Solid phase speciation of arsenic by sequential extraction in standard reference materials and industrially contaminated soil samples

Herreweghe, Samuel Van; Swennen, Rudy; Vandecasteele, Carlo; Cappuyns, Valérie

doi:10.1016/s0269-7491(02)00332-9

Cited by 198 publications

(108 citation statements)

References 54 publications

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“…Transformation efficiency of F4 fraction to F1 and F2 fractions followed the order NPK + M > M > NP > NPK > N (except for the treatment of 0 mg/kg additional As which followed N > NP > NPK). The As recovery ratio of BCR-SEPs ranged from 91.34 to 99.52 %, 90.78 to 102.80 %, and 90.27 to 93.59 % at 0, 50, and 100 mg/kg addition levels of As, respectively, which showed completely acceptable quality control of As in this sequential extraction procedure (Van Herreweghe et al 2003). …”

Section: Resultsmentioning

confidence: 77%

The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

Hou

et al. 2014

Appl Microbiol Biotechnol

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An Escherichia coli arsRp::luc-based biosensor was constructed to measure the bioavailability of arsenic (As) in soil. In previous induction experiments, it produced a linear response (R 2 =0.96, P<0.01) to As from 0.05 to 5 μmol/L after a 2-h incubation. Then, both chemical sequential extraction, Community Bureau of Reference recommended sequential extraction procedures (BCR-SEPs) and E. coli biosensor, were employed to assess the impact of different long-term fertilization regimes containing N, NP, NPK, M (manure), and NPK+ M treatments on the bioavailability of arsenic (As) in soil. Per the BCR-SEPs analysis, the application of M and M+NPK led to a significant (P<0.01) increase of exchangeable As (2-7 times and 2-5 times, respectively) and reducible As (1.5-2.5 times and 1.5-2.3 times, respectively) compared with the no fertilization treated soil (CK). In addition, direct contact assay of E. coli biosensor with soil particles also supported that bioavailable As in manure-fertilized (M and M+NPK) soil was significantly higher (P<0.01) than that in CK soil (7 and 9 times, respectively). Organic carbon may be the major factor governing the increase of bioavailable As. More significantly, E. coli biosensor-determined As was only 18.46-85.17 % of exchangeable As and 20.68-90.1 % of reducible As based on BCR-SEPs. In conclusion, NKP fertilization was recommended as a more suitable regime in As-polluted soil especially with high As concentration, and this E. coli arsRp::luc-based biosensor was a more realistic approach in assessing the bioavailability of As in soil since it would not overrate the risk of As to the environment.

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Section: Resultsmentioning

confidence: 77%

The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

Hou

et al. 2014

Appl Microbiol Biotechnol

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“…2), suggesting that Bio-HMs were contributed by various forms of HMs in soils except the residue, which was bound to the inner crystal lattice in the minerals in soils, thus could hardly be mobilized (Ko et al 2005;Luo et al 2012a;Tessier et al 1979). However, for Cu, the R-Bio-HMs were evidently greater than the three combined BCR fractions, suggesting that Cu in soils could be easily mobilized and become accessible to biota in soils and human who ingest the soils (Van Herreweghe et al 2003;Wu et al 2015). For Pb and Zn, the R-Bio-HMs were generally less than the combined first two steps of BCR extracted forms, indicating that the organic complexion and residue forms of HMs contributed little to the bioaccessibility of HMs in soils.…”

Section: Discussionmentioning

confidence: 99%

“…Subsequently, this scheme was improved as a result of further collaborative studies (Rauret et al 1999). In this study, a revised version of the BCR sequential extraction procedure was used to test the HM phases (Baig et al 2009;Rauret et al 1999;Van Herreweghe et al 2003). In brief, the forms of HMs were classified into exchangeable (water and acid-soluble, F1), easily reduced (Fe/Mn oxyhydroxides, F2), oxidizable (organic matter and sulfides, F3), and residual fraction (F4).…”

Section: Bcr Sequential Extractionmentioning

confidence: 99%

“…Additional studies documenting the bioaccessibility of HMs (Bio-HMs), defined as the fraction that is soluble in the gastrointestinal environment and potentially available for absorption, is the major part that may render health risks (Luo et al 2012b;Sauve et al 2000). On the basis of BCR sequential extraction (Rauret et al 1999;Van Herreweghe et al 2003), the forms of HMs are classified into exchangeable (water and acid-soluble, F1), easily reduced (iron/manganese oxyhydroxides, F2), oxidizable (organic matter and sulfides, F3), and residual fraction (F4). The occurrence and relative distribution of an element among these various phases, and the physical relation between the phases in the soils, will control an element's dissolution properties and, hence, its bioavailiability.…”

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confidence: 99%

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Factors influencing the heavy metal bioaccessibility in soils were site dependent from different geographical locations

Zhu

Yang

Wei

2015

Environ Sci Pollut Res

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A soil survey was conducted in urban areas from five sites, including Beijing, Baotou, Datong, Fuyang, and Xiantao in China. The objective was to explore the most significant factors that may impact the bioaccessibility of heavy metals (Bio-HMs), including As, Cr, Cu, Pb, and Zn, in soils. Twenty to 30 composite soil samples were collected at each site. The various soil properties, including pH, particle size, Fe/Mn, and organic matter contents, were analyzed. The chemical operated forms of HMs in soils were measured by the Bureau of Reference (BCR) sequential extraction scheme, while the Bio-HMs were determined by the simple bioaccessibility extraction test (SBET) procedure. The concentrations of total heavy metals (T-HMs) in soils from different sites (cities) were in the range as As (5.69-9.86), ) mg/kg. Cu and Pb had higher relative bioaccessibilities (48-70 %) than those of As and Cr (6-15 %), indicating higher health risks of the former than the latter two HMs. The Bio-HMs for various HMs were comparable to the first two or three combined BCR extracted fractions, with an exception of Cu, whose Bio-HMs were larger than the combined three BCR fractions, indicating that Cu was highly accessible in soils as compared with other HMs. Factor analysis showed that all variables, including soil property parameters and BCR extracted fractions, could be represented by three common factors extracted with higher than 0.5 loadings and ∼80 % cumulative contribution to the total variance. Among the three common factors, factor 1, containing mainly pH, texture, and Fe/Mn variables, and factor 3, containing mainly organic matter variable, could be attributed to geographical regions, while factor 2, containing mainly BCR extracted fractions, could be ascribed to relative bioaccessibility of HMs (R-Bio-HMs). Interactive mapping of the main factors and cluster analysis were consistent, which supported the Bsite gathering^of the soil sample pools, suggesting that the BioHMs in soils in different geographical localities were site dependent.

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“…Inorganic As species As(V) and As(III) are generally considered to be more toxic than organic species for many organisms [4]. Arsenite is more mobile and toxic than As(V) [17] because it is neutral under normal environmental conditions and therefore poor adsorption on soil particles [18]. Trimethylarsine (TMA) is volatilizable and thought to be nontoxic [19,20].…”

Section: Arsenic Species In Paddy Soilmentioning

confidence: 99%

Effects of microbial processes on the fate of arsenic in paddy soil

2012

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Arsenic (As) is a metalloid toxic to organisms including humans. Arsenic in rice represents a significant exposure pathway for the general population, particularly for those subsisting on rice. Arsenic transformation, namely reduction, oxidation and methylation, in soil-rice systems has fundamental impacts on its mobility and toxicity. In addition to soil chemical properties (pH, Eh, metallic oxides, organic matter), microorganisms play critical roles in As transformation and mobility in paddy soil, such as through ArsM (As(III) S-adenosylmethyltransferase) and interactions with iron oxides or organic matters. Arsenic species in paddy soil directly influence As speciation in rice grain because the methylated As species in rice are mainly derived from microbial methylation in paddy soil. This paper aims to provide an overview on the status of the knowledge and gaps on the chemical aspects of As transformation in soil-rice system in conjunction with microbial ecology and functional genes. In addition, potential pathways (manipulation of microorganisms in paddy soil and genetic engineering) to decrease total As and/or inorganic As in rice grain are proposed.

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Solid phase speciation of arsenic by sequential extraction in standard reference materials and industrially contaminated soil samples

Cited by 198 publications

References 54 publications

The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

The impacts of different long-term fertilization regimes on the bioavailability of arsenic in soil: integrating chemical approach with Escherichia coli arsRp::luc-based biosensor

Factors influencing the heavy metal bioaccessibility in soils were site dependent from different geographical locations

Effects of microbial processes on the fate of arsenic in paddy soil

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