Bioavailability as a Factor in Risk Assessment of Metal-Contaminated Soil

Chapman, E. Emily V.; Dave, Göran; Murimboh, John

doi:10.1007/s11270-012-1074-z

Cited by 19 publications

(7 citation statements)

References 31 publications

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“…It is well established that knowledge about the total concentrations of mineral elements in soil is not sufficient to infer solute mobility or availability to plants . Therefore, a range of chemical soil extraction procedures are used to measure the bioavailable fraction of nutrients or contaminants.…”

Section: Dgt and Chemical Imagingmentioning

confidence: 99%

“…1 Therefore, a range of chemical soil extraction procedures are used to measure the bioavailable fraction of nutrients or contaminants. Some of these methods allow for the estimation of labile (readily soluble) solute fractions which are assumed to be indicators for plant availability.…”

mentioning

confidence: 99%

“…It is well established that knowledge about the total concentrations of mineral elements in soil is not sufficient to infer solute mobility or availability to plants. 1 Therefore, a range of chemical soil extraction procedures are used to measure the bioavailable fraction of nutrients or contaminants. Some of these methods allow for the estimation of labile (readily soluble) solute fractions which are assumed to be indicators for plant availability.…”

mentioning

confidence: 99%

“…As previously suggested, 10,12 mechanisms of nutrient and contaminant uptake and, in some cases release, can be inferred from such chemical images. 13 High-resolution chemical images of labile solutes in soils and sediments can be generated by several DGT-based approaches, i.e., (1) slicing of the gel to small pieces and measuring them individually after elution, 14,15 (2) computer imaging densitometry (CID), 8,16,17 and (3) laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). 8,9,18 The method of gel slicing, individual elution, and measurement of each gel piece is low-cost but tedious.…”

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confidence: 99%

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Gel for Simultaneous Chemical Imaging of Anionic and Cationic Solutes Using Diffusive Gradients in Thin Films

et al. 2013

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We report on a novel gel based on diffusive gradients in thin films (DGT) for the simultaneous measurement of cations and anions and its suitability for high resolution chemical imaging by using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS). The new high resolution mixed binding gel (HR-MBG) is based on zirconium-hydroxide and suspended particulate reagent-iminodiacetate (SPR-IDA) as resin materials which are embedded in an ether-based urethane polymer hydrogel. The use of this polymer hydrogel material allows the production of ultrathin, highly stable and tear-proof resin gel layers with superior handling properties compared to existing ultrathin polyacrylamide gels. The gel was characterized regarding its uptake kinetics, the anion and cation capacities, and the effects of pH, ionic strength, and aging on the performance of the HR-MBG. Our results demonstrate the capability of this novel gel for concomitant sampling of anions and cations. The suitability of this new gel type for DGT chemical imaging at submm spatial resolution in soils using LA-ICPMS is shown. 2D images of P, As, Co, Cu, Mn, and Zn distributions around roots of Zea mays L. demonstrate the new opportunities offered by the HR-MBG for high-resolution mapping of solute dynamics in soil and sediment hotspots, such as the rhizosphere, by simultaneous observation of anionic and cationic solute species.

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Section: Dgt and Chemical Imagingmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Gel for Simultaneous Chemical Imaging of Anionic and Cationic Solutes Using Diffusive Gradients in Thin Films

et al. 2013

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“…Based on recent reports, the toxicity of metals in soils is more closely related to the metal concentration or metal ion activity in the soil solution in particular than to the total metal concentration in the bulk soil (McGrath et al, 1999;Kabata-Pendias, 2011;Korzeniowska and Stanislawska-Glubiak, 2013). Despite the fact that many soils contaminated by industrial emissions have total metal concentrations above guideline values, few or no significant effects have ever been observed on plant growth (Chapman et al, 2012;Diatta, 2013;Jaworska et al, 2013;Medynska et al, 2009;Wlasniewski and Hajduk, 2012). Metal concentrations determined in dried and homogenized soil are not necessarily representative of in situ conditions.…”

Section: Introductionmentioning

confidence: 99%

Variability and relationships between Pb, Cu, and Zn concentrations in soil solutions and forest floor leachates at heavily polluted sites

Kabała

Karczewska

Medyńska‐Juraszek

2014

J. Plant Nutr. Soil Sci.

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Seasonal variability of Cu, Pb, and Zn concentrations in litter leachates and soil solutions was examined in an afforested zone surrounding a copper smelter in SW Poland. Litter leachates (with zero-tension lysimeters) and soil solutions (with MacroRhizon suction-cup samplers, installed at a depth of 25-30 cm) were collected monthly at three sites differing in contamination levels in the years 2009 and 2010 (total Cu: 2380, 439, and 200 mg kg -1 , respectively). Concentrations of Cu in the litter leachate were correlated with dissolved organic C (DOC), whereas Zn and Pb were mainly related to leachate pH. Metal concentrations in the soil solution were weakly influenced by their total content in soils and the monthly fluctuations reached 300, 600, and 700% for Cu, Pb, and Zn, respectively. Metal concentrations in soil solutions (Cu 110-460 lg L -1 ; Zn 20-1190 lg L -1 ; Pb 0.5-36 lg L -1 ) were correlated with their contents in the litter leachates. Chemical speciation, using Visual Minteq 3.0, proved organically-complexed forms even though the correlations between metal concentrations and soil solution pH and DOC were statistically insignificant. The flux of organically-complexed metals from contaminated forest floors is believed to be a direct and crucial factor affecting the actual heavy metal concentrations and their forms in the soil solutions of the upper mineral soil horizons.Key words: soil solution / metal fluxes / heavy metals / forest litter / dissolved organic carbon / metal speciation

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Diffusive gradients in thin films for the measurement of labile metal species in water and soils: a review

et al. 2021

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The determination of the concentration of an environmental pollutant is not sufficient to assess the related health risk because this pollutant may not be bioavailable. Therefore, methods to determine pollutant bioavailability are more relevant to assess toxicity than measuring the total concentration. For instance, the diffusive gradient in thin films (DGT) is an in situ dynamic technique used to measure the concentration of labile compounds in the environment. Here we review the latest developments achieved in speciation and bioavailability of metals and metalloids using this technique. We detail the technique, common binding agents and diffusive gels. We give laboratory procedures to prepare the gels, and we explain calculations using the DGT-induced fluxes in soils (DIFS) modeling. DIFS models can predict the resupply capacities from soils to porewater, and the uptake of trace elements by plants. Procedures for in situ field deployments, including issues of biofilm growth, are also discussed.

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Bioavailability as a Factor in Risk Assessment of Metal-Contaminated Soil

Cited by 19 publications

References 31 publications

Gel for Simultaneous Chemical Imaging of Anionic and Cationic Solutes Using Diffusive Gradients in Thin Films

Gel for Simultaneous Chemical Imaging of Anionic and Cationic Solutes Using Diffusive Gradients in Thin Films

Variability and relationships between Pb, Cu, and Zn concentrations in soil solutions and forest floor leachates at heavily polluted sites

Diffusive gradients in thin films for the measurement of labile metal species in water and soils: a review

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