Comparison of EDTA and sequential extraction tests for phytoavailability prediction of manganese and zinc in agricultural alkaline soils

Álvarez, Jose M.; López-Valdivia, L. M.; Novillo, J.; Obrador, Ana; Beltrán, M.

doi:10.1016/j.geoderma.2005.06.009

Cited by 117 publications

(80 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In organo-mineral soils, with acid reaction, zinc occurs in exchangeable and mobile forms sometimes exceeding 60% of total [25]. The results published by other authors suggest that a similar share of the soil components in the binding of this metal were found in soils with similar physicochemical properties [4,27].…”

Section: Resultsmentioning

confidence: 84%

Fractionation of Selected Heavy Metals in Agricultural Soils / Frakcjonowanie Wybranych Metali Ciężkich W Glebach Uprawnych

Różański¹

2013

Ecological Chemistry and Engineering S

View full text Add to dashboard Cite

Abstract:The content of trace elements in soils varies widely and their mobility and availability depends not only on the total content but also on the form of in which these elements occur. The aim of this study was to determine the total content of nickel, lead, zinc and copper in soils used for agriculture, and assess the mobility and phytoavailability of these metals against a background of physical and chemical properties of these soils. In samples taken from three soil profiles (Phaeozem and 2 Fluvisols) the contents of Ni, Pb, Zn and Cu were determined using atomic absorption spectroscopy in the solutions obtained according to the protocol of modified BCR sequential extraction procedure supplemented with aqua regia digestion. The total content of the analyzed metals in most cases corresponded to the natural values, often not exceeding the geochemical background level. It was only in the one profile of the Fluvisols (Endogleyic Fluvisol) that a higher concentration of zinc and lead was noticed (especially in the surface horizon), slightly exceeding the legal limit. Among the studied metals the lowest phytoavailability was characterized by copper (exchangeable forms on average 4.73% of the total), and the highest by zinc (11.49%). Nickel was the most permanently bound with soil solid phase, and its content in the residual fraction reached 84.46% of the total. Approximately a half of the total lead content was determined as a fraction bound with iron and manganese oxides, while in the case of this metal a significant role in binding of this metal was playing organic matter (fraction bound with organic matter and sulphides -an average of 27.5%). Significant role in the binding of all investigated metals was credited to iron and manganese compounds.

show abstract

Section: Resultsmentioning

confidence: 84%

Fractionation of Selected Heavy Metals in Agricultural Soils / Frakcjonowanie Wybranych Metali Ciężkich W Glebach Uprawnych

Różański¹

2013

Ecological Chemistry and Engineering S

View full text Add to dashboard Cite

show abstract

“…The speciation of metal plays a fundamental role in the way in which transfers between different soil compartments take place and soil minerals migrate towards plants (Chandi and Takkar 1982;Mench and Martin 1991). However, the mechanism by which chemical reagents are selected has remained a question for debate and so, despite certain limitations, sequential extraction is still generally considered the best way to evaluate the different forms and associations of metals present in soil (Alvarez et al 2006;Ure 1995). Another approach for estimating the availability of metals to plants using single extractions such as DTPAammonium bicarbonate (DTPA-AB) and Mehlich-3 methods, which tend to correlate well with metal concentrations in plants (Adriano 2001;Jones 2001).…”

Section: Introductionmentioning

confidence: 99%

Influence of soil type and natural Zn chelates on flax response, tensile properties and soil Zn availability

Álvarez

2009

Plant Soil

View full text Add to dashboard Cite

“…After the aging process, almost all exogenous Cd will be retained in soil, and α tends to 0, then Equation (8) can be expressed as…”

Section: Processes Of Mesopore/micropore Diffusionmentioning

confidence: 99%

“…In view of the effectiveness in removing a wide range of heavy metals, chelating or acidic agents are widely applied as extractants [7]. As a well-known strong chelating agent, ethylenediaminetetraacetic acid (EDTA) has been widely applied to estimate the total extractability of metals [8,9], and reported to extract metals that are associated with oxides and secondary clay minerals and organically bound [10]. Metals extracted by EDTA are considered to be good indicators for the maximum potential metal extractability, helpful for the prediction of long-term risks [6] and useful for modeling the dynamics of metal ions and predicting their availability to plants and animals.…”

Section: Introductionmentioning

confidence: 99%

Change of the Extractability of Cadmium Added to Different Soils: Aging Effect and Modeling

et al. 2018

View full text Add to dashboard Cite

Ethylenediaminetetraacetic acid (EDTA) is known to be a chelating agent and has been widely used for estimating the total extractable metals in soil. The effect of aging on EDTA-extractable cadmium (Cd) was investigated in five different soils at three Cd concentrations incubated for 180 days. The EDTA-extractable Cd rapidly decreased after incubated during 30-60 days, followed by slow processes, and for 90 days the EDTA-extractable Cd tended to be stable. The decrease in EDTA-extractable Cd may be due to precipitation/nucleation processes, diffusion of Cd into the micropores/mesopores, and occlusion within organic matter in soils. A semi-mechanistic model to predict the extractability of Cd during incubation, based on processes of Cd precipitation/nucleation, diffusion, and occlusion within organic matter, was developed and calibrated. The results showed that the processes of micropore/mesopore diffusion were predominant processes affecting the extractability of Cd added to soils, and were slow. However, the proportions of the processes of precipitation/nucleation and occlusion within organic matter to the non-EDTA-extractable Cd added to soils were only 0.03-21.0% and 0.41-6.95%, respectively. The measured EDTA-extractable Cd from incubated soils were in good agreement with those predicted by the semi-mechanistic model (R 2 = 0.829). The results also indicated that soil pH, organic matter, and incubation time were the most important factors affecting Cd aging.

show abstract

Comparison of EDTA and sequential extraction tests for phytoavailability prediction of manganese and zinc in agricultural alkaline soils

Cited by 117 publications

References 48 publications

Fractionation of Selected Heavy Metals in Agricultural Soils / Frakcjonowanie Wybranych Metali Ciężkich W Glebach Uprawnych

Fractionation of Selected Heavy Metals in Agricultural Soils / Frakcjonowanie Wybranych Metali Ciężkich W Glebach Uprawnych

Influence of soil type and natural Zn chelates on flax response, tensile properties and soil Zn availability

Change of the Extractability of Cadmium Added to Different Soils: Aging Effect and Modeling

Contact Info

Product

Resources

About