Kinetics of Competitive Fixation of Potassium and Ammonium Ions by Silt Component of Soils from Different Agro-Climatic Regions

Abasiyan, Sara Mola Ali; Hassan, Towfighi

doi:10.1080/00103624.2018.1432635

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…The reaction path gains a slight slope until these curves become almost parallel to the x-axis, indicating that the reaction system has reached a state of semi-equilibrium, but it does not reach the state of constant adsorption, which requires conducting subsequent studies by adopting more flowing pore sizes. According to the law of proportions (Abasiyan and Towfighi, 2018) This leads to occupying most of the adsorption sites in the soil and decreasing their numbers, and after that, any increase in the added ion does not represent anything but pressure on the diffusion of part of the ionic type present in the solution, which constitutes a (compressive driving force) on the electric double layer. First Order S4…”

Section: Resultsmentioning

confidence: 99%

Using the kinetic approach for the adsorption of base ions (Ca, Mg, Na, K) by the calm flow method in some soils in the northern of Iraq

Qadir,

Al-Obaidi

2024

TJAS

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Abstract. Four soils were selected from northern Iraq, within the ranks (Mollisols, Inceptisols) from the provinces of Dohuk, Erbil and Sulaymaniyah from different agricultural fields from the root zone (0-0.30 m). Their physicochemical and mineral properties were estimated to study thermally isotropic adsorption by the calm flow method of soil columns using an electrolytic solution. At concentrations of (3) mmol charge.L-1, containing Ca, Mg, K, and Na ions in two repetitions at a constant temperature of approximately 298 ± 2 K. Stabilization filters were collected in which the ions were estimated according to the coefficients. The results indicated that the reactions ranged from medium alkaline to medium acidic. (6.7- (7.8), unaffected by salinity (1.44 - 0.29) dS.m-1 with an ion exchange capacity between (22.43 - (33.9 Cmolc.Kg-1) and is calcareous soil due to its high content of total carbonate minerals (-112) g.kg-1 .In addition to the calcareous origin material, and it has a high clay content (304-534) g.kg-1 with the predominance of smectite, chlorite, Ilite, kaolinite and Ilite clay minerals, the nature of ion exchange using the kinetic entrance of adsorption showed a clear effect of the porous fats and the contact time of the electrolyte solution on the adsorbed quantities depending on the type of soil. Show the mathematical description of the process of arranging the kinetic equations according to their validity as follows: Power > First order > Parabolic > Elovage > Zero order

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Section: Resultsmentioning

confidence: 99%

Using the kinetic approach for the adsorption of base ions (Ca, Mg, Na, K) by the calm flow method in some soils in the northern of Iraq

Qadir,

Al-Obaidi

2024

TJAS

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Black oat (

Vicensi

Umburanas

Rampim

et al. 2021

Crop & Pasture Science

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ContextThe effect of long-term gypsum on nitrogen (N) responsiveness in black oat (Avena strigosa Schreb.) forage lacks information.Aims and methodsThis study evaluated interactions between different rates of N (0, 50 and 100kgNha−1) and gypsum (0, 3, 6, 9 and 12Mgha−1) on the yield, nutrition and bromatology of forage black oats in a long-term experiment using a no-till system (NTS) in a Ferralsol in southern Brazil.Key resultsThere was an interaction between residual gypsum and N rate on biomass forage yield in 2015, but not for the 2016 growing season. In 2015, the rate of 100kgNha−1 increased yield by 10% in the absence of gypsum and by 30% at low-medium rates of residual-gypsum (3 and 6Mgha−1), but there was no response to high N rate under high gypsum rates (9 and 12Mgha−1). In 2016, a poor-growing season, a gypsum rate of 6Mgha−1 and N rate of 100kgha−1 independently improved forage yield by 5%. Gypsum application produced higher forage contents of N, P, K, Ca and S, and decreased Mg content. N-fertilisation increased the N, K, Ca, and Mg contents, but decreased P content and S concentration. Gypsum had no effect on forage bromatological quality, and even with equivalent forage yield between 50 and 100kgNha−1, only the high N rate improved some of the forage quality attributes in both years.Conclusions and implicationsNeither gypsum nor topdressing of N altered N use by black oat forage.

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A talaj fixált ammónium-ion tartalmának hatása a talajvíz tisztulási folyamataira a szennyezőforrás felszámolását követően települési környezetben

Mester

Cavalli

Balla

et al. 2020

Agrokem

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Growing NH4+ content of groundwater results in increasing exchangeable and fixed ammonium ion content of the soil. NH4+ bond in the soil may go again into solution parallel with the dilution of the soil solution but at a slower rate than fixing. This process influences significantly the NH4+ content of the soil. In settlements with no sewerage system the high NH4+ content of sewage flowing out of uninsulated septic tanks may increase the fixed NH4-N content of the soil that could have a significant effect on the quality of groundwater even after the potential disappearance of pollution sources.In this study the effects of the fixed NH4-N content of the soil around an uninsulated residential septic tank on the purification processes of the groundwater were investigated. The septic tank in the study area was dismantled in 2014 after 27 years of operation as a sewerage system was constructed. When the tank was still in operation in 2012 and 2013, very high, 55–75 mg l-1 NH4+ content was measured in the water of the monitoring well 1 metre from the tank in the course of seasonal sampling. When sewage outflow was terminated in 2014 concentrations decreased right away but even 5 years after pollutant supply was stopped, concentrations (35–57 mg l-1) highly exceeding the pollution limit (0.5 mg l-1) were measured. Considering this very high concentration, it can be assumed that great amount of NH4+ is still released into the groundwater.In order to prove this, the exchangeable and fixed NH4-N and NO3-N contents of the soil were determined by 20 cm down to a depth of 4 metres (2019). The measurements indicated the significant accumulation of exchangeable and fixed NH4-N in the zone between 220 and 400 cm. Highest fixed NH4-N concentrations of 457 mg l-1 were found between 220 and 240 cm suggesting that sewage outflow was most intense at this depth. Slow decrease in concentrations can be observed in deeper zones but concentrations higher than 350 mg l-1 were measured between 220 and 380 cm. Based on correlation analyses, the quantity of fixed NH4-N shows no correlation with the soil texture thus it can be stated that the vertical pattern of NH4-N content is determined dominantly by sewage outflow and its depth. In the unsaturated zone of the borehole a significant accumulation of NO3-N was also identified. The maximum of NO3-N was found in the zone between 100 and 140 cm. The peak nitrate calculated for NO3- ion with a value >1300 mg kg-1 is 2.5 times the limit set for the nitrate content of the geological medium.Based on the results, exchangeable and fixed NH4-N contents in the soil are still very high, 5 years after sewage outflow was stopped. The continuous solution of this component still contributes to the high NH4+ content of the groundwater. As a result, the contaminated soil in the immediate environment of the septic tank is still a pollution source.

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Kinetics of Competitive Fixation of Potassium and Ammonium Ions by Silt Component of Soils from Different Agro-Climatic Regions

Cited by 4 publications

References 36 publications

Using the kinetic approach for the adsorption of base ions (Ca, Mg, Na, K) by the calm flow method in some soils in the northern of Iraq

Using the kinetic approach for the adsorption of base ions (Ca, Mg, Na, K) by the calm flow method in some soils in the northern of Iraq

Black oat (

A talaj fixált ammónium-ion tartalmának hatása a talajvíz tisztulási folyamataira a szennyezőforrás felszámolását követően települési környezetben

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