What question did this study set out to answer?

This research aims to understand how organic acids influence phosphate adsorption on Fe and Al minerals to improve phosphorus retention in soils.

Competitive Adsorption of Phosphate and Organic Acids on Fe and Al Oxy(Hydroxides): XAS Simulation Insights

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Randomized trial explores phosphate retention affected by organic acids in soil, suggesting mechanistic insights for soil management.

This research aims to understand how organic acids influence phosphate adsorption on Fe and Al minerals to improve phosphorus retention in soils.
Conducted batch experiments with different organic acids and minerals.
Utilized micro-XRF mapping and XANES spectroscopy for analysis.
Performed ab initio multiple scattering calculations to simulate adsorption processes.
Phosphate affinity to minerals ranked: hematite > kaolinite > boehmite > goethite.
Organic acid competitiveness followed: humic > citric > oxalic > acetic.
XANES analysis revealed strong inner-sphere bidentate binuclear Fe−O−P and Al−O−P complexes.

Yusuf et al. (2026) studied this question.

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