Kinetics of DTPA extraction of zinc from calcareous soils

Reyhanitabar, Adel; Gilkes, Robert

doi:10.1016/j.geoderma.2009.10.016

Cited by 52 publications

(37 citation statements)

References 22 publications

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“…Therefore, the best model to describe the Zn desorption of bulk and rhizosphere soils was the power function equation. Also, Reyhanitabar and Gilkes (2010) reported that the best model for describing release Zn using DTPA-TEA was the exponential rate equation. Dang et al (1994) tested different kinetics models to describe Zn desorption from Vertisols.…”

Section: Resultsmentioning

confidence: 99%

“…Indeed, for these dynamic systems, the metal availability may be believed to be controlled by kinetic factors (Errecalde et al, 1998;Ma et al, 1999;Slaveykova et al, 2003). Reyhanitabar and Gilkes (2010) studded the kinetics of Zn extraction by DTPA from 12 calcareous soils of Iran for 0.25 to 192 h. They reported that the best model for describing extraction data for all soils was the exponential rate equation. However, other equations have been proposed for describing release kinetics and they may provide better descriptions of Zn extraction from soil (Sparks 1986).…”

Section: Methodsmentioning

confidence: 99%

“…Reyhanitabar and Gilkes (2010) stated that the constant a in the power function may indicate the number of surface sites available for desorption of Zn. Also, the constant b is a measure of the affinity of Zn for these sites with increasing affinity of sites being indicated by the value of 1/b.…”

Section: Different Mathematical Modelsmentioning

confidence: 99%

“…Since DTPA and EDTA chelate Zn, and maintain low Zn ion concentrations in soil solution, thus to an extent simulating Zn adsorption by roots of growing plants, the rate of Zn desorption from soil by DTPA or EDTA should provide a measure of a rate factor of Zn availability (Dang et al,1994). This is especially important in calcareous soils, which generally contain quite large quantities of total Zn, but have only very small quantities of Zn in soil solution (Reyhanitabar and Gilkes, 2010), and thus the rate of because of their high content of organic matter and essential nutrients that favor crop growth (Renoux et al, 2007). Sewage sludge is an important source of nutrients such as Zn.…”

Section: Introductionmentioning

confidence: 99%

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Zinc desorption kinetics in wheat (Triticum Aestivum L.) rhizosphere in some sewage sludge amended soils

Motaghian

Hosseinpur

2013

J. Soil Sci. Plant Nutr.

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The objectives of this study were to determine Zn desorption characteristics and the correlation of these parameters with Zn extracted by DTPA-TEA method in bulk and rhizosphere amended soils with sewage sludge under greenhouse conditions by using a rhizobox. For amended soils 10 g of sewage sludge was added to 1 kg of 10 soil samples. The kinetics of Zn desorption in bulk and rhizosphere was determined by successive extraction with DTPA-TEA in a period of 1 to 504 h at 25±1 0 C. The results showed that Zn extracted using successive extraction in the rhizosphere were significantly (p<0.01) higher than in the bulk amended soils. The best model for describing extraction data for bulk and rhizosphere soils was the power function equation. The results indicated that Zn desorption rate in the wheat rhizosphere soils more than bulk soils. The results showed that significant correlation (p<0.05) between Zn desorption characteristics and DTPA-TEA-Zn were found in the bulk and rhizosphere soils. The results of this research revealed that Zn desorption characteristics that are help to estimate the Zn supplying power of soils in the wheat rhizosphere, are quite different than bulk amended with sewage sludge.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Different Mathematical Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Zinc desorption kinetics in wheat (Triticum Aestivum L.) rhizosphere in some sewage sludge amended soils

Motaghian

Hosseinpur

2013

J. Soil Sci. Plant Nutr.

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“…It was recognized that diethylenetriaminepentaacetic acid (DTPA) extraction provides a chemical evaluation of the amount of heavy metals that are available for plant uptake (Reyhanitabar and Gilkes 2009;Fuentes et al 2006). According to Lindsay and Norvell's method, the DTPA extractable heavy metals were determined to be the plant available heavy metals (Lindsay and Norvell 1978).…”

Section: Measurement Of Plant Available Heavy Metalsmentioning

confidence: 99%

Immobilization of Cd, Zn and Pb in sewage sludge using red mud

2011

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Sewage sludge is an inevitable end by-product of sewage treatment. Land application provides a costeffective alternative for sewage sludge disposal. However, sewage sludge contains heavy metals that may limit its application. In this work, red mud was employed for the immobilization of heavy metals in sewage sludge. The effect of red mud amendment on heavy metal immobilization was evaluated using Toxicity Characteristic Leaching Procedure (TCLP) method. The TCLP results showed that the immobilization efficiency of Cd, Zn and Pb was 100, 92, and 82%, respectively, when sewage sludge was mixed with 10% red mud. Tests carried out in leaching columns demonstrated that heavy metal concentrations in the leachate of 10% red mud amended sludge were lower than those of the unamended sludge. Moreover, red mud decreased plant available heavy metal (Cd, Zn and Pb) content from 18.1, 17.2 and 14.6% to 6.9, 11.4 and 7.6%, respectively. Sequential chemical extraction experiments showed that after sludge was amended with 10% red mud, exchangeable fraction was reduced and iron and manganese oxides fraction was increased. Red mud amendment can effectively immobilize Cd, Zn and Pb in sewage sludge before land application.

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Improving the relationship between soil characteristics and metal bioavailability by using reactive fractions of soil parameters in calcareous soils

Santiago-Martín

Oort²,

González

et al. 2014

Environmental Toxicology and Chemistry

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The contribution of the nature instead of the total content of soil parameters relevant to metal bioavailability in lettuce was tested using a series of low-polluted Mediterranean agricultural calcareous soils offering natural gradients in the content and composition of carbonate, organic, and oxide fractions. Two datasets were compared by canonical ordination based on redundancy analysis: total concentrations (TC dataset) of main soil parameters (constituents, phases, or elements) involved in metal retention and bioavailability; and chemically defined reactive fractions of these parameters (RF dataset). The metal bioavailability patterns were satisfactorily explained only when the RF dataset was used, and the results showed that the proportion of crystalline Fe oxides, dissolved organic C, diethylene-triamine-pentaacetic acid (DTPA)-extractable Cu and Zn, and a labile organic pool accounted for 76% of the variance. In addition, 2 multipollution scenarios by metal spiking were tested that showed better relationships with the RF dataset than with the TC dataset (up to 17% more) and new reactive fractions involved. For Mediterranean calcareous soils, the use of reactive pools of soil parameters rather than their total contents improved the relationships between soil constituents and metal bioavailability. Such pool determinations should be systematically included in studies dealing with bioavailability or risk assessment.

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Kinetics of DTPA extraction of zinc from calcareous soils

Cited by 52 publications

References 22 publications

Zinc desorption kinetics in wheat (Triticum Aestivum L.) rhizosphere in some sewage sludge amended soils

Zinc desorption kinetics in wheat (Triticum Aestivum L.) rhizosphere in some sewage sludge amended soils

Immobilization of Cd, Zn and Pb in sewage sludge using red mud

Improving the relationship between soil characteristics and metal bioavailability by using reactive fractions of soil parameters in calcareous soils

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