Accelerated aqueous leaching of selenium and arsenic from coal associated rock samples with selenium speciation using ultrasound extraction

Pumure, Innocent; Renton, John J.; Smart, Ronald B.

doi:10.1007/s00254-008-1200-9

Cited by 15 publications

(4 citation statements)

References 30 publications

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“…Due to the lengthy process associated with natural rock dissolution (Sparks, 1989), Roy (2005) and Pumure et al (2009) Se extracted from each sample (sandstone, claystone 1, claystone 2) ranged from 75-99%, 14-35%, and 9.0-14%, respectively. An additional study by Pumure et al (2010) found that 35% and 38% of total Se in shale samples from a southern WV surface mine were extractable by similar ultransonic methods.…”

Section: Desorption Of Seleniummentioning

confidence: 99%

“…Limited studies have investigated the leaching of Se specifically from materials associated with coal mining (e.g. Sharmasarkar and Vance, 2002;Roy, 2005;Wang et al, 2007;Pumure et al, 2009;Pumure et al, 2010;Ziemkiewicz et al, 2011). The relationship between Se and groundwater movement in reclaimed landforms, particularly how selenium partitions between liquid and solid phases in response to groundwater seepage, has not been quantified with modeling studies.…”

Section: Introductionmentioning

confidence: 99%

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Geomorphic Landform Design as an Alternative for Conventional Valley Fill Surface Mine Reclamation: Assessing Conceptual Design, Groundwater Modeling, and Contaminant Desorption

DePriest¹

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This research aimed to evaluate the potential of applying geomorphic landform design (GLD) principles to valley fill reclamation, specifically in southern West Virginia, central Appalachia, USA. When constructing reclaimed landforms, GLD aims to mimic the geomorphology of reference landforms that are stable and in erosive and hydrologic equilibrium. Challenges with the technique have been identified related to use in central Appalachia. Reference landform design values vary by location and need to be quantified at a local scale for site-specific design. Due to the steep slopes of existing valleys, constructing engineered landforms that naturally blend in with the surrounding environment may not ensure stability. Less steep, more stable slopes of geomorphic landforms could create greater stream disturbance to maintain fill volumes. Potential benefits of GLD with respect to groundwater movement and contaminant desorption have also not been quantified. This research presents three major objectives to assess geomorphic landform design in central Appalachia: 1) define the geomorphic characteristics of mature landform reference sites in southern West Virginia; 2) quantify the issues associated with implementing geomorphic reclamation on a field scale at an existing valley fill; and, 3) compare models of groundwater movement and desorption of selenium in reclamation alternatives for a southern WV surface mine. Geomorphic properties of drainage length and drainage density for mature landforms in central Appalachia were 408 ft and 62 ft/ac, respectively. Slopes were steep (>20%), aspects were well distributed in all directions, vegetation was predominately dense core forest, and ephemeral channel heads developed where erosive surface processes created concentrated flow and sediment transport. Potential issues associated with implementing GLD in central Appalachia with respect to landform stability, stable channel mitigation, and mass balance were confirmed. No geomorphic design was able to satisfy all three criteria when the permitted area of impact was maintained. Expanding the area of impact beyond permit boundaries promoted more success in meeting design criteria, but did not comply with reclamation regulations governing excess spoil placement and constructed hillslopes. A quantitative comparison of the groundwater movement and selenium desorption between alternative reclamation designs confirmed potential benefits to geomorphic reclamation. Selenium desorption was reduced by 23-39% in geomorphic fills and was attributed to improved groundwater movement. Geomorphic reclaimed landforms exhibited 23-45% lower infiltration volumes, 12-63% lower groundwater discharge volumes, and approximately 50% shorter groundwater residence times. These findings will be used to provide recommendations to government agencies and the surface mining industry on the practicality of implementing geomorphic reclamation as an alternative to conventional valley fill reclamation in central Appalachia.

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Section: Desorption Of Seleniummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geomorphic Landform Design as an Alternative for Conventional Valley Fill Surface Mine Reclamation: Assessing Conceptual Design, Groundwater Modeling, and Contaminant Desorption

DePriest¹

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“…It has been used in several industrial and environmental applications, e.g. for disintegrating the wastewater sludge (Khanal et al, 2007), surface cleaning of silica and mineral sands (Farmer et al, 2000;Zhao et al, 2007) and enhancing the leaching or extraction of inorganic and organic species from environmental samples (Luque-Garcıá and Luque de Castro, 2003;Pumure et al, 2009). In this study, a new technique was developed to investigate the physical stability of the bimodal composite by introducing cavitation effect through ultrasonication.…”

Section: Physical Stability Experimentsmentioning

confidence: 99%

Nitrogen-doped titanium dioxide supported on activated carbon for synergistic removal of aqueous organic pollutants

Yap¹

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“…Various other techniques using arsenic and selenium separation and preconcentration methods have been developed and reported to eliminate matrix interferences and improve sensitivity and accuracy for trace determinations. Some of these include ultrasonic extraction-HGAAS [77][78], thiol cotton fiber (TCF)-GFAAS [79][80], TCF-HGAAS [81], TCF-NAA [82], active carbon-GFAAS [83] and solvent extraction-GFAAS [84]. The TCF was originally developed for preconcentration of mercury, but has since been used to separate and preconcentrate many different elements [82].…”

Section: Arsenic and Selenium Speciation And Toxicitymentioning

confidence: 99%

Evaluation of Arsenic and Selenium Quantitation in Marcellus Shales and Flowback Saline Waters using Thiol Cotton Fibre-Graphite Furnace Atomic Absorption Spectroscopy and Diffusive Gradient in Thin Film Techniques

Balaba¹

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Accelerated aqueous leaching of selenium and arsenic from coal associated rock samples with selenium speciation using ultrasound extraction

Cited by 15 publications

References 30 publications

Geomorphic Landform Design as an Alternative for Conventional Valley Fill Surface Mine Reclamation: Assessing Conceptual Design, Groundwater Modeling, and Contaminant Desorption

Geomorphic Landform Design as an Alternative for Conventional Valley Fill Surface Mine Reclamation: Assessing Conceptual Design, Groundwater Modeling, and Contaminant Desorption

Nitrogen-doped titanium dioxide supported on activated carbon for synergistic removal of aqueous organic pollutants

Evaluation of Arsenic and Selenium Quantitation in Marcellus Shales and Flowback Saline Waters using Thiol Cotton Fibre-Graphite Furnace Atomic Absorption Spectroscopy and Diffusive Gradient in Thin Film Techniques

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