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

IF 5.2 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

{"title":"Glyphosate and AMPA sorption onto synthetic iron (oxyhydr)oxides: A comparative study","authors":"Alana Deduck Cicilinski , Vander Freitas Melo , Patricio Peralta-Zamora","doi":"10.1016/j.molliq.2025.127303","DOIUrl":null,"url":null,"abstract":"<div><div>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-Fe<sub>2</sub>O<sub>3</sub>) and ferrihydrite (Fh, Fe<sub>5</sub>HO<sub>8</sub>·4H<sub>2</sub>O). 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–OH<sub>2</sub><sup>+0.5</sup>). The results indicate that Fe oxides exhibit similar adsorption capacities for GLY.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"426 ","pages":"Article 127303"},"PeriodicalIF":5.2000,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Liquids","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167732225004702","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

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.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

合成氧化铁吸附草甘膦和AMPA的比较研究

草甘膦（GLY）及其代谢物AMPA极易溶于水，可能促进其通过土壤的运输。然而，它们的磷基和羧基的强反应性促进了与有机和无机土壤组分的相互作用，极大地限制了流动性，有效地防止了淋滤。本研究考察了GLY和AMPA在合成胶体上的吸附性能，特别是针铁矿（Gt, α-FeOOH）、赤铁矿（Hm, α-Fe2O3）和水合铁（Fh, Fe5HO8·4H2O）。GLY和AMPA在Fe氧化物上的吸附在动力学上是有利的，主要受颗粒内扩散过程控制。AMPA通常更符合Freundlich模型，表明静电相互作用和外球配合物的形成。相比之下，GLY更接近Langmuir- freundlich或Langmuir模型，表明特定的化学相互作用，可能涉及磷酸基氧和双质子化铁羟基（Fe-OH2 +0.5）之间的配体交换。结果表明，Fe氧化物对GLY具有相似的吸附能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

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.