Arsenic fractionation in soils using an improved sequential extraction procedure

Wenzel, Walter W.; Kirchbaumer, Natalie; Prohaska, Thomas; Stingeder, Gerhard; Lombi, Enzo; Adriano, D. C.

doi:10.1016/s0003-2670(01)00924-2

Cited by 1,198 publications

(574 citation statements)

References 35 publications

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“…Pseudo-total concentrations of elements were assayed after HNO 3 :H 2 O 2 digestion in an autoclave (Wenzel et al, 2001). Extracts were filtered (num.…”

Section: Chemical Analysesmentioning

confidence: 99%

Screening risk assessment tools for assessing the environmental impact in an abandoned pyritic mine in Spain

Moreno-Jiménez

García‐Gómez

Oropesa

et al. 2011

Science of The Total Environment

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El acceso a la versión del editor puede requerir la suscripción del recurso Access to the published version may require subscription This paper describes a new methodology for assessing site-specific environmental impact of contaminants. The proposed method integrates traditional risk assessment approaches with real and variable environmental characteristics at a local scale. Environmental impact on selected receptors was classified for each environmental compartment into 5 categories derived from the whole (chronic and acute) risk assessment using 8 risk levels. Risk levels were established according to three hazard quotients (HQs) which represented the ratio of exposure to acute and chronic toxicity values. This tool allowed integrating in only one impact category all the elements involved in the standard risk assessment. The methodology was applied to an abandoned metal mine in Spain, where high levels of As, Cd, Zn and Cu were detected. Risk affecting potential receptors such as aquatic and soil organisms and terrestrial vertebrates were assessed. Whole results showed that impact to the ecosystem is likely high and further investigation or remedial actions are necessary. Some proposals to refine the risk assessment for a more realistic diagnostic are included.Published by Elsevier B.V.

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“…Pseudo-total concentrations of elements were assayed after HNO 3 :H 2 O 2 digestion in an autoclave (Wenzel et al, 2001). Extracts were filtered (num.…”

Section: Chemical Analysesmentioning

confidence: 99%

Screening risk assessment tools for assessing the environmental impact in an abandoned pyritic mine in Spain

Moreno-Jiménez

García‐Gómez

Oropesa

et al. 2011

Science of The Total Environment

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“…An improved sequential extraction proposed by Wenzel et al (2001) was adopted for this study. Soil (1 g) was extracted sequentially with 25 ml of (NH 4 ) 2 SO 4 (0.05 M), (NH 4 ) 2 H 2 PO 4 (0.05 M), NH 4 -oxalate (0.2 M), and NH 4 -oxalate (0.2 M)-ascorbic acid (0.1 M), and finally with aqua regia and perchloric acid.…”

Section: Procedures For the Sequential Extraction Of Soil Asmentioning

confidence: 99%

“…This fraction is assumed to consist of easily exchangeable, outer-sphere complexes of As (Wenzel et al, 2001). In the case of the YJ and HN soils, very little of the added As appeared in this fraction, even at d 1 (Table 2).…”

Section: Effect Of Ageing On the Distribution Of As Between Differentmentioning

confidence: 99%

“…The decreases occurred generally faster (within one week) for the YJ and HN soils compared with the CC and NJ soils (within one month). According to Wenzel et al (2001), (NH 4 ) 2 H 2 PO 4 extracts varied proportions of inner-sphere surface complexes of As, depending on the ionic strength of the solution.…”

Section: Effect Of Ageing On the Distribution Of As Between Differentmentioning

confidence: 99%

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The ageing effect on the bioaccessibility and fractionation of arsenic in soils from China

et al. 2007

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Ingestion of contaminated soil has been recognized as an important exposure pathway of arsenic for humans, especially for children through outdoor hand-to-mouth activities. An improved sequential extraction procedure was employed in an attempt to reveal the relationship between bioaccessibility and fractionation of As in five soils from China. Arsenic bioaccessibility in acidic (%pH 4.5) soils reached approximately stable levels after a sharp decline within one week of ageing. In contrast, As bioaccessibility in higher pH (>6.0) soils was found to be significantly higher and took two weeks of ageing to reach stable levels. The artificially added As was more labile than indigenous As. The main proportions of added As were found in the specifically sorbed and amorphous and poorly-crystalline hydrous Fe/Al oxide-bound fractions. Correlation analysis shows that the non-specifically and specifically sorbed As are likely to constitute the main proportion of bioaccessible soil As. The soil content of amorphous and crystalline Fe/Al oxides and soil pH appear to be the key factors controlling, not only the time needed to reach a steady state, but also the magnitude of the bioaccessibility of As added to the soils.

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“…As(III) is more soluble, mobile, and toxic than As(V), which is the dominant and more stable form in aerobic soils. Although the minerals and compounds of As are relatively soluble, most of the As found in soil is neither particularly mobile nor available, because it is, in general, strongly associated with Fe, Mn, and Al oxides in acid soils and with Ca in alkaline and calcareous soils [1,3,5].…”

Section: Introductionmentioning

confidence: 99%

Arsenic present in the soil‐vine‐wine chain in vineyards situated in an old mining area in Trentino, Italy

Bertoldi

Villegas

Larcher

et al. 2013

Enviro Toxic and Chemistry

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Abstract-The present study follows arsenic (As) transfer through the chain of soil-vine-leaves-grapes-wine to assess the possible risk of arsenic intake related to consuming grapes and wines produced in 10 vineyards located in a mining area rich in this element. The results are compared with date from 18 uncontaminated areas. In the soil, the content of As extracted with acqua regia and that extracted with ammonium acetate, were analyzed. Leaves and berries were analyzed after washing with acidified aqueous solution and acid mineralization in a closed vessel, whereas wines were simply diluted before analysis. All analyses were performed using an inductively coupled plasma mass-spectrometer. The aqua regia extractable As concentration in soil ranged from 3.7 to 283 mg/kg, whereas available As varied from 18 to 639 mg/kg, and As total concentration ranged from 16.3 to 579 mg/kg dry weight in leaves and from <0.1 to 36.8 mg/kg dry weight in grapes. Arsenic levels in wines were always below 1.62 mg/L, with higher concentration in red wines than in white wines. Significant and positive correlations between the As concentrations in soils, leaves, and berries are highlighted, with the samples collected near the mining area having significantly higher values. Nevertheless, As levels in wines were always well below the limit (200 mg/L) suggested by the International Organization of Vine and Wine. Environ. Toxicol. Chem. 2013;32:773-779. # 2013 SETAC

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Arsenic fractionation in soils using an improved sequential extraction procedure

Cited by 1,198 publications

References 35 publications

Screening risk assessment tools for assessing the environmental impact in an abandoned pyritic mine in Spain

Screening risk assessment tools for assessing the environmental impact in an abandoned pyritic mine in Spain

The ageing effect on the bioaccessibility and fractionation of arsenic in soils from China

Arsenic present in the soil‐vine‐wine chain in vineyards situated in an old mining area in Trentino, Italy

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