Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Interaction between calcium and phosphate adsorption on goethite.

R P Rietra1, T Hiemstra, W H van Riemsdijk

  • 1Department of Environmental Sciences, Wageningen University, The Netherlands.

Environmental Science & Technology
|September 1, 2001
PubMed
Summary

Calcium (Ca) and phosphate (PO4) interact strongly on goethite surfaces, influencing phosphate mobility in soils and sediments. A new model predicts these interactions electrostatically, crucial for understanding environmental phosphate levels.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Use of iron oxide nanoparticles for immobilizing phosphorus in-situ: Increase in soil reactive surface area and effect on soluble phosphorus.

The Science of the total environment·2019
Same author

High-birefringence direct UV-written waveguides for use as heralded single-photon sources at telecommunication wavelengths.

Optics express·2018
Same author

Free-space spectro-temporal and spatio-temporal conversion for pulsed light.

Optics letters·2016
Same author

Asymmetric flow field-flow fractionation of manufactured silver nanoparticles spiked into soil solution.

Journal of chromatography. A·2015
Same author

Long-term kinetics of phosphate release from soil.

Environmental science & technology·2012
Same author

Metal ion binding to humic substances: application of the non-ideal competitive adsorption model.

Environmental science & technology·2011

Area of Science:

  • Environmental Chemistry
  • Soil Science
  • Geochemistry

Background:

  • Phosphate (PO4) bioavailability and mobility in soil, water, and sediment are governed by poorly understood ion interactions.
  • Metal hydroxides bind PO4 in natural systems, but adsorption behavior often deviates from laboratory findings.
  • Calcium (Ca) influences PO4 adsorption equilibria, necessitating study of their combined interactions.

Purpose of the Study:

  • To investigate the interaction between PO4 and Ca adsorption on goethite.
  • To develop a predictive model for Ca-PO4 interactions on goethite surfaces under environmentally relevant conditions.

Main Methods:

  • Conducted adsorption experiments with PO4 and Ca, individually and combined, on goethite.
  • Controlled conditions to prevent Ca-PO4 solid precipitation, isolating adsorption phenomena.

Related Experiment Videos

  • Utilized electrostatic arguments and model parameters from single-ion systems for prediction.

    • Main Results:

    • A strong interaction between adsorbed Ca and PO4 was observed on goethite below the apatite saturation index.
    • The study successfully predicted Ca-PO4 adsorption and interaction using electrostatic principles.
    • Model parameters derived from single-ion adsorption were sufficient, without needing ternary complex formation or precipitation.

    Conclusions:

    • Electrostatic interactions govern the combined adsorption of Ca and PO4 on goethite.
    • A predictive model based on single-ion data can accurately describe Ca-PO4 interactions.
    • This approach is valuable for predicting Ca-PO4 interactions at environmentally relevant concentrations.