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Potassium adsorption in calcareous soils of Kurdistan Region of Iraq
Other Title(s)
امتزاز البوتاسيوم في بعض الترب الكلسية لإقليم كوردستان العراق
Author
Source
The Iraqi Journal of Agricultural Science
Issue
Vol. 51, Issue (s) (31 Jan. 2020), pp.42-52, 11 p.
Publisher
University of Baghdad College of Agriculture
Publication Date
2020-01-31
Country of Publication
Iraq
No. of Pages
11
Main Subjects
Topics
Abstract EN
Sorption is one of the most chemical important processes, which determine nutrients availability in soil.
Sorption isotherms provide sufficient information about soils sorption’s capacity, and it’s data can be used to determine thermodynamic sorption parameters.
The aim of this studyis to evaluate the sorption of potassium onto some soils.
An experiment was conducted with four calcareous soils of the Sulaimani province Kurdistan Region of Iraq by using the batch methods.
5g soil samples were equilibrated at 298±1 Kelvin with 50 ml of 0.01M CaCl2 containing 0 to 250 mg L-1 K as KCl.
Suspensions were centrifuged, filtered, and concentration of K+ in the clear extract solution was determined.
Amount of K+ sorbed by the soil was calculated from the difference between the initial and final concentration of K+ in the equilibrium solution.
Sorption of K+ was evaluated using adsorption isotherms.
The results showed that K+ sorption was described by linear, Langmuir, Freundlich, and Temkin equations.
Langmuir equation gave a better fit of equilibrium K adsorption when it has a higher R2 and lowers SE.
The data indicated that the maximum monolayer coverage capacity (b) from the Langmuir isotherm model ranged between (-113.63 to 2500) mg kg-1.
The negative values of (b) for studied locations soils indicated to potassium release instead of adsorption.
The Langmuir isotherm constant (KL) ranged from (-0.01 to 0.01) L mg-1.
Maximum buffering capacity (MBC) is a capacity factor, which measures the ability of the soil to replenish K ion to soil solution that the ability of a soil to supply K to the soil solution.
The value of MBC of the studied soils ranged from 0.453 to 23.75 mg kg-1.The sorption processes for the forth locations are favorable and spontaneous because the value of RL was an equal one.
American Psychological Association (APA)
Rasul, Ghafur Ahmad Mam. 2020. Potassium adsorption in calcareous soils of Kurdistan Region of Iraq. The Iraqi Journal of Agricultural Science،Vol. 51, no. (s), pp.42-52.
https://search.emarefa.net/detail/BIM-948704
Modern Language Association (MLA)
Rasul, Ghafur Ahmad Mam. Potassium adsorption in calcareous soils of Kurdistan Region of Iraq. The Iraqi Journal of Agricultural Science Vol. 51, Special Issue (2020), pp.42-52.
https://search.emarefa.net/detail/BIM-948704
American Medical Association (AMA)
Rasul, Ghafur Ahmad Mam. Potassium adsorption in calcareous soils of Kurdistan Region of Iraq. The Iraqi Journal of Agricultural Science. 2020. Vol. 51, no. (s), pp.42-52.
https://search.emarefa.net/detail/BIM-948704
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 50-52
Record ID
BIM-948704