Factors influencing metal bioavailability in soils: preliminary investigations for the development of a critical loads approach for metals

Rieuwerts, John; Thornton, I.; Farago, M. E.; Ashmore, Mike

doi:10.3184/095422998782775835

Cited by 495 publications

(288 citation statements)

References 99 publications

(209 reference statements)

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“…More than 95% of the variability of Pb and Zn in the exchangeable fraction was explained by the variability of soil pH (Table 6). The association between metal adsorption on exchangeable surfaces of soil colloids and pH is partly due to the competition of H + for adsorption sites at low pH resulting in decreased metal adsorption (Rieuwerts et al 1998). Pb and Zn adsorption on exchangeable sites should therefore increase with increasing soil pH, but we obtained a negative correlation between soil pH and the proportion of exchangeable Pb and Zn (Table 6).…”

Section: Relationships Among Soil Properties Ptms Fractionation Biomentioning

confidence: 73%

“…As a result, adsorption reactions of Pb are significant at soil pH 3-5, and of Zn at pH 5-6.5. Precipitation and complexation reactions of both Pb and Zn predominate at soil pH 6-7 (Rieuwerts et al 1998). The content of soil organic matter varied from 1.5 to 12.5%.…”

Section: Resultsmentioning

confidence: 98%

“…The carboxylic groups of humus substances ionize as the pH rises and form more stable metal complexes. Pb generally tends to persist in the soil surface layers, although a significant quantity of Pb bound to the soluble part of the soil organic matter can be transported with percolates through the soil profile (Rieuwerts et al 1998). The texture of the soil samples also varied substantially.…”

Section: Resultsmentioning

confidence: 99%

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Relationship of soil properties to fractionation, bioavailability and mobility of lead and zinc in soil

Finzgar¹,

Tlustoš²,

Leštan³

2007

Plant Soil Environ.

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Sequential extractions, metal uptake by Taraxacum officinale, Ruby's physiologically based extraction test (PBET) and toxicity characteristic leaching procedure (TCLP), were used to assess the risk of Pb and Zn in contaminated soils, and to determine relationships among soil characteristics, heavy metals soil fractionation, bioavailability and leachability. Regression analysis using linear and 2 nd order polynomial models indicated relationships between Pb and Zn contamination and soil properties, although of small significance (P < 0.05). Statistically highly significant correlations (P < 0.001) were obtained using multiple regression analysis. A correlation between soil cation exchange capacity (CEC) and soil organic matter and clay content was expected. The proportion of Pb in the PBET intestinal phase correlated with total soil Pb and Pb bound to soil oxides and the organic matter fraction. The leachable Pb, extracted with TCLP, correlated with the Pb bound to carbonates and soil organic matter content (R 2 = 69%). No highly significant correlations (P < 0.001) for Zn with soil properties or Zn fractionation were obtained using multiple regression.

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Section: Relationships Among Soil Properties Ptms Fractionation Biomentioning

confidence: 73%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Relationship of soil properties to fractionation, bioavailability and mobility of lead and zinc in soil

Finzgar¹,

Tlustoš²,

Leštan³

2007

Plant Soil Environ.

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show abstract

“…Metal solubility was found to increase at lower while decrease at higher pH values (Ljung et al 2007;Rieuwerts et al 1998;Sauve et al 2000). The effect of pH in affecting the Bio-HMs was observed to be due to its influence on most of the chemical species of HMs in soils (Basta et al 1993).…”

mentioning

confidence: 91%

“…Therefore, many studies often used pH, soil texture, organic matter, and Fe/Mn oxides to predict the availability of HMs in soils (Rodrigues et al 2013). However, it is still not clear which of these parameters is robust enough to be allowed for an estimation of the bioaccessibility, since those developed predicting models varied in sites (Hund-Rinke and Kördel 2003;Rieuwerts et al 1998). Besides, the properties of the soils had been dramatically changed because of the increasing anthropogenic activities.…”

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confidence: 99%

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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Sources of Anthropogenic Contaminants in the Urban Environment

Albanese

Breward

2011

Mapping the Chemical Environment of Urban Areas

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Factors influencing metal bioavailability in soils: preliminary investigations for the development of a critical loads approach for metals

Cited by 495 publications

References 99 publications

Relationship of soil properties to fractionation, bioavailability and mobility of lead and zinc in soil

Relationship of soil properties to fractionation, bioavailability and mobility of lead and zinc in soil

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

Sources of Anthropogenic Contaminants in the Urban Environment

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