Glyphosate and AMPA sorption onto synthetic iron (oxyhydr)oxides: A comparative study

IF 5.3 2区化学 Q2 CHEMISTRY, PHYSICAL Journal of Molecular Liquids Pub Date : 2025-03-11 DOI:10.1016/j.molliq.2025.127303

Alana Deduck Cicilinski , Vander Freitas Melo , Patricio Peralta-Zamora

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Abstract

Glyphosate (GLY) and its metabolite AMPA are highly soluble in water, potentially facilitating their transport through soil. However, the strong reactivity of their phosphonic and carboxylic groups promotes interactions with organic and inorganic soil components, significantly limiting mobility and effectively preventing leaching. This study evaluates the sorption of GLY and AMPA on synthetic colloids, specifically goethite (Gt, α-FeOOH), hematite (Hm, α-Fe₂O₃) and ferrihydrite (Fh, Fe₅HO₈·4H₂O). The sorption of GLY and AMPA on Fe oxides is kinetically favored, being mainly controlled by the intraparticle diffusion process. AMPA generally fits better to the Freundlich model, indicating electrostatic interactions and the formation of outer-sphere complexes. In contrast, GLY aligns more closely with the Langmuir-Freundlich or Langmuir model, suggesting specific chemical interactions, likely involving ligand exchange between the oxygen of the phosphonic group and the biprotonated ferric hydroxyl group (Fe–OH₂^+0.5). The results indicate that Fe oxides exhibit similar adsorption capacities for GLY.

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.