Adsorption of Fluoride by Soils and Minerals

Bower, C. A.; Hatcher, J. T.

doi:10.1097/00010694-196703000-00001

Cited by 137 publications

(59 citation statements)

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“…The untreated soils also exhibited the two site Langmuir model. The Langmuir values shown in Table 1 for the deeper depths after leaching were quite similar to those obtained by Bower and Hatcher (1967) for their calcareous soils that had not been acid washed.…”

Section: Resultssupporting

confidence: 75%

Fluoride adsorption by a saline sodic soil irrigated with a high F water

Robbins¹

1986

Irrig Sci

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Section: Resultssupporting

confidence: 75%

Fluoride adsorption by a saline sodic soil irrigated with a high F water

Robbins¹

1986

Irrig Sci

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“…The positive ∆pH values of soils 1, 4 and 5 agree with their acric characteristics (Embrapa, 1999). The pH NaF values ranged from 8.8 to 10.7 suggesting the displacement of OH -by F -ions from mineral surfaces (Bower & Hatcher, 1967). The remaining phosphorus values showed great amplitude, ranging from 0.1 µg mL -1 for the Xanthic Acrudox (5) to 43 µg mL -1 for the Typic Quartzipsamment (14) evidencing expressive PBC variation among the soils.…”

Section: Resultsmentioning

confidence: 99%

Remaining phosphorus and sodium fluoride pH in soils with different clay contents and clay mineralogies

Alves¹,

Lavorenti

Agricultura³

et al. 2004

Pesq. agropec. bras.

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-The remaining phosphorus (Prem) has been used for estimating the phosphorus buffer capacity (PBC) of soils of some Brazilian regions. Furthermore, the remaining phosphorus can also be used for estimating P, S and Zn soil critical levels determined with PBC-sensible extractants and for defining P and S levels to be used not only in P and S adsorption studies but also for the establishment of P and S response curves. The objective of this work was to evaluate the effects of soil clay content and clay mineralogy on Prem and its relationship with pH values measured in saturated NaF solution (pH NaF). Ammonium-oxalate-extractable aluminum exerts the major impacts on both Prem and pH NaF, which, in turn, are less dependent on soil clay content. Although Prem and pH NaF have consistent correlation, the former has a soil-PBC discriminatory capacity much greater than pH NaF.Index terms: ammonium-oxalate-extractable Al, phosphate adsorption, phosphorus buffer capacity. Fósforo remanescente e pH em fluoreto de sódio em solos com diferentes teores e qualidades de argilaResumo -O fósforo remanescente (Prem) tem sido utilizado para estimar o fator capacidade de P (FCP) de solos de algumas regiões do Brasil. Entre outras finalidades, o P remanescente pode também ser utilizado para estimar níveis críticos de P, S e Zn no solo, determinados com extratores sensíveis ao FCP, e para a definição das doses de P e S a serem usadas, tanto em estudos de adsorção como no estabelecimento de curvas de resposta a esses elementos. O objetivo deste trabalho foi avaliar os efeitos do teor e da composição mineralógica da fração argila do solo sobre o Prem, e sua relação com o pH medido em solução saturada de NaF (pH NaF). Tanto o Prem quanto o pH NaF são mais influenciados pelo teor de Al extraído com oxalato de amônio e menos dependentes do teor de argila. Embora a correlação entre o Prem e o pH NaF seja consistente, o Prem apresenta maior capacidade de estratificar solos quanto ao fator capacidade de fósforo que o pH NaF Termos de indexação: alumínio extraível com oxalato, adsorção de fosfato, fator capacidade de fósforo.

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“…In some places, the high fluoride concentrations of ground water may result from this effect. Studies relating to fluoride sorption on soils were made by Bower and Hatcher (1967 water with a pH of 9.2 and with a content of 22 mg/1 of fluoride; however, not all fluoride-bearing water has a high pH.…”

Section: Range Of Concentrationmentioning

confidence: 99%

“…These hydroxide ions could perhaps be replaced by fluoride ions because these have the same charge and approximate shape, and Bower and Hatcher (1967) studied this process in soils. Some ground waters that are high in pH show high concentrations of fluoride, possibly owing to this effect (analysis 1, table 18).…”

Section: Resistatesmentioning

confidence: 99%

Study and interpretation of the chemical characteristics of natural water

1970

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Adsorption of Fluoride by Soils and Minerals

Cited by 137 publications

References 0 publications

Fluoride adsorption by a saline sodic soil irrigated with a high F water

Fluoride adsorption by a saline sodic soil irrigated with a high F water

Remaining phosphorus and sodium fluoride pH in soils with different clay contents and clay mineralogies

Study and interpretation of the chemical characteristics of natural water

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