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Updated: Jan 20, 2026
09:41
Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
Published on: May 29, 2018
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BULK CHEMISTRY OF KARST SEDIMENT DEPOSITS
Mohammad Shokri1, Dorothy J Vesper2, Ellen K Herman3
1West Virginia University, Dept. of Geology and Geography, 98 Beechurst Ave., Morgantown, WV 26506, USA, moshokri@mix.wvu.edu.
Sinkholes and the Engineering and Environmental Impacts of Karst : Proceedings of the ... Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst. Multidisciplinary Conference on Sinkholes and Th
|August 23, 2019
Summary
Karst sediment characterization reveals crucial data for contaminant transport and remediation strategies. Understanding sediment properties like particle size and elemental composition is key for predicting environmental behavior and planning effective cleanup.
Area of Science:
- Environmental Science
- Geochemistry
- Hydrogeology
Background:
- Sediments in karst systems significantly impact contaminant fate, transport, and remediation effectiveness.
- Understanding sediment physical and chemical properties is vital for predicting contaminant behavior and designing remediation strategies.
Purpose of the Study:
- To conduct physical and chemical characterizations of karst sediments from cave and spring deposits.
- To provide data essential for predicting contaminant fate and transport and for planning remediation projects.
Main Methods:
- Analyzed 11 sediment samples from karst regions for particle-size distribution (sieving, laser diffraction).
- Determined slurry pH, specific conductivity (SC), and elemental composition (C, N, S, Al, Ca, Fe, Mg, Mn) using CNS analysis and ICP-OES after aqua regia extraction.
Main Results:
- Most samples were dominated by the <2 mm fraction with pH ranging from 6.8 to 8.4 and SC from 45 to 206 μS/cm.
- Organic carbon fraction (Foc) ranged from <0.1% to 2%; a saltpeter cave sample showed high N and S concentrations.
- Magnesium (Mg) concentrations were consistent (2.0-6.1 g/kg), while Calcium (Ca) varied widely (1.4-52 g/kg).
Conclusions:
- Sediment particle size and elemental makeup are critical factors influencing chemical reactions and remediation success in karst environments.
- Comprehensive data on karst sediment properties are necessary for accurate contaminant fate and transport modeling and effective remediation planning.
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