Evaluation of the Selectivity of Sequential Extraction Procedures Applied to the Speciation of Cadmium in Soils

Benítez, Norberto; Dubois, Jean-Pascal

doi:10.1080/03067319908031433

Cited by 48 publications

(42 citation statements)

References 29 publications

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“…An extraction protocol based on that developed by Benitez and Dubois (1999) and Cornu et al (2006) was used. However, in order to differentiate Mn oxides, which are very sensitive to variations in the redox conditions, from the various forms of Fe oxy-hydroxides, we added a step based on the work by Hall et al (1996a).…”

Section: Sequential Extractionmentioning

confidence: 99%

Impact of drainage on soil-forming mechanisms in a French Albeluvisol: Input of mineralogical data in mass-balance modelling

et al. 2008

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Research on soil pedogenesis has mainly focused on the long-term soil formation and has most often neglected recent soil evolutions in response to human practices. Such recent soil evolutions are however of considerable interest to study the timing of soil forming processes in response to changes in environmental conditions. In this paper, we model the Albeluvisol evolution in response to agricultural drainage. This was considered as a model case to study the velocity of mineralogical changes in soil as a result of eluviation and redox processes. We used a space-for-time substitution approach in combination with mass balance modelling based on mineralogical data in order to identify and characterise the mineralogical transformations responsible for the recent soil evolution in response to subsurface drainage. This approach allowed demonstrating that the main effects of subsurface drainage are (i) increasing precipitation of Mn oxides and Mn-rich ferrihydrite with decreasing distance to the drain as a result of the change in redox conditions and (ii) increasing loss of clay-sized oxides and smectites due to the enhanced eluviation in the vicinity of the drain. Both processes induce significant matter fluxes in comparison with those that occurred over the long-term soil formation. Nowadays, the precipitation of Mn oxides and Mn-rich ferrihydrite seems to still be active in the studied soil. On the opposite, the eluviation process appears less active than immediately after the drainage network installation, if not totally inactive. It thus demonstrates that some soil processes may have significant impact on the soil mineralogical composition even if they are only active over very short periods of time after a change in environmental conditions.

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Section: Sequential Extractionmentioning

confidence: 99%

Impact of drainage on soil-forming mechanisms in a French Albeluvisol: Input of mineralogical data in mass-balance modelling

et al. 2008

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“…Several chemical speciation and fractionation methods for heavy metal analysis in soils and sediments have been developed and applied (Benitez and Dubois 1999;Buccolieri et al 2004;Holyńska et al 2002;Ianni et al 2003;Lu et al 2003;Martínez et al 2005;Rivaro et al 2005). Tessier's sequential chemical extraction method is widely applied for chemical speciation of Fe, Mn, Cu, and Zn between various fractions in the sediments (Tessier et al 1979).…”

Section: Introductionmentioning

confidence: 98%

Speciative distribution and bioavailability of metals in agricultural soils receiving industrial wastewater

Tariq

Bashir

2011

Environ Monit Assess

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In order to assess the metal pollution status of agricultural lands of Mandi Bahauuddin receiving industrial wastewater, 35 top soil samples were investigated for the determination of selected metal levels, i.e., Fe, Cu, Cd, Cr, Ca, Ni, and Pb by flame atomic absorption spectroscopy under optimum analytical conditions. The distribution of these metals in different operationally defined chemical fractions was also determined by using the sequential extraction technique. The highest mean total concentration was found for Fe while the least one was observed for Pb. All the studied metals were found to be present at levels much enhanced than national and international standards. Moreover, most of the metals were distributed principally in residual fraction with the exception of Ni which was found to be associated mainly with oxidizable fraction. The significant correlations were observed between Fe-Mn oxide-bound and residual fractions and exchangeable and oxidizable fractions for most of the metals. The highest mobility was exhibited by Ni that evidenced its enhanced bioavailability in the soil. The multivariate statistical analyses in terms of principal component analysis (PCA) and cluster analysis (CA) revealed multiple sources for various geochemical fractions of different metals. CA also revealed that the nonresidual fractions of most of the metals were very closely associated while PCA presented a distinctive behavior of Ca in the soil. It was therefore suggested that in order to avoid the metal contamination arising from industrial wastewater, appropriate remediation strategies must be adopted.

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“…In practice however, the reagents are not perfectly selective, and different reagents used for extracting cadmium from the same soil component often yield differing results. The variation in results may be due to non-specificity and/or incomplete extraction (Jeng and Singh 1993;Benitez and Dubois 1999), influence of soil type, readsorption by other soil components, or precipitation following extraction (Nirel and Morel 1990;Ho and Evans 2000). Consequently, the various fractions of cadmium must be operationally defined according to the specific extraction procedure employed and according to the specific soil type.…”

Section: Introductionmentioning

confidence: 99%

“…The hydrated or amorphous oxides of iron and manganese are an important sink for heavy metals in soils (Jeng and Singh 1993;Benitez and Dubois 1999). Various extraction schemes have been developed which selectively target these components and include reagents such as ammonium oxalate and hydroxylamine hydrochloride.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Cadmium Distribution in Some Australian Krasnozems by Sequential Extraction

Butt

Dowling

Vinden

2007

Water Air Soil Pollut

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A sequential extraction procedure was used to investigate the influence of long-term phosphate fertilization on the distribution of cadmium throughout the major components of krasnozemic soils in the potato growing district located to the East of Ballarat, Victoria, Australia. The soil fractions investigated consisted of the water soluble, exchangeable, weakly bound to metal oxides, strongly bound to metal oxides, bound to organic material and residual. Other soil parameters, such as pH H2O , pH CaCl2 , electrolytical conductivity and total organic material were investigated. The concentrations of Ca, Mg, Fe, Mn and Zn in each soil fraction were also measured. The total concentration of cadmium in the farmed soils had increased from the background level of 100.5 μg/kg to an average of 210 μg/kg. The proportion of cadmium available or potentially available for plant uptake was very low. On average, 89% of the cadmium in the farmed soils had been adsorbed by amorphous metal oxides and organic material, or was associated with silicates, and is therefore unavailable for plant uptake. The metal oxides adsorbed the highest proportion of cadmium.

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Evaluation of the Selectivity of Sequential Extraction Procedures Applied to the Speciation of Cadmium in Soils

Cited by 48 publications

References 29 publications

Impact of drainage on soil-forming mechanisms in a French Albeluvisol: Input of mineralogical data in mass-balance modelling

Impact of drainage on soil-forming mechanisms in a French Albeluvisol: Input of mineralogical data in mass-balance modelling

Speciative distribution and bioavailability of metals in agricultural soils receiving industrial wastewater

Assessment of Cadmium Distribution in Some Australian Krasnozems by Sequential Extraction

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