TY - JOUR

T1 - Surface interaction of glyphosate with iron and chromium oxides

AU - Немков, Александр А.

AU - Егоров, Семен Сергеевич

AU - Крылов, Алексей

AU - Пестова, Ольга Николаевна

AU - Федорова, Анна Викторовна

AU - Пузырьков, Артур Александрович

AU - Колоницкий, Петр Дмитриевич

AU - Бобрышева, Наталья Петровна

AU - Суходолов, Николай Геннадьевич

AU - Пенькова, Анастасия Владимировна

AU - Селютин, Артем Александрович

PY - 2025/3/20

Y1 - 2025/3/20

N2 - A microwave synthesis of porous iron and chromium oxides was performed from aqueous solutions of metal nitrates with urea. The resulting oxides were characterized by X-ray phase analysis and scanning electron microscopy. Both oxides were found to have the same rutile crystal structure (R̅3c). The specific surface area was measured using the Brunauer-Emmett-Teller (BET) method. The specific surface areas were 45 and 142 m2/g for chromium oxide and iron oxide, respectively. The study of the dependence of the adsorption of the pesticide glyphosate on the real surface area of chromium and iron oxides as soil components will allow the determination of the effect of process parameters on the sorption properties of individual metal oxides and soils as a whole. A model for the interaction of adsorbate molecules with the surface of sorption materials will be developed from the understanding of this process. Differences in the adsorption of glyphosate on the metal oxide surface at different pH values are explained by the presence of two contributions to the interaction of the glyphosate molecule with the oxide surface - coordination and electrostatic. The combined influence of the metal oxide surface structure and the way glyphosate exists in solutions at different pH and temperature has been demonstrated by different types of adsorption isotherms, by dependence on the donor strength of the adsorbing eluent and by calculating the thermodynamic parameters of the process.

AB - A microwave synthesis of porous iron and chromium oxides was performed from aqueous solutions of metal nitrates with urea. The resulting oxides were characterized by X-ray phase analysis and scanning electron microscopy. Both oxides were found to have the same rutile crystal structure (R̅3c). The specific surface area was measured using the Brunauer-Emmett-Teller (BET) method. The specific surface areas were 45 and 142 m2/g for chromium oxide and iron oxide, respectively. The study of the dependence of the adsorption of the pesticide glyphosate on the real surface area of chromium and iron oxides as soil components will allow the determination of the effect of process parameters on the sorption properties of individual metal oxides and soils as a whole. A model for the interaction of adsorbate molecules with the surface of sorption materials will be developed from the understanding of this process. Differences in the adsorption of glyphosate on the metal oxide surface at different pH values are explained by the presence of two contributions to the interaction of the glyphosate molecule with the oxide surface - coordination and electrostatic. The combined influence of the metal oxide surface structure and the way glyphosate exists in solutions at different pH and temperature has been demonstrated by different types of adsorption isotherms, by dependence on the donor strength of the adsorbing eluent and by calculating the thermodynamic parameters of the process.

KW - Clay minerals

KW - Sorption

KW - Sorption thermodynamics parameters

KW - Specific surface area

KW - Surface complexes

UR - https://www.mendeley.com/catalogue/478e1080-43e5-321c-ba84-662992524dcd/

U2 - 10.1016/j.colsurfa.2025.136114

DO - 10.1016/j.colsurfa.2025.136114

M3 - Article

VL - 709

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

IS - 2

M1 - 136114

ER -