SW—Soil and Water

McGechan, M.B.; Lewis, D.R.

doi:10.1006/bioe.2002.0054

Cited by 164 publications

(38 citation statements)

References 120 publications

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“…Applying the Langmuir and Freundlich equations (cf. [13]) indicated that the near-equilibrium sorption of phosphate on a-Al 2 O 3 was best described (R 2 > 0.99) by the Frendlich isotherm (data not shown). Conformation of data to the Freundlich isotherm supported surface site heterogeneity, and multisite and/or multispecies sorption.…”

Section: Resultsmentioning

confidence: 98%

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Surface reactivity of α-Al2O3 and mechanisms of phosphate sorption: In situ ATR-FTIR spectroscopy and ζ potential studies

Nero

Galindo

Barillon

et al. 2010

Journal of Colloid and Interface Science

115

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Section: Resultsmentioning

confidence: 98%

“…In order to gain insights into the rate-limiting steps, several kinetic models, e.g., Elovich, intraparticle diffusion, and pseudo-second order (cf. [13]), were applied to each of our data series. Best fits with correlation coefficients higher than 0.99 are reported in Fig.…”

Section: Resultsmentioning

confidence: 99%

Surface reactivity of α-Al2O3 and mechanisms of phosphate sorption: In situ ATR-FTIR spectroscopy and ζ potential studies

Nero

Galindo

Barillon

et al. 2010

Journal of Colloid and Interface Science

115

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“…The slower reactions of P into more recalcitrant forms are not captured by this metric [53,54]. As evidenced by the P fraction data, annual soil P surpluses did not remain exclusively in the fast P-binding pools captured by the sorption isotherms.…”

mentioning

confidence: 90%

The fate of phosphorus fertilizer in Amazon soya bean fields

Riskin

Porder

Neill

et al. 2013

Phil. Trans. R. Soc. B

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Fertilizer-intensive soya bean agriculture has recently expanded in southeastern Amazonia, and whereas intensive fertilizer use in the temperate zone has led to widespread eutrophication of freshwater ecosystems, the effects in tropical systems are less well understood. We examined the fate of fertilizer phosphorus (P) by comparing P forms and budgets across a chronosequence of soya bean fields (converted to soya beans between 2003 and 2008) and forests on an 800 km 2 soya bean farm in Mato Grosso, Brazil. Soya bean fields were fertilized with 50 kg P ha −1 yr −1 (30 kg P ha −1 yr −1 above what is removed in crops). We used modified Hedley fractionation to quantify soil P pools and found increases in less-plant-available inorganic pools and decreases in organic pools in agricultural soils compared with forest. Fertilizer P did not move below 20 cm. Measurements of P sorption capacity suggest that while fertilizer inputs quench close to half of the sorption capacity of fast-reacting pools, most added P is bound in more slowly reacting pools. Our data suggest that this agricultural system currently has a low risk of P losses to waterways and that long time-scales are required to reach critical soil thresholds that would allow continued high yields with reduced fertilizer inputs.

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“…The mechanism of phosphates adsorption on aluminum hydroxide is modeled according Langmuir [20] and Freundlich [21], while adsorption on soil (mainly iron and aluminum oxides in the clay components) is modeled according to Freundlich or the two-surface Langmuir equations [22].…”

Section: Introductionmentioning

confidence: 99%