3473-3478.

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