Modeling hydrologic controls on sulfur processes in sulfate‐impacted wetland and stream sediments
نویسندگان
چکیده
منابع مشابه
Controls on Arsenic Mobility in Contaminated Wetland and Riverbed Sediments
Arsenic mobility and transport in the environment are strongly influenced by associations with solid phases. This dissertation investigates the mechanisms affecting arsenic retention in contaminated wetland and riverbed sediments. A sequential extraction procedure was designed and tested to differentiate solid phase arsenic speciation, including adsorbed As and As coprecipitated with amorphous ...
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Bacterial reduction of a hematite-rich natural coastal sand was studied in flow-through column reactors at flow rates which varied from 0.62 to 11 pore volumes d(-1). Sand columns were wet-packed with the dissimilatory metal-reducing bacterium (DMRB) Shewanella putrefaciens CN32, and a PIPES-buffered, lactate-containing growth medium was pumped through the columns for over 20 days. Soluble Fe(I...
متن کاملEnvironmental Controls on Nitrogen and Sulfur Cycles in Surficial Aquatic Sediments
Enhanced anthropogenic inputs of nitrogen (N) and sulfur (S) have disturbed their biogeochemical cycling in aquatic and terrestrial ecosystems. The N and S cycles interact with one another through competition for labile forms of organic carbon between nitrate-reducing and sulfate-reducing bacteria. Furthermore, the N and S cycles could interact through nitrate [Formula: see text] reduction coup...
متن کاملPhosphorus sorption by sediments in a southeastern coastal plain in-stream wetland.
A close relationship has been reported between sediment organic C (SedOC) content and its P sorption capacity (P(max)) and total P (TP) concentration. Phosphorus sorbed to organically complexed cations is a proposed explanation for this relationship. The objectives of this study were (i) to determine relationships between in-stream wetland SedOC content and both the sediment's P(max) and TP con...
متن کاملApplication of Multiscale Modeling for Characterizing Variability in Hydrologic Processes
{We describe a multiscale modeling framework applicable for a wide range of hydrologic processes. The foundation for this work has been laid by Basseville et al. 1992] and Chou et al. 1994]. Their development is based on treating the scale parameter akin to time, such that description at a particular scale captures the features of the process up to that scale that are relevant for the predictio...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Biogeosciences
سال: 2017
ISSN: 2169-8953,2169-8961
DOI: 10.1002/2017jg003822