An investigation of radionuclide uptake into food crops grown in soils treated with bauxite mining residues

Cooper, Mick; Clarke, P. C.; Robertson, William O.; McPharlin, I. R.; Jeffrey, R. C.

doi:10.1007/bf02038437

Cited by 31 publications

(10 citation statements)

References 7 publications

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“…Linsalata (1986) did not find a significant difference in 226 Ra and 228 Ra TF averaged for a series of crops grown at the Poços de Caldas plateau (Brazil). For present database, considering those studies where both 226 Ra and 228 Ra were measured (Paul and Pillai, 1986;Linsalata, 1986;Cooper et al, 1995), an overall 2.5-fold higher TF was found for 228 Ra (GM: 0.035; GSD: 5.5) than for 226 Ra (GM: 0.013; GSD: 5.9). For a large number of crops (maize, brown beans, manioc, carrot, lettuce, grasses, herbs) no significant difference in TF for both isotopes was recorded.…”

Section: Radiummentioning

confidence: 61%

Proposal for new best estimates of the soil-to-plant transfer factor of U, Th, Ra, Pb and Po

Vandenhove

Olyslaegers

Санжарова

et al. 2009

Journal of Environmental Radioactivity

132

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Section: Radiummentioning

confidence: 61%

Proposal for new best estimates of the soil-to-plant transfer factor of U, Th, Ra, Pb and Po

Vandenhove

Olyslaegers

Санжарова

et al. 2009

Journal of Environmental Radioactivity

132

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“…Part of our ongoing investigations is to understand the chemistry and mineralogical distribution of trace elements in bauxite residues and the effects from the Bayer Process. In the parent ore material, Cr, V, and As are potentially toxic trace metals that occur alongside small concentrations of the naturally occurring radioactive materials uranium ( 238 U) and thorium ( 228 Th) (Ball and Gilkes, 1987; Anand et al, 1991; Cooper et al, 1995). Chromium and V concentrations in Darling Range bauxite can be as high as 1200 mg kg −1 (Ball and Gilkes, 1987; Anand et al, 1991).…”

Section: Sample Backgroundmentioning

confidence: 99%

Combined Application of QEM‐SEM and Hard X‐ray Microscopy to Determine Mineralogical Associations and Chemical Speciation of Trace Metals

et al. 2011

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We describe the application of quantitative evaluation of mineralogy by scanning electron microscopy in combination with techniques commonly available at hard X-ray microprobes to define the mineralogical environment of a bauxite residue core segment with the more specific aim of determining the speciation of trace metals (e.g., Ti, V, Cr, and Mn) within the mineral matrix. Successful trace metal speciation in heterogeneous matrices, such as those encountered in soils or mineral residues, relies on a combination of techniques including spectroscopy, microscopy, diffraction, and wet chemical and physical experiments. Of substantial interest is the ability to define the mineralogy of a sample to infer redox behavior, pH buffering, and mineral-water interfaces that are likely to interact with trace metals through adsorption, coprecipitation, dissolution, or electron transfer reactions. Quantitative evaluation of mineralogy by scanning electron microscopy coupled with micro-focused X-ray diffraction, micro-X-ray fluorescence, and micro-X-ray absorption near edge structure (mXANES) spectroscopy provided detailed insights into the composition of mineral assemblages and their effect on trace metal speciation during this investigation. In the sample investigated, titanium occurs as poorly ordered ilmenite, as rutile, and is substituted in iron oxides. Manganese's spatial correlation to Ti is closely linked to ilmenite, where it appears to substitute for Fe and Ti in the ilmenite structure based on its mXANES signature. Vanadium is associated with ilmenite and goethite but always assumes the +4 oxidation state, whereas chromium is predominantly in the +3 oxidation state and solely associated with iron oxides (goethite and hematite) and appears to substitute for Fe in the goethite structure.

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“…The levels of some metals and naturally occurring radioactive materials (e.g., thorium and uranium) in red mud are concentrated during bauxite processing (Cooper et al, 1995;Summers & Pech, 1997), and this has been considered a potential problem when red mud is applied to soils at reasonably high rates (e.g., 50-200 kg ha −1 ) (Paramguru et al, 2005). However, in reality, metals are tightly bonded to red mud surfaces (Santona et al, 2006).…”

Section: Red Mudmentioning

confidence: 99%

Sorption of Heavy Metals by Inorganic and Organic Components of Solid Wastes: Significance to Use of Wastes as Low-Cost Adsorbents and Immobilizing Agents

Zhou

Haynes

2010

Critical Reviews in Environmental Science and Technology

205

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Reactions involved in the sorption of heavy metal cations and an-ions to the surfaces of inorganic and organic components of solid wastes are examined. The properties of various waste materials (e.g., fly ash, slag, red mud, water treatment sludge, fungal and bacterial biomass, tree bark, sawdust, paper mill sludge, seafood processing waste, and composted organics) and the use of these materials as heavy metal sorbents, in situ immobilizing agents, and stabilization-solidification agents are then reviewed and discussed. Specific adsorption/surface precipitation onto various mineral phases present on composite inorganic waste materials explains the capacity of such materials to sorb metals. Similarly, reactions of various functional groups (e.g., carboxyl, amine, hydroxyl, sulphydryl) on organic molecules (e.g., lignin, chitin, humic substances) with heavy metals explain the sorption capacities of biosorbents. Differences in operational parameters between studies make a comparison of sorption capacities between materials difficult. Ease of desorption is also an important consideration, because in the treatment of wastewaters, materials are used primarily as ion exchangers, while for in situ immobilization, the metals need to be irreversibly bound to the added adsorbent. In the future, there is a need to develop low-cost sorbents with a wide range of metal affinities (through the combination of several waste sorbent materials) that can remove a variety of metal ions from solution from multielement-contaminated waters or soils.

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An investigation of radionuclide uptake into food crops grown in soils treated with bauxite mining residues

Cited by 31 publications

References 7 publications

Proposal for new best estimates of the soil-to-plant transfer factor of U, Th, Ra, Pb and Po

Proposal for new best estimates of the soil-to-plant transfer factor of U, Th, Ra, Pb and Po

Combined Application of QEM‐SEM and Hard X‐ray Microscopy to Determine Mineralogical Associations and Chemical Speciation of Trace Metals

Sorption of Heavy Metals by Inorganic and Organic Components of Solid Wastes: Significance to Use of Wastes as Low-Cost Adsorbents and Immobilizing Agents

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