Combined U-Pb isotopic signatures of U mill tailings from France and Gabon: A new potential tracer to assess their fingerprint on the environment

An isotope dilution mass spectrometry overview: tips and applications for the measurement of radionuclides

“…A triple spike was used in U migration studies in marine sediments 143 and for environment pollution purposes. 103 The LODs of 230 Th for seawater samples are close to 0.15 fg kg −1 . 144 For analytical purposes, it is preferable in certain cases to measure the 230 Th/ 235 U ratio (as 230 Th is closer in terms of abundance to 235 U compared to 238 U), and subsequently calculate the 230 Th/ 238 U ratio by taking into account the natural 238 U/ 235 U ratio (137.818 ± 0.045).…”

“…U-series geochemistry provides a profound understanding of fundamental processes in widespread disciplines as diverse as geomorphology, 100 weathering and erosion of geological formations, 101 oceanography, 102 and environmental pollution science. 103,104 A wide range of U-series geochemistry applications to the Earth sciences was thoroughly summarized in "Uranium-series Disequilibrium, Applications to Earth, Marine and Environmental Sciences". 105 The uranium and thorium decay-series contain radioactive isotopes of many elements (in particular, 234,235,238 U, 230,232 Th, 231 Pa, 226 Ra and 227 Ac) with varied physicochemical properties leading to a fractionation (mainly elemental fractionation) within the chain in different geological environments during geochemical processes.…”

Source Apportionment and Health Risk Assessment of Heavy Metals in Endemic Tree Species in Southern China: A Case Study of Cinnamomum camphora (L.) Presl

“…The Pb isotope ratio analysis, as an efficient and accurate method for heavy metal tracer, has been applied to the fields of ecology and environmental science in recent years ( Beaumais et al, 2022 ; Dong et al, 2022 ). This study innovatively applied Pb isotopes to the source apportionment of HMs in the bark and leaves of the camphor tree and combined the source contribution with the human health risk assessment model to calculate the non-carcinogenic and carcinogenic risks of each pollution source to the camphor tree.…”