Phosphate sorption and desorption by Thai upland soils

Wisawapipat, Worachart; Kheoruenromne, Irb; Suddhiprakarn, A.; Gilkes, Robert

doi:10.1016/j.geoderma.2009.09.005

Cited by 47 publications

(23 citation statements)

References 54 publications

(81 reference statements)

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“…Most sorbed P has been retained by the soil which reflects the irreversible sorption of phosphate by soil constituents due to a shift in the form of P held at the surface from a loosely bound to a more tightly bound type. Mechanisms proposed for this process have included precipitation of discrete phosphate minerals (Van Riemsdijk et al 1984;Dubus and Becquer 2001), a shift from monodentate to bidentate forms of sorbed P (Gimsing et al 2007;Wisawapipat et al 2009), and diffusive penetration of surface-sorbed P into soil components (Pierzynski 1991). There was no significant difference (r=−0.589, p=0.296) between P desorbed (initial P concentration of 100 mg l −1 ) and the duration of rice cultivation.…”

Section: Phosphorus Desorptionmentioning

confidence: 99%

Chronosequence of paddy soils and phosphorus sorption–desorption properties

Zou

Cao

2010

J Soils Sediments

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Purpose Accumulated soil phosphorus (P) in agricultural lands due to long-term organic manure and mineral phosphate fertilizer input is considered one of the main non-point pollution sources to surrounding surface water bodies. A chronosequence of soils is a potent instrument for pedological investigation and allows assessment of the effect of duration of agricultural cultivation on the environmental risk to water bodies of P loss from soil. Materials and methods The present study was conducted to evaluate the impact of pedogenesis on the retention of P in a chronosequence (25, 100, 300, 700, and 2,000 years) of rice paddy soils located on the south bank of Hangzhou Bay. Batch sorption-desorption experiments were performed on the samples of surface horizons from this chronosequence. Results and discussion P retention differed moderately among the studied soils ranging from 17.8% to 22.6% when 2,500 mg P kg −1 was added. Subsequent desorption experiment revealed that 11.2% to 21.9% of the recently sorbed P might move into solution. The maximum P sorption capacity as estimated by Langmuir isotherm ranged from 521.9 to 850.9 mg kg −1 , with a mean value of 726.2 mg kg −1 , while the degree of P saturation was less than 5%. The results indicate that P sorption is influenced by soil development with the maximum sorption capacity of studied soils significantly positively correlated to the organic carbon content of these soil materials.Conclusions The pH of the soil decreased from alkaline to neutral with increasing duration of rice cultivation due to continuing decalcification. The organic carbon content in the paddy surface soil materials increased with increasing duration of rice cultivation. The maximum P sorption capacity also slightly increased with increasing duration of rice cultivation likely due to organic carbon accumulation in topsoils. There is a very low risk of P in these paddy soils moving to the surrounding surface water bodies. This study of some possible long-term impacts helps to indicate that rice paddy agriculture is an environment friendly and sustainable land use.

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Section: Phosphorus Desorptionmentioning

confidence: 99%

Chronosequence of paddy soils and phosphorus sorption–desorption properties

Zou

Cao

2010

J Soils Sediments

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“…A mineralogia influencia a disponibilidade de nutrientes no solo e, em alguns casos, sobrepõe o efeito da textura, como observado por Moreira et al (2006), onde as maiores adsorções de P não ocorreram em solos com maior teor de argila e sim naqueles que apresentaram maior teor de Fe total e óxidos de Fe amorfo, o que interfere na disponibilidade desse nutriente para as plantas. Há trabalhos que também apresentaram a preponderância da mineralogia da fração argila na adsorção e disponibilidade de P no solo, como os de Farias et al (2009), Wisawapipat et al (2009) e Pinto et al (2013). Da mesma forma que a disponibilidade de ânions é dependente das cargas superficiais das argilas e, por sua vez da mineralogia, essa também influencia a CTC e a disponibilidade de nutrientes catiônicos no solo.…”

Section: Introductionunclassified

Disponibilidade E Recuperação De Nutrientes De Resíduos Culturais Em Solo Com Diferentes Texturas

Maluf

Soares

Silva

et al. 2015

Rev. Bras. Ciênc. Solo

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Resumoos resíduos de culturas agrícolas aportados sobre a superfície do solo, além da proteção física, podem liberar quantidades significativas de nutrientes ao solo pela decomposição deles; porém, a disponibilidade desses nutrientes às plantas é um fator pouco estudado. avaliaram-se os teores totais de c orgânico e n, o pH e a disponibilidade e taxa de recuperação dos macronutrientes provenientes da ciclagem biogeoquímica de diferentes resíduos culturais ao longo do tempo, em solos com texturas construídas. os tratamentos consistiram em fatorial 6 × 4 × 5, composto por seis tratamentos no primeiro fator, sendo quatro resíduos culturais: milho, braquiária, feijão, estilosantes, e dois controles, ambos sem resíduo e um com adição de fontes inorgânicas dos nutrientes; quatro diferentes texturas formadas a partir de um mesmo solo e cinco tempos de avaliação, após o início da incubação: 0, 25, 75, 125 e 175 dias; utilizou-se delineamento inteiramente casualizado, com quatro repetições. O tipo de resíduo, a textura do solo e o tempo de incubação influenciaram os teores totais de C orgânico e N, o pH, a disponibilidade e a taxa de recuperação de p, K, ca, mg e s. os teores totais de c orgânico e n nos solos diminuíram ao longo da incubação. Os resíduos de braquiária e estilosantes acidificaram o solo. O resíduo de braquiária apresentou-se como potencial fonte de K; e o de feijão, de S. O resíduo de milho apresentou as maiores taxas de recuperação de p em solos de textura média e argilosa. palavras-chave: ciclagem de nutrientes, fertilidade do solo, carbono orgânico, nitrogênio total, pH do solo.

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“…Fe/Al (oxy)hydroxides, especially the less crystalline forms, adsorb more As per unit mass than several clay minerals (Goldberg 2002). However, the Fe/Al (oxy)hydroxide contents in sediments are lower than the clay mineral contents (Wisawapipat et al 2009), so that the adsorption capacity of sediments must be mainly determined by the number of reactive surface groups that clay minerals expose. During the last few years, a relative large number of studies were performed investigating the arsenate adsorption onto clay minerals such as montmorillonite, kaolinite and illite (Manning and Goldberg 1996;Goldberg 2002).…”

Section: Introductionmentioning

confidence: 99%

Arsenate adsorption at the sediment–water interface: sorption experiments and modelling

2011

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Arsenate adsorption was studied in three clastic sediments, as a function of solution pH (4.0-9.0) and arsenate concentration. Using known mineral values, protolytic constants obtained from the literature and K ads values (obtained by fitting experimental adsorption data with empirical adsorption model), the constant capacitance surface complexation model was used to explain the adsorption behavior. The experimental and modelling approaches indicate that arsenate adsorption increases with increased pH, exhibiting a maximum adsorption value before decreasing at higher pH. Per unit mass, sample S 3 (smectitequartz/muscovite-illite sample) adsorbs more arsenate in the pH range 5-8.5, with 98% of sites occupied at pH 6. S 1 and S 2 have less adsorption capacity with maxima adsorption in the pH ranges of 6-8.5 and 4-6, respectively. The calculation of saturation indices by PHREEQC at different pH reveals that the solution was undersaturated with respect to aluminum arsenate (AlAsO 4 2H 2 O), scorodite (FeAsO 4 2H 2 O), brucite and silica, and supersaturated with respect to gibbsite, kaolinite, illite and montmorillonite (for S 3 sample). Increased arsenate concentration (in isotherm experiments) may not produce new solid phases, such as AlAsO 4 2H 2 O and/or FeAsO 4 2H 2 O.

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Phosphate sorption and desorption by Thai upland soils

Cited by 47 publications

References 54 publications

Chronosequence of paddy soils and phosphorus sorption–desorption properties

Chronosequence of paddy soils and phosphorus sorption–desorption properties

Disponibilidade E Recuperação De Nutrientes De Resíduos Culturais Em Solo Com Diferentes Texturas

Arsenate adsorption at the sediment–water interface: sorption experiments and modelling

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