Marine colloids; Exopolymeric substances; Colloidal hydroxamate siderophoric moieties; Particle reactive radionuclides; Thorium; Protactinium; Lead; Polonium; Beryllium
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1. Introduction
Various studies have found that CEP-33779 colloidal organic carbon (COC) can play an important role in controlling the speciation, transport and bioavailability of natural trace elements in seawater and freshwater systems (Wilkinson and Lead, 2007 and references therein). However, the colloidal associations differ distinctly among the different radionuclides and areas of the world\'s oceans. Therefore, while vestigial structures is clear that the colloidal fraction of any given nuclide is not necessarily coupled tightly to the abundance of bulk colloidal carbon, less is known about the specific ligands or functional groups distributed within the colloidal organic matrix. Due to the complexities in the real environments, the straightforward correlations found for model compounds (e.g., Yang et al., 2013) cannot be applied directly to predict radionuclides flux or scavenging. Hence, it is very important to use field collected marine organic material to simulate the sorption systems in the natural environment.
prs.rt(\"abs_end\");
1. Introduction
Various studies have found that CEP-33779 colloidal organic carbon (COC) can play an important role in controlling the speciation, transport and bioavailability of natural trace elements in seawater and freshwater systems (Wilkinson and Lead, 2007 and references therein). However, the colloidal associations differ distinctly among the different radionuclides and areas of the world\'s oceans. Therefore, while vestigial structures is clear that the colloidal fraction of any given nuclide is not necessarily coupled tightly to the abundance of bulk colloidal carbon, less is known about the specific ligands or functional groups distributed within the colloidal organic matrix. Due to the complexities in the real environments, the straightforward correlations found for model compounds (e.g., Yang et al., 2013) cannot be applied directly to predict radionuclides flux or scavenging. Hence, it is very important to use field collected marine organic material to simulate the sorption systems in the natural environment.