Kinetic Model for Phosphate Transport and Transformation in Calcareous Soils: II. Laboratory and Field Transport

Enfield, Carl G.; Phan, To; Walters, David

doi:10.2136/sssaj1981.03615995004500060011x

Cited by 21 publications

(7 citation statements)

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“…Mansell et al (1977aMansell et al ( , 1977b examined two types of first-order irreversible precipitation or chemical immobilization terms and concluded that a finite sink term would have been more appropriate in their study than the infinite sink term they used. Enfield et al (1981) used a first-order mass loss term. Several studies (i.e., Shutter et al 1994;Lee et al 1998;McCray et al 2000) have used a first-order decay-type term to account for precipitation while also considering reversible sorption.…”

Section: Phosphorus Transport and Transformationmentioning

confidence: 99%

Model Parameters for Simulating Fate and Transport of On‐Site Wastewater Nutrients

et al. 2005

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This paper presents a critical review of model-input parameters for transport of on-site wastewater treatment system (OWS) pollutants. Approximately 25% of the U.S. population relies on soil-based OWS for effective treatment and protection of public health and environmental quality. Mathematical models are useful tools for understanding and predicting the transport and fate of wastewater pollutants and for addressing water-budget issues related to wastewater reclamation from site to watershed scales. However, input parameters for models that simulate fate and transport of OWS pollutants are not readily obtained. The purpose of this analysis is to illustrate an objective, statistically supported method for choosing model-input parameters related to nitrogen (N) and phosphorus (P). Data were gathered from existing studies reported in the literature. Cumulative frequency distributions (CFDs) are provided for OWS effluent concentrations of N and P, nitrification and denitrification rates, and linear sorption isotherm constants for P. When CFDs are not presented, ranges and median values are provided. Median values for model-input parameters are as follows: total N concentration (44 mg/L), nitrate-N (0.2 mg/L), ammonium (60 mg/L), phosphate-P (9 mg/L), organic N (14 mg/L), zero-order nitrification rate (264 mg/L/d), first-order nitrification (2.9/d), first-order dentrification (0.025/d), maximum soil capacity for P uptake (237 mg/kg), linear sorption isotherm constant for P (15.1 L/kg), and OWS effluent flow rates (260 L/person/d).

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Section: Phosphorus Transport and Transformationmentioning

confidence: 99%

Model Parameters for Simulating Fate and Transport of On‐Site Wastewater Nutrients

et al. 2005

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“…That is, by conceptual structuring of the processes involved between land uses and the ultimate impact on receiving water quality, modelling clarifies data and research needs. The phenomena connected with chemical and biological material transported from rainfall runoff to receiving waters constitute two broad areas of research: (a) transformations in the form and amount of material present on the land surface, and (b) the transfer and transport of material from the land surface into water moving across or through the land and ultimately to receiving waters (Khaleel et al, 1980;Overcash & Davidson, 1980;Enfield et al, 1981;Correll, 1997;Eggen & Majcherczyk, 2006).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of a shelterbelt in decreasing the level of inorganic elements in agricultural landscape

Szajdak¹,

Zyczynska-Baloniak²

2013

Estonian J. Ecol.

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Concentrations of calcium, magnesium, and carbon in inorganic compounds were measured in the groundwater crossing a shelterbelt. The differences among the concentrations of Ca, Mg, and C in inorganic compounds were attributed solely to the width of the shelterbelt. This biogeochemical barrier efficiently decreased the concentrations of chemical substances: the fall in the dry mass was 30-75%, in Ca 20-54%, in Mg 46-72%, and in C in inorganic compounds 58-71%.

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“…Mathematical models, however, are often used to describe the transport of P subjected to adsorption and/or precipitation (Enfield et al 1981;Van Rees et al 1990;Cho 1991;Grant and Heaney 1997;Villani et al 1998), and can be successfully used to investigate such effects.…”

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confidence: 99%

Phosphorus diffusion from monocalcium phosphate co-applied with salts in a calcareous soil

Kumaragamage¹,

Akinremi²,

Cho³

et al. 2004

Can. J. Soil. Sci.

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. 2004. Phosphorus diffusion from monocalcium phosphate coapplied with salts in a calcareous soil. Can. J. Soil Sci. 84: 447-458. Mixing non-phosphatic salts with fertilizer P influences the solubility and mobility of P in soils. Little evidence, however, is available regarding the mechanisms causing such effects. The objectives of this study were to investigate the effects of mixing fertilizer P with (NH 4 ) 2 SO 4 , MgSO 4 or (NH 2 ) 2 CO on the diffusion of P in a calcareous soil (Gleyed Rego Black Chernozem), and to identify the causes for such effects. To the surface of 50-mm-long soil columns, maintained at field capacity water content, 32 P-labelled monocalcium phosphate (MCP) was applied alone or in combination with (NH 4 ) 2 SO 4 , MgSO 4 or (NH 2 ) 2 CO. Ratios of applied P:N, P:Mg and P:S were 1:5, 1:4.5 and 1:6, respectively. Extraction and analysis of each 2-mm layer of the columns after incubation for 1, 2, 3, and 4 wk revealed that the addition of (NH 4 ) 2 SO 4 and MgSO 4 with MCP significantly increased P diffusion whereas (NH 2 ) 2 CO had little or no effect. The mechanisms of such effects were identified using a multi-ionic, mechanistic, diffusion model. According to model predictions, the dissolution of MCP was increased by more than twofold when mixed with (NH 4 ) 2 SO 4 and MgSO 4 , and by 1.2-fold when mixed with urea. The main difference between SO 4 salts and urea in affecting P diffusion was the competition between the anion of the salt and P for precipitation with Ca. Sulphate competed strongly with P, reducing the precipitation of Ca phosphates. Application of urea increased soil pH initially, but eventually soil pH decreased with nitrification of NH 4 . Initial increase in pH to above 8.0 favoured precipitation of Ca phosphate, but the pH was not high enough to favour CaCO 3 precipitation. The application of P fertilizers with fertilizers containing SO 4 could be beneficial in calcareous soils due to enhancement of P solubility and mobility. Mélanger des sels non phosphatés à un engrais phosphaté (P) modifie la solubilité et la mobilité du P dans le sol. Toutefois, on sait peu de choses sur les mécanismes à l'origine de ce phénomène. L'étude devait préciser comment le fait de mélanger un engrais P avec du (NH 4 ) 2 SO 4 , du MgSO 4 ou du (NH 2 ) 2 CO agit sur la diffusion du P dans un sol calcaire (tchernoziom noir gléyifié Rego) et établir les causes des modifications observées. À cette fin, les auteurs ont appliqué du phosphate monocalcique (PMC) marqué au 32 P avec ou sans (NH 4 ) 2 SO 4 , MgSO 4 ou (NH 2 ) 2 CO au sommet de colonnes de sol de 50 mm de hauteur dont la teneur en eau était maintenue à la capacité maximale du terrain. Les ratios appliqués étaient respectivement de 1:5, 1:4,5 et 1:6 pour P:N, P:Mg et P:S. Après incubation pendant 1, 2, 3 ou 4 semaines, l'extraction et l'analyse de chaque tranche de 2 mm des colonnes révèle que l'addition de (NH 4 ) 2 SO 4 et de MgSO 4 au PMC accroît sensiblement la diffusion du P alors que le (NH 2 ) 2 CO n'a pas d'effet sur ce phénom...

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Kinetic Model for Phosphate Transport and Transformation in Calcareous Soils: II. Laboratory and Field Transport

Cited by 21 publications

References 0 publications

Model Parameters for Simulating Fate and Transport of On‐Site Wastewater Nutrients

Model Parameters for Simulating Fate and Transport of On‐Site Wastewater Nutrients

Effectiveness of a shelterbelt in decreasing the level of inorganic elements in agricultural landscape

Phosphorus diffusion from monocalcium phosphate co-applied with salts in a calcareous soil

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