The effects of grinding methods on metals concentrations in soil

Felt, Deborah R.; Bednar, Anthony J.; Georgian, Thomas

doi:10.1016/j.talanta.2008.06.039

Cited by 19 publications

(9 citation statements)

References 6 publications

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“…Higher concentrations of Si were found in samples collected from the lower trays of the BSNEs (Figure 2), which contained 40–60% volume of sand‐sized (100–1000 μm diameter) particles, suggesting that Si concentrations were higher in the coarser particles than finer particles. Elements such as Al, Fe, K, Mn and Ti, that bind in silicate structures are not completely released or dissolved in digests by common mineral acids (Felt et al. 2008, Shafer et al.…”

Section: Resultsmentioning

confidence: 99%

Intercomparison of PIXE and ICP‐AES Analyses of Aeolian Dust from Owens (Dry) Lake, California

Rojo

Barnes

Gill

2011

Geostandard Geoanalytic Res

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Particle-induced X-ray emission (PIXE) and ICP-AES can be combined to obtain a wider range of detected elements, augment previous data and ⁄ or to verify measured concentrations of heavy and trace metals in geological samples. Intercomparison of data sets generated by multiple techniques is challenging due to the differing processes and methods of each technique. Here, we compare elemental data obtained by both techniques for aeolian dust from Owens (Dry) Lake, California. Nineteen elements were detected by PIXE, sixteen by ICP-AES and ten elements were detected by both techniques. Statistical analyses of data set groupings illustrated which parameters differed significantly between PIXE and ICP-AES. Relative variation (%) showed that PIXE gave higher concentrations than ICP-AES for Al, As, Cu, Fe, K, Mn, Ni, Sr, Ti and Zn in all samples. For As, Cu, Sr and Zn, relative variation was variable between the techniques. PIXE detection limits exceeded ICP-AES concentrations for Ba, Cd, Co, Cr, Pb and Mo. Low ICP-AES percentage recoveries of Al, Fe, K, Mn and Ti for NIST SRM 2710 indicated incomplete dissolution during digestion (EPA Method 3050B), since elements were bound in silicate structures. Variability between the two data sets is explained by differences between analytical techniques, sample preparation methods and ⁄ or variability in sample matrices.

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Section: Resultsmentioning

confidence: 99%

Intercomparison of PIXE and ICP‐AES Analyses of Aeolian Dust from Owens (Dry) Lake, California

Rojo

Barnes

Gill

2011

Geostandard Geoanalytic Res

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“…Aqueous samples for elemental speciation were also filtered through a 0.45 lm syringe filter prior to preservation and dilution with 0.25 mM EDTA solution (Bednar et al, 2002(Bednar et al, , 2004Bednar et al, 2009). Solid samples were air dried, ground, and sieved to pass a #40 ASTM sieve (Felt et al, 2008) and then digested following Method 3050B (USEPA, 2007).…”

Section: Sample Preparationmentioning

confidence: 99%

“…Many elements decrease in concentration from the Emory River fly ash to the recovery ditch fly ash; however, arsenic, iron, and manganese increase (cadmium, chromium, and molybdenum increase slightly, but are likely within the typical replicate error of the analytical procedures; Felt et al, 2008). Particle fractionation could partially explain the relative increase in iron and manganese, which could also affect sorbed or co-precipitated phases in the ash recovery ditch material (e.g., arsenic), as this sample was collected near the end of the recovery ditch where time for partitioning, sorption, and settling was the greatest.…”

Section: Field Water and Fly Ash Analysesmentioning

confidence: 99%

Geochemical investigations of metals release from submerged coal fly ash using extended elutriate tests

Bednar¹,

Chappell²,

Seiter³

et al. 2010

Chemosphere

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a b s t r a c tA storage pond dike failure occurred at the Tennessee Valley Authority Kingston Fossil Plant that resulted in the release of over 3.8 million cubic meters (5 million cubic yards) of fly ash. Approximately half of this material deposited in the main channel of the Emory River, 3.5 km upstream of the confluence of the Emory and Clinch Rivers, Tennessee, USA. Remediation efforts to date have focused on targeted removal of material from the channel through hydraulic dredging, as well as mechanical excavation in some areas. The agitation of the submerged fly ash during hydraulic dredging introduces river water into the fly ash material, which could alter the redox state of metals present in the fly ash and thereby change their sorption and mobility properties. A series of extended elutriate tests were used to determine the concentration and speciation of metals released from fly ash. Results indicated that arsenic and selenium species released from the fly ash materials during elutriate preparation were redox stable over the course of 10 d, with dissolved arsenic being present as arsenate, and dissolved selenium being present as selenite. Concentrations of certain metals, such as arsenic, selenium, vanadium, and barium, increased in the elutriate waters over the 10 d study, whereas manganese concentrations decreased, likely due to oxidation and precipitation reactions.Published by Elsevier Ltd.

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“…The W-composite shots had been used on one of the ranges and the W-composite shots were scheduled to be used on the other range. The third soil, a Silt soil type (Loess) was included as a reference soil that has been well characterized and is used by researchers at the US Army Engineer Research and Development Center (Davis et al, 2007;Griggs et al, 2007;Felt et al, 2008).…”

Section: Study Soilsmentioning

confidence: 99%

Relationship of surface changes to metal leaching from tungsten composite shot exposed to three different soil types

et al. 2011

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a b s t r a c tPhysical changes that occur on the surface of fired shots due to firing and impact with soil may increase the dissolution of muniton metals. Increased metal dissolution could potentially increase metal transport and leaching, affecting metal concentrations in surface and groundwater. This research describes the relationship between the surface changes on fired tungsten-nickel-iron (94% W:2% Ni:4% Fe) composite shots and metals leaching from those shots. Tungsten composite shot was fired into, and aged in, three soil types (Silty Sand, Sandy Clay, and Silt) in mesoscale rainfall lysimeters to simulate live-fire conditions and subsequent interactions between the metals of the composite and soil. Leachate, runoff, and soil samples were collected from the lysimeters and analyzed for metal content. The shots were analyzed using scanning electron microscopy (SEM) to evaluate surface changes. SEM results indicated that a soil's particle size distribution initially affected the amount of metal that was sheared from the surface of the fired W-composite shots. Shearing was greatest in soils with larger soil particles (sand and gravel); shearing was least in soils composed of small soil particles (fines). Increased metallic shearing from the shot's surface was associated with increased W dissolution, compared to controls, following a simulated 1 year soil aging.Published by Elsevier Ltd.

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The effects of grinding methods on metals concentrations in soil

Cited by 19 publications

References 6 publications

Intercomparison of PIXE and ICP‐AES Analyses of Aeolian Dust from Owens (Dry) Lake, California

Intercomparison of PIXE and ICP‐AES Analyses of Aeolian Dust from Owens (Dry) Lake, California

Geochemical investigations of metals release from submerged coal fly ash using extended elutriate tests

Relationship of surface changes to metal leaching from tungsten composite shot exposed to three different soil types

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