Adsorption Processes in Soils and Sediments

A special issue of Soil Systems (ISSN 2571-8789).

Deadline for manuscript submissions: 30 June 2025 | Viewed by 975

Special Issue Editor


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Guest Editor
Department of Agricultural and Environmental Sciences, Tennessee State University, Nashville, TN 37209, USA
Interests: fate of emerging contaminants: pharmaceuticals and metalloids (antimony); nutrient cycling (nitrogen and phosphorus); redox biogeochemistry of humic substances; environmental remediation

Special Issue Information

Dear Colleagues,

Adsorption processes in soil and sediments influence the partitioning of nutrient oxyanions, cations, and pollutant ions between solid (soil) and liquid (water) phases and thus change their mobility in the ecosystem. Understanding the adsorption mechanisms of nutrient and pollutant ions is a key to predicting their fate in the environment. Various other factors and processes can also affect the partitioning mechanisms. For example, oxidation/reduction processes, the presence of co-adsorbing or competing ions, microbial activity, temperature fluctuations, etc.

Authors are invited to submit their manuscripts on the adsorption mechanisms of nutrient or pollutant ions on soils, sediments, or environmentally relevant synthetic soil minerals. The research can be focused on only macroscopic adsorption study or with the detailed spectroscopic characterizations of the mechanisms or a combination of both.

Dr. Sudipta Rakshit
Guest Editor

Manuscript Submission Information

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Keywords

  • adsorption processes
  • soils
  • sediments

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Published Papers (1 paper)

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Research

17 pages, 4336 KiB  
Article
Sorption and Phase Associations of Chromate and Vanadate with Two Contrasting North Carolina Saprolites
by Fatai O. Balogun, Hannah R. Peel, Robert E. Austin, Ibrahim G. Okunlola, David S. Vinson, Owen W. Duckworth and Matthew L. Polizzotto
Soil Syst. 2024, 8(4), 127; https://doi.org/10.3390/soilsystems8040127 - 3 Dec 2024
Viewed by 511
Abstract
Geogenic chromium (Cr) and vanadium (V) contamination of groundwater in the Piedmont region of North Carolina poses threats to public health. These contaminants are naturally derived from saprolite and aquifer materials, but geochemical variability in these materials makes it difficult to predict specific [...] Read more.
Geogenic chromium (Cr) and vanadium (V) contamination of groundwater in the Piedmont region of North Carolina poses threats to public health. These contaminants are naturally derived from saprolite and aquifer materials, but geochemical variability in these materials makes it difficult to predict specific risks of Cr and V in well water. The objectives of this study were to (1) determine host phases of Cr and V in representative subsurface materials; (2) characterize contaminant binding parameters of chemically variable saprolites; and (3) examine the influence of saprolite chemistry on contaminant sorption, speciation, and phase associations. Isotherm experiments revealed that saprolite samples sorbed roughly an order of magnitude more V than Cr. Chemical extractions and synchrotron-based X-ray fluorescence showed that substantial Cr and V were bound with metal oxide/oxyhydroxides in native and Cr-and V-sorbed saprolites; however, electrostatically bound fractions were also present, representing potentially important sources of groundwater contamination. X-ray absorption-near-edge-structure spectroscopy indicated that sorbed Cr was found as reduced Cr(III), whereas sorbed V was dominated by the oxidized V(V) and intermediate V(IV) species. Results from this study could be used to help parameterize mechanistic models and improve prediction of the Cr and V contamination potential of shallow aquifers. Full article
(This article belongs to the Special Issue Adsorption Processes in Soils and Sediments)
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