永久冻土
铀
遗传算法
动员
环境科学
环境化学
地质学
地球科学
化学
生态学
海洋学
地理
生物
考古
材料科学
冶金
作者
Elliott K. Skierszkan,Valerie A. Schoepfer,Matthew Fellwock,Matthew B.J. Lindsay
标识
DOI:10.1021/acs.est.4c05594
摘要
Uranium is a toxic and pervasive geogenic contaminant often associated with organic matter. Its abundance and speciation in organic-rich permafrost soils are unknown, thereby limiting our ability to assess risks associated with uranium mobilization during permafrost thaw. In this study, we assessed uranium speciation in permafrost soil and porewater liberated during thaw using active-layer and permafrost samples from a study area in Yukon, Canada where elevated uranium concentrations occur in bedrock and groundwater. Permafrost contained 1.1-28 wt % organic carbon and elevated uranium (range 7.6-1040 μg g
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