Nanoparticles in natural systems II: The natural oxide fraction at interaction with natural organic matter and phosphate

Hiemstra, Tjisse; Antelo, Juan; Rotterdam, A.M.D. van; Riemsdijk, W.H. van

doi:10.1016/j.gca.2009.10.019

Cited by 74 publications

(93 citation statements)

References 32 publications

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“…f Fitted using the 0.5 M NaHCO 3 equilibrium data. g Effective NOM loading calculated in order to explain the PO 4 concentration in 0.01 M CaCl 2 based on the R ev and A derived from 0.5 M HCO 3 equilibration (Hiemstra et al, 2010). oxalate of pH = 3.00, i.e.…”

Section: Natural Oxide Fractionmentioning

confidence: 99%

“…(Table 1) of the hypothetical species FeNOM has been calculated using Eq. (1) in part II (Hiemstra et al, 2010), interpreting the PO 4 concentration in 0.01 M CaCl 2 solution. The charge at the 0-, 1-, and 2-plane after formation of FeNOM is, respectively, 0, À1, and À0.5 v.u.…”

Section: Surface Complexation Modelingmentioning

confidence: 99%

“…In part I of this paper series, we discuss the determination of the effective surface area of the natural oxide fraction in field samples. In part II (Hiemstra et al, 2010), the effective NOM loading of the natural oxide fraction will be assessed. Both are required to apply surface complexation modeling to field samples.…”

Section: Introductionmentioning

confidence: 99%

“…This information will be applied in part II (Hiemstra et al, 2010) to analyze the effect of the presence of NOM at the surface of natural oxide particles under standardized field conditions, for fertilized top soils simulated by a 0.01 M CaCl 2 background electrolyte solution (van Erp et al, 1998). This will result in the calculation of an effective NOM density.…”

Section: Introductionmentioning

confidence: 99%

“…The phosphate loading varies remarkably (C % 1-3 lmol/m 2 oxide) in the samples. As discussed in part II of this paper series (Hiemstra et al, 2010), the phosphate loading (C) of field samples is suppressed by surface complexation of NOM, where hydrophilic, fulvic, and humic acids act as a competitor for (an)ions via site competition and electrostatic interaction. …”

mentioning

confidence: 99%

See 4 more Smart Citations

Nanoparticles in natural systems I: The effective reactive surface area of the natural oxide fraction in field samples

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Section: Natural Oxide Fractionmentioning

confidence: 99%

Section: Surface Complexation Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Nanoparticles in natural systems I: The effective reactive surface area of the natural oxide fraction in field samples

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Antelo

Rahnemaie

et al. 2010

Geochimica et Cosmochimica Acta

Self Cite

145

185

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Poly(ethylene‐co‐vinyl acetate)/calcium phosphate nanocomposites: Mechanical, gas permeability, and molecular transport properties

Thomas

Sreekumar

Aprem

et al. 2010

J of Applied Polymer Sci

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Poly(ethylene-co-vinyl acetate) (EVA)-based nanocomposites were prepared by melt mixing in an internal mixer with nanocalcium phosphate in different weight percentages. The nanocalcium phosphate with 10-nm size was prepared by the polymer-induced crystallization technique. The mechanical properties as well as the gas permeability tests were performed to analyze the effect of nanofiller incorporation in to the polymer. Molecular transport of different solvents such as water, benzene, and n-heptane was undertaken at room temperature for EVA nanocomposites with 0, 3, and 5% filler loading. Among the three, water showed less uptake and benzene showed maximum uptake. Transport parameters such as diffusion coefficient, sorption coefficient, and permeation coefficient were calculated, and all of them showed a decrease with respect to the filler loading. First-order kinetics model was applied to investigate the transport kinetics. Also, the sorption curves were compared to theoretical predictions and found to be in good agreement except for water.

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Modeling oxyanion adsorption on ferralic soil, part 1: Parameter validation with phosphate ion

Pérez

Antelo

Fiol

et al. 2014

Enviro Toxic and Chemistry

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Surface complexation models have proved to be valuable tools for predicting processes that occur at the solid-solution interface. Use of such models has become more widespread and nowadays more complex systems are studied, in an attempt to explain processes such as the competition between different species for mineral surfaces and the effect of the presence of organic matter. The aim of the present study was to analyze the mobility of phosphate in ferralic soils. The charge distribution model parameters for phosphate-goethite adsorption were used to predict phosphate mobility on samples from 2 horizons of a ferralic soil containing large amounts of iron oxides. The soil reactivity was attributed to the iron oxides, and some specific parameters were determined by means of phosphate adsorption-desorption experiments and included in the model. Adsorption of phosphate in the upper horizon, which contained more organic carbon and phosphate than the deeper one, was modeled by using the information obtained for the soil and the charge distribution model parameters derived for phosphate-goethite interaction with no need of further optimization. In contrast, some extra fitting parameters were required to improve the modeling of the phosphate adsorption in the deeper horizon.

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Nanoparticles in natural systems II: The natural oxide fraction at interaction with natural organic matter and phosphate

Cited by 74 publications

References 32 publications

Nanoparticles in natural systems I: The effective reactive surface area of the natural oxide fraction in field samples

Nanoparticles in natural systems I: The effective reactive surface area of the natural oxide fraction in field samples

Poly(ethylene‐co‐vinyl acetate)/calcium phosphate nanocomposites: Mechanical, gas permeability, and molecular transport properties

Modeling oxyanion adsorption on ferralic soil, part 1: Parameter validation with phosphate ion

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