The short-lived radionuclide Th is widely used to study particle scavenging and transport from the upper ocean to deeper waters. This manuscript optimizes, reviews and validates the collection, processing and analyses of total Th in seawater and suggests areas of further improvements. The standard Th protocol method consists of scavenging Th from seawater via a MnO precipitate, beta counting, and using chemical recoveries determined by adding Th.
View Article and Find Full Text PDFThe Fukushima Dai-ichi Nuclear Power Plants (FDNPPs) accident in 2011 led to an unprecedented release of radionuclides into the environment. Particularly important are Sr and Cs due to their known health detriments and long half-lives ( ≈ 30 y) relative to ecological systems. These radionuclides can be combined with the longer-lived I ( = 15.
View Article and Find Full Text PDFEnviron Sci Technol
February 2019
Amidoxime-based adsorbents have become highly promising for seawater uranium extraction. However, current deployment schemes are stand-alone, intermittent operation systems that have significant practical and economic challenges. This paper presents two 1:10 scale prototypes of a Symbiotic Machine for Ocean uRanium Extraction (SMORE) which pairs with an existing offshore structure.
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