Kinetics of DTPA extraction of Copper from Calcareous Soils of East Azerbaijani Province

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REYHANITABAR A.; Abdolmaleki E.; NAJAFI N.; OUSTAN SH.

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Journal: WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE) Year:2019 | Volume:29 | Issue:3 Page(s): 181-193

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Title

Kinetics of DTPA extraction of Copper from Calcareous Soils of East Azerbaijani Province

Author(s)

REYHANITABAR A. | Abdolmaleki E. | NAJAFI N. | OUSTAN SH. | Issue Writer Certificate

Keywords

Calcareous soilsQ2

CopperQ1

DesorptionQ1

East AzerbaijanQ3

Kinetics equationsQ1

Abstract

Cupper (Cu) is one of the micronutrients and the release rate of this element is an important factor in determining its bioavailability in Calcareous soils. In this research, the kinetics of native Cu extraction by DTPA was studied in 21 calcareous surface soils (0-30 cm) and the best kinetics model to describe the data was selected. For this purpose 20 mL of 0. 005 M DTPA solution was added to 10 g air dried soil and shacked, then during the 0. 16 to 200 hours the concentration of Cu was determined. Furthermore the abilities of zero, first, second and third order equations, simple Elovich, two constant rate, parabolic diffusion, Lagergern first order and Blanchard equations in description of the kinetics process were evaluated. According to the results, the rate of Cu extraction by DTPA was increased with time then reached a relative equilibrium in 72 hours. The best models for describing kinetics of Cu extraction during 200 hours were the simple Elovich and two constant rates. Also within 0. 16 to 20 hours besides these two equations, the parabolic diffusion was one of the best models, too. Lagergern first order and Blunchard equation despite the wide range of correlation coefficients did not have a good fitness with the 21 studied soils. The α sβ st product of simple Elovich equation (qt = 1/β s ln(α sβ s) + 1/β s lnt( in initial 15 minutes was larger than 1 for all studied soils. The amounts of constant b in the constant rate equation (qt = atb) were positively and negatively correlated with sand concentration (r= 0. 47 *) and CEC values (r=-0. 45*), respectively. The highest correlation coefficients between the kinetics parameters of superior equation, was observed between the ab with β s.

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APA: Copy

REYHANITABAR, A., Abdolmaleki, E., NAJAFI, N., & OUSTAN, SH.. (2019). Kinetics of DTPA extraction of Copper from Calcareous Soils of East Azerbaijani Province. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), 29(3 ), 181-193. SID. https://sid.ir/paper/397250/en

Vancouver: Copy

REYHANITABAR A., Abdolmaleki E., NAJAFI N., OUSTAN SH.. Kinetics of DTPA extraction of Copper from Calcareous Soils of East Azerbaijani Province. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE)[Internet]. 2019;29(3 ):181-193. Available from: https://sid.ir/paper/397250/en

IEEE: Copy

A. REYHANITABAR, E. Abdolmaleki, N. NAJAFI, and SH. OUSTAN, “Kinetics of DTPA extraction of Copper from Calcareous Soils of East Azerbaijani Province,” WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), vol. 29, no. 3 , pp. 181–193, 2019, [Online]. Available: https://sid.ir/paper/397250/en

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