Kinetics of Molybdate and Phosphate Sorption by Some Chilean Andisols

G, Erika Marina Vistoso; Bolan, Nanthi; Theng, B. K. G.; Mora, Marı́a de la Luz

doi:10.4067/s0718-27912009000100005

Cited by 18 publications

(28 citation statements)

References 24 publications

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“…The present results also accord with those derived from kinetic measurements, using the same anions and soils (Vistoso et al, 2009). …”

Section: Mo and P Competitive Sorption In Andisolssupporting

confidence: 82%

“…The observed increase in supernatant pH due to Mo sorption ( Figure 3a) clearly indicates that the underlying mechanism is one of ligand exchange between molybdate ions in solution and surface hydroxyl groups, similar to that proposed for phosphate (Goldberg & Sposito, 1985;Parfitt, 1989;Goldberg et al, 2008;Vistoso, 2005;Vistoso et al, 2009). As a result, the net negative surface charge would increase (Bolan & Barrow, 1984;Bolan et al, 1986;Theng et al, 2005), while the sorption capacity of the soils for both P and Mo anions would decrease (Figures 1 and 2).…”

Section: Fitted Lines) Mo and P Competitive Sorption In Andisolsmentioning

confidence: 58%

“…The relationship between different soil properties and phosphate sorption capacity of Andisols has been extensively investigated (Bolan & Barrow, 1984;Barrow, 1985;Parfitt, 1989) but less information with respect to molybdate sorption. Our preliminary results (Vistoso, 2005;Vistoso et al, 2009) suggest that the mineralogical composition and organic matter content of the Andisols control the kinetics of the sorption of both molybdate and phosphate. Molybdate appeared to have a high affinity for Fe-and Al-oxides, while phosphate was largely sorbed to Fe-and Al-humus complexes and clay minerals (allophane and ferrihydrite).…”

Section: Introductionmentioning

confidence: 99%

“…According previous studies (Vistoso et al, 2009;Lopez et al, 2007) The high anion retention capacity of Andisols affects the mobility and bioavailability of anions such as phosphate and molybdate, thereby resulting in the low efficiency of phosphate and molybdate fertilizers in these soils (Ribera et al, 2010). The relationship between different soil properties and phosphate sorption capacity of Andisols has been extensively investigated (Bolan & Barrow, 1984;Barrow, 1985;Parfitt, 1989) but less information with respect to molybdate sorption.…”

Section: Introductionmentioning

confidence: 99%

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Competitive sorption of molybdate and phosphate in Andisols

Vistoso

Theng

Bolan

et al. 2012

J. Soil Sci. Plant Nutr.

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We have examined the effects of both pH and phosphate concentrations on molybdate sorption by four Chilean Andisols with varying chemical properties. For both anions adsorption decreased with an increase in soil pH and also with organic matter content in the soils. In general, more phosphate than molybdate was sorbed by the soils. The Freundlich equation adequately described adsorption of both anions. Differences in the extent of sorption of molybdate and phosphate and in isotherm shape between soils were ascribed to variations in soil properties. The competitive sorption data were adequately described by the multicomponent Freundlich equations. Phosphate strongly competed with molybdate for sorption sites on the Andisols, causing molybdate sorption to decrease by 10−27%. The competition coefficients for phosphate and molybdate sorption were variable, indicating that competition between the two anions was not symmetrical. The present results provide further evidence to indicate that the surfaces of Andisols are rich in reactive Al-OH and Fe-OH groups, exposed at colloidal particle surfaces. Molybdate sorption appeared to be mainly associated with free Al-and Fe-oxides, while phosphate sorption was primarily regulated by Al-and Fe-humus complexes.

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“…The present results also accord with those derived from kinetic measurements, using the same anions and soils (Vistoso et al, 2009). …”

Section: Mo and P Competitive Sorption In Andisolssupporting

confidence: 82%

Section: Fitted Lines) Mo and P Competitive Sorption In Andisolsmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Competitive sorption of molybdate and phosphate in Andisols

Vistoso

Theng

Bolan

et al. 2012

J. Soil Sci. Plant Nutr.

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“…Phosphates compete with molybdates for adsorption sites on the surface of the solid soil layer. As a result of this process, desorption of MoO 4 2-into the soil solution is enhanced (Vistoso et al 2009). …”

Section: Resultsmentioning

confidence: 99%

Soil micronutrient availability to crops affected by long-term inorganic and organic fertilizer applications

Rutkowska¹,

Szulc²,

Sosulski³

et al. 2014

Plant Soil Environ.

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The effects of mineral and organic fertilization on the contents of Fe, Cu, Zn, Mn, B and Mo in soil and in the soil solution as well as on availability of these elements for crops were investigated in the long-term field trial. The highest contents of Zn, Fe, Mn and Cu in soil and soil solution were observed in the treatment with the lowest pH (NPK). In this same combination the content of B and Mo was the lowest. The concentration of Zn, B and Fe in the soil solution significantly increased under farmyard manure application. Liming significantly decreased contents extractable by 1 mol/L HCl forms of Mn and Zn and significantly increase the content of Mo in the soil. Regardless of fertilization applied, microelement concentrations in the soil solution are sufficient for fulfilling nutritional needs of plants cultivated during the trial.

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Cluster roots of Embothrium coccineum (Proteaceae) affect enzyme activities and phosphorus lability in rhizosphere soil

et al. 2015

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Background and aim Cluster roots have a profound effect on their rhizosphere. Our aim was to determine the effect of cluster roots of Embothrium coccineum, growing under natural conditions, on soil enzyme activities and phosphorus (P) lability in its rhizosphere. Methods We determined enzyme activities: acid phosphatase (P-ase), dehydrogenase and β-glucosidase, and the rate of hydrolysis of fluorescein diacetate (FDA), as well as P fractions in the cluster root rhizosphere at different cluster-root developmental stages (juvenile, mature, semi-senescent, senescent), in the non-cluster root rhizosphere, and in bulk soil. In addition, the concentrations of total P and manganese Mn in roots was measured. ResultsThe rhizosphere of senescing cluster roots presented the highest P-ase, β-glucosidase and dehydrogenase activities, and fastest rate of FDA hydrolysis, being 2.6-, 4.6-, 3.3-and 25.8-fold greater, respectively, than those in the rhizosphere of mature cluster roots. The P fractionation showed that the inorganic P (Pi) fraction was 15 % greater in the rhizosphere of mature cluster roots than in that of other stages. Mature cluster roots showed the highest total [P], suggesting the fastest P uptake. Conclusion Cluster roots of E. coccineum modified their rhizosphere depending on their developmental stage, presenting lower soil enzyme activities at the mature stage than at other development stages. In addition, mature cluster roots increased the Pi fraction in their rhizosphere, allowing the highest total root [P] at this developmental stage.

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Kinetics of Molybdate and Phosphate Sorption by Some Chilean Andisols

Cited by 18 publications

References 24 publications

Competitive sorption of molybdate and phosphate in Andisols

Competitive sorption of molybdate and phosphate in Andisols

Soil micronutrient availability to crops affected by long-term inorganic and organic fertilizer applications

Cluster roots of Embothrium coccineum (Proteaceae) affect enzyme activities and phosphorus lability in rhizosphere soil

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