Abstract
Analysis of wet and laboratory‐dried samples of wetland sediment showed that the concentrations of soluble and adsorbed selenium (Se) increased greatly if samples were dried. This effect was more pronounced at higher temperatures. The release of organic Se through rapid decomposition of sediment organic material and Se oxidation to selenate appear to be the major processes resulting in the increase of the concentrations of the soluble and adsorbed Se in dried sediment. This study shows that sediment drying, especially at higher temperatures, could affect the evaluation of Se speciation and availability in wetland sediment.
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