The kinetics of potassium release to sodium tetraphenylboron solution from the clay fraction of highly weathered soils

Darunsontaya, Timtong; Suddhiprakarn, A.; Kheoruenromne, Irb; Gilkes, Robert

doi:10.1016/j.clay.2010.09.001

Cited by 23 publications

(22 citation statements)

References 33 publications

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“…Evidently, the use of NaTPB solution to extract K did not cause irreversible collapse of micas. These results are consistent with those reported by Darunsontaya et al (2010) and Singh and Goulding (1997), who observed that Kdepletion resulted in a decrease in the intensity of reflections for illite and an increase for interstratified clay minerals, vermiculite and smectite. However, a small amount of the framework element Si was also released from micas in NaTPB solution.…”

Section: Discussionsupporting

confidence: 93%

“…Previous studies have shown that release of NEK from micas via the chemical extraction method proceed by exchanging the adjacent interlayer K + with hydrated cations and the dissolution of micas, resulting in the formation of weathering products (Andrist-Rangel et al, 2013;Darunsontaya et al, 2010;Jalali, 2005;Mortland and Ellis, 1959;Reed and Scott, 1962;Srinivasa Rao et al, 2006). However, there is still a great deal of uncertainty and variation among these batch experiments with respect to the respective contribution of the exchange and dissolution to release budgets, which has important implications for predicting plant/mineral interactions and soil sustainability.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, previous studies have obtained a full NEK release characterization from 2:1 K-bearing minerals, and minerals extracted by the chemical method of interlayer anhydrous K + ions expanded the basal spacing of these layers, which led to significant changes in XRD patterns (Andrist-Rangel et al, 2013;Cox and Joern, 1997;Darunsontaya et al, 2010). However, there have been few nano-scale studies of the crystallo-chemical changes of 2:1 K-bearing minerals caused by the traditional NEK extraction chemical method.…”

Section: Introductionmentioning

confidence: 99%

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A nano-scale study of the mechanisms of non-exchangeable potassium release from micas

Wang

Zhou

et al. 2015

Applied Clay Science

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A nano-scale study of the mechanisms of non-exchangeable potassium release from micas

Wang

Zhou

et al. 2015

Applied Clay Science

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“…Vários autores têm usado essa técnica de natureza física para verificar a evolução da mineralogia das frações areia, silte e argila com as extrações no longo do tempo nos estudos de cinética de liberação de K (Mengel, 2000;Melo et al, 2005;Darunsontaya et al, 2010).…”

Section: Resumo a Integração De Métodos Químicos De Extração E A Difrunclassified

“…Melo et al (2005) Comparando os padrões de DRX da fração argila antes e depois da cinética com ácido oxálico, tem-se uma redução em todas as amostras na intensidade da reflexão basal (001) da esmectita + ilita (tratamento com K + e aquecimento a 550 o C) (Figura 1). Darunsontaya et al (2010) mostraram a grande importância da ilita na liberação de formas de reserva de K + em estudo de cinética com solução tetrafenil borato de sódio (NaTPB), com decréscimo na intensidade das reflexões do mineral por DRX. Verificou-se também redução da largura à meia altura (LMH) da reflexão (001) da esmectita no tratamento com Mg 2+ a 25 o C no horizonte A do PBAC1 (LMH antes do AO = 3,00 º2θ e LMH depois do AO = 2,14 º2θ) e no horizonte Bt do PBAC2 (LMH antes do AO = 3,15 º2θ e LMH depois do AO = 2,69 º2θ), com o tratamento com ácido oxálico (Figura 1).…”

Section: Cinética De Liberação De K + Das Frações Areia Silte E Argilaunclassified

Reserva Mineral De K Por Diferentes Métodos Em Argissolos Subtropicais

Chaves

Pedron

Melo

et al. 2015

Rev. Bras. Ciênc. Solo

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A integração de métodos químicos de extração e a difração de raios-X podem ampliar o entendimento das formas de reserva de K+ nas frações do solo e o seu potencial de liberação para as plantas. Os objetivos deste estudo foram empregar os métodos de extração química para estimar a reserva mineral de K+ das frações areia, silte e argila de solos subtropicais, associar os mecanismos de extração com as formas liberadas do nutriente e acompanhar a dinâmica dessa liberação em estudo de cinética. As frações areia, silte e argila dos horizontes A e Bt de três Argissolos subtropicais foram submetidas à extração de formas não trocáveis e estruturais de K+pelos métodos: ácido oxálico 0,01 mol L-1 (cinética de liberação até o tempo acumulado de 2.889 h); HNO3 1 mol L-1 fervente; NaHSO4 na forma de cristais; e HNO3/HF/H2SO4 concentrados (teores totais). A fração argila também foi submetida a tratamento com NaOH 5 mol L-1. As esmectitas dioctaedrais na fração argila foram consideradas importantes na dinâmica de liberação de formas de reserva de K+. A maior e menor liberação de formas não trocáveis e estruturais de K+ foram pela extração com NaHSO4 e pelo ataque ácido com HNO3, respectivamente. Com os dados da cinética de liberação de K+ é possível concluir que as plantas cultivadas, nos Argissolos estudados, no longo dos anos nos solos estariam bem nutridas a partir de formas não trocáveis e estruturais de K+.

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Evaluation of soil potassium‐holding capacity based on waterlogging‐simulation experiments

Zhao

Gao

et al. 2021

Agronomy Journal

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Evaluating the capacity and loss risk of soil nutrients is helpful to make fertilization strategies. Herein, the term of soil potassium (K)-holding capacity (SKHC) was put forward to assess the capacity and loss risk of plant-available K of specific soils. In this study, SKHC was evaluated via soil waterlogging-simulation experiments using 14 different soils. The K concentrations in surface water were measured, and a critical K concentration was selected to indicate high soil K loss. Results showed that the surface water K concentration (K sw ) was significantly affected by waterlogging time, temperature, and soil thickness. The average K sw of 5-cm soil columns waterlogged for 24 h for the 14 soils was 5 mg L -1 (1.57-8.57 mg L -1 ); this was subsequently used as the critical K concentration. By repeating the waterlogging simulation experiment with soils treated with different rates of K fertilizer, a quadratic relationship between the K rate and K sw was found and used to determine the K rate required making the K sw reach the critical K concentration. For the 14 soils, SKHC ranged from 133 to 2,054 mg kg -1 and can be classified into four levels: low, <500 mg kg -1 ; moderate, 500-1,000 mg kg -1 ; high, 1,000-1,500 mg kg --1 ; and extremely high, >1,500 mg kg -1 . These results allowed the preliminary establishment of an SKHC evaluation method and grading system. Future studies should verify the SKHC under field conditions and optimize the assessment method proposed in this study. INTRODUCTIONPotassium (K) is the most abundant cation within plants. Although K is not required for tissue formation (Pettigrew, Abbreviations: K critical , critical potassium concentration; K initial , plant-available potassium of initial soil; K sw , potassium concentrations in surface water; K sw-5-24 , potassium concentration in surface water at the waterlogging time of 24 h; NaTPB, sodium tetraphenylborate; NH 4 OAc, ammonium acetate; SKHC, soil potassium-holding capacity.

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The kinetics of potassium release to sodium tetraphenylboron solution from the clay fraction of highly weathered soils

Cited by 23 publications

References 33 publications

A nano-scale study of the mechanisms of non-exchangeable potassium release from micas

A nano-scale study of the mechanisms of non-exchangeable potassium release from micas

Reserva Mineral De K Por Diferentes Métodos Em Argissolos Subtropicais

Evaluation of soil potassium‐holding capacity based on waterlogging‐simulation experiments

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