Major and trace metal extraction from soil by EDTA: Equilibrium and kinetic studies

Manouchehri, Nastaran; Besançon, Stéphane; Bermond, Alain

doi:10.1016/j.aca.2005.11.050

Cited by 105 publications

(54 citation statements)

References 27 publications

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“…Although a number of studies have examined the kinetics of micronutrient fixation in soils (Manouchehri et al, 2006;Reyhanitabar and Gilkes, 2010;Abbas and Salem, 2011), the experimental conditions (e.g., sample size, reaction times) of these studies often limit the transferability of findings to field settings. This study was prompted by the limitations identified in the previous studies and the generally limited information on this subject area.…”

Section: T K Udeigwe Et Al: Examining the Fixation Kinetics Of Chementioning

confidence: 99%

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

et al. 2016

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Abstract. This study examined and compared the fixation and fixation kinetics of copper (Cu) in chelated (ethylene diamine tetraacetic acid, EDTA) and non-chelated mixed systems of micronutrients in the semiarid soils of the Southern High Plains, USA, using findings from Cu extraction studies and kinetic models. Approximately, 22 % more Cu was fixed in the non-chelated system compared to the chelated within the first 14 days with only 7 % difference between the two systems by day 90. Findings suggest a decrease in the effectiveness of chelated micronutrients over time, highlighting the significance of timing even when chelated micronutrients are used. The strengths of the relationship of change in available Cu with respect to other micronutrients (iron (Fe), manganese (Mn), and zinc (Zn)) were higher in the nonchelated system (R 2 : 0.68-0.94), compared to the chelated (R 2 : 0.42-0.81), with slopes of 0.40 (Cu-Fe), 0.31 (Cu-Mn), and 1.04 (Cu-Zn) in the non-chelated system and 0.26 (CuFe), 0.22 (Cu-Mn), and 0.90 (Cu-Zn) in the chelated system. Reduction in the amount of available Cu was best described by the power function model (R 2 = 0.91, SE = 0.081) in the non-chelated system and second-order model (R 2 = 0.95, SE = 0.010) in the chelated system. The applications generated from this study could be used as tools for improved micronutrient management and also provide baseline data for future work in other semiarid/arid alkaline soils of the world. Findings are also more applicable to field settings, an improvement over related previous studies.

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Section: T K Udeigwe Et Al: Examining the Fixation Kinetics Of Chementioning

confidence: 99%

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

et al. 2016

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show abstract

“…A major limitation to previous studies (Manouchehri et al, 2006;Reyhanitabar and Gilkes, 2010;Abbas and Salem, 2011) on micronutrient fixation was that the experimental conditions (e.g. sample size, reaction times, experimental duration) limit the application of findings to field settings.…”

Section: Introductionmentioning

confidence: 99%

Fixation kinetics of chelated and non-chelated zinc in semi-arid alkaline soils: application to zinc management

Udeigwe¹,

Eichmann²,

Menkiti³

2016

Solid Earth

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Abstract. This study was designed to examine the fixation pattern and kinetics of zinc (Zn) in chelated (ethylenediaminetetraacetic acid, EDTA) and non-chelated mixed micronutrient systems of semi-arid alkaline soils from the Southern High Plains, USA. Soils were characterized for a suite of chemical and physical properties and data obtained from extraction experiments fitted to various kinetic models. About 30 % more plant-available Zn was fixed in the non-chelated system within the first 14 days with only about 18 % difference observed between the two systems by day 90, suggesting that the effectiveness of the chelated compounds tended to decrease over time. The strengths of the relationships of change in available Zn with respect to other micronutrients (copper, iron, and manganese) were higher and more significant in the non-chelated system (average R 2 of 0.83), compared to the chelated (average R 2 of 0.42). Fixation of plant-available Zn was best described by the powerfunction model (R 2 = 0.94, SE = 0.076) in the non-chelated system, and was poorly described by all the models examined in the chelated system. Reaction rate constants and relationships generated from this study can serve as important tools for micronutrient management and for future micronutrient modeling studies on these soils and other semi-arid regions of the world.

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“…Metal speciation is one of the most important properties that determine the behavior and toxicity of metals in the environment. Chemical speciation of an element refers to its specific form characterized by a different isotopic composition, molecular structure, and electronic or oxidation state [25]. Speciation is the process of identification and determination of different chemical and physical forms of elements present in a sample [26].…”

Section: Fractionation and Bioavailability Of Copper In Soilsmentioning

confidence: 99%

Copper Accumulation in Vineyard Soils: Distribution, Fractionation and Bioavailability Assessment

Romić¹,

Matijević²,

Bakić³

et al. 2014

Environmental Risk Assessment of Soil Contamination

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Major and trace metal extraction from soil by EDTA: Equilibrium and kinetic studies

Cited by 105 publications

References 27 publications

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

Fixation kinetics of chelated and non-chelated zinc in semi-arid alkaline soils: application to zinc management

Copper Accumulation in Vineyard Soils: Distribution, Fractionation and Bioavailability Assessment

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