Magnetic Separation for Environmental Remediation

Schake, Ann R.; Avens, Larry R.; Padilla, D. D.; Romero, David A.; Worl, Laura A.; Prenger, F. C.; Hill, Daniel; Tolt, Thomas L.

doi:10.1007/978-1-4899-1406-4_18

Cited by 10 publications

(5 citation statements)

References 7 publications

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“…No peixe, o cromo apresenta efeitos adversos no rim e fígado, mesmo em menores concentrações o cromo hexavalente pode se depositar nas brânquias e causar sua morte (GUPTA et al, 2019;TUMOLO et al, 2020;MONGA;FULKE;DASGUPTA, 2022) O cromo pode sofrer influência direta de pH, interferindo no processo absortivo de Cr O íon Cu 2+ possui forte tendência para formar complexos, alguns quelatos de interesse analítico com sistemas reativos orgânicos, como ditioxamida e α-benzoinoxima (cuprón). A grande utilização deste metal é na indústria elétrica devido sua alta condutividade, porém também é aproveitada em outros setores como na agricultura para fungicidas, em dutos de água por causa de sua inércia química e em ligas metálicas (LEE, 1996;MEENA et al, 2005;SCHAKE, 1987).…”

Section: Cromo (Cr)unclassified

Toxic effects of Cr, Cu, Se, Cd, Hg and Pb ions on the environment and human health: a review

Guimaraes Miranda,

Cabral Silva Pimentel,

Coelho Moreira Gomes

et al. 2023

CLIUM

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The presence of potentially toxic cations and anions in the environment has become a global problem, mainly due to their high toxicity and ability to bioaccumulate/biomagnify. Although elements considered toxic may occur naturally, human activities contribute significantly to increasing the concentration of these substances in ecosystems. In this context, this review addresses details of the disposition of mercury (Hg), lead (Pb), cadmium (Cd), chromium (Cr), selenium (Se) and copper (Cu) ions in soils and water bodies, as well as the consequences of the presence of these ions to human health and the environment. In small amounts, part of these elements are considered essential and with established and significant functions in several biological processes, but in high concentrations they can cause serious damage to human health.

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Section: Cromo (Cr)unclassified

Toxic effects of Cr, Cu, Se, Cd, Hg and Pb ions on the environment and human health: a review

Guimaraes Miranda,

Cabral Silva Pimentel,

Coelho Moreira Gomes

et al. 2023

CLIUM

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“…In another study by Los Alamos 18 , about 85% of the plutonium were removed from the flow stream. However, about 30% of the soil mass was also caught up in the separator.…”

Section: Magnetic Separationmentioning

confidence: 99%

Technical Evaluation of Remediation Technologies for Plutonium-Contaminated Soils at the Nevada Test Site (Nts)

Hoeffner¹

2003

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The Clemson Environmental Technologies Laboratory (CETL) was contracted by the National Energy Technology Center to evaluate technologies that might be used to reduce the volume of plutonium-contaminated soil at the Nevada Test Site.The project has been systematically approached.A thorough review and summary was completed for:1) The NTS soil geological, geochemical and physical characteristics 2) The characteristics and chemical form of the plutonium that is in these soils 3) Previous volume reduction technologies that have been attempted on the NTS soils 4) Vendors with technology that may be applicable 5) Related needs at other DOE sites Soils from the Nevada Test Site were collected and delivered to the CETL. Soils were characterized for Pu-239/240, Am-241 and gross alpha. In addition, wet sieving and the subsequent characterization were performed on soils before and after attrition scrubbing to determine the particle size distribution and the distribution of Pu-239/240 and gross alpha as a function of particle size. Sequential extraction was performed on untreated soil to provide information about how tightly bound the plutonium was to the soil. Magnetic separation was performed to determine if this could be useful as part of a treatment approach.Using the information obtained from these reviews, three vendors were selected to demonstration their volume reduction technologies at the CETL. Two of the three technologies, bioremediation and soil washing, met the performance criteria. Both were able to significantly reduce the concentration plutonium in the soil from around 1100 pCi/g to 200 pCi/g or less with a volume reduction of around 95%, well over the target 70%. These results are especially encouraging because they indicate significant improvement over that obtained in these earlier pilot and field studies. Additional studies are recommended.

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“…Thus, separation of metal oxides such as UO, from clays and silica is possible with high efficiency (Chaiko et al, 1993). Finally, magnetic (Schake et al, 1994) and density separation techniques were evaluated for the selective removal of residual U(1V) phases present in chemically treated soils.…”

Section: Contaminantsmentioning

confidence: 99%

Characterizing soils contaminated with heavy metals: A uranium contamination case study

Tidwell

Morris

Cunnane

et al. 1996

Remediation Journal

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To stem rising remediation costs for soils contaminated with hazardous metals, increased emphasis is being placed on the development of in‐situ and ex‐situ treatment technologies. Often, a lack of basic information on the chemical and physical characteristics of the soil and contaminants hampers treatability studies used to design these technologies. This article proposes and demonstrates a characterization program to meet these information needs, employing standard analytical techniques coupled with advanced spectroscopy and microscopy techniques. To support treatments involving physical separation strategies, the program uses standard analytical techniques to characterize the soil and the association of contaminants with different soil fractions (e.g., size and density fractions). Where chemical treatments are required, spectroscopy and microscopy methods are employed to yield quantitative information on the oxidation state and speciation of the contaminant. Examples demonstrate the use of measured soil and contaminant characteristics in the screening of alternative treatment technologies and in the selection of soils for use in treatability studies. Also demonstrated is the use of these characterization tools in the design and optimization of treatment strategies and in support of risk assessment determinations.

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Magnetic Separation for Environmental Remediation

Cited by 10 publications

References 7 publications

Toxic effects of Cr, Cu, Se, Cd, Hg and Pb ions on the environment and human health: a review

Toxic effects of Cr, Cu, Se, Cd, Hg and Pb ions on the environment and human health: a review

Technical Evaluation of Remediation Technologies for Plutonium-Contaminated Soils at the Nevada Test Site (Nts)

Characterizing soils contaminated with heavy metals: A uranium contamination case study

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