CEDECOR (Centro de Estudio de Compuestos Orgánicos), Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), Calle 115 y 47, (1900), La Plata, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Argentina.
Instituto de Física del Sur (IFISUR), Departamento de Física, Universidad Nacional del Sur (UNS), CONICET, Av. L. N. Alem 1253, B8000CPB Bahía Blanca, Argentina; Universidad Tecnológica Nacional(UTN), 11 de Abril 461, B8000LMI Bahía Blanca, Argentina; CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas), Argentina.
J Contam Hydrol. 2019 Dec;227:103542. doi: 10.1016/j.jconhyd.2019.103542. Epub 2019 Aug 20.
In this study, silica and functionalized silica materials (3-aminopropyl and 3-mercapto derivatives) were successfully used for the removal of the pesticides bentazone and imazapyc from aqueous solutions. Adsorbent materials were characterized by BET isotherms and FT-IR spectroscopy (confirming the functionalization), and their equilibrium adsorption capacity was evaluated at different ionic strengths. It is observed that the maximum adsorption capacities decrease in the order 3-aminopropyl-derivative > silica >3-mercaptopropyl derivative. An increase in ionic strength produces an enhancement in the removal of pesticides. All isotherms are Ib-type and follow the Langmuir model, suggesting a monolayer physical adsorption process.
在这项研究中，成功地使用了二氧化硅和功能化二氧化硅材料（3-氨丙基和 3-巯基衍生物）来去除水溶液中的农药苯达松和咪草烟。通过 BET 等温线和 FT-IR 光谱对吸附剂材料进行了表征（证实了功能化），并在不同离子强度下评估了它们的平衡吸附容量。观察到最大吸附容量的顺序为 3-氨丙基衍生物>二氧化硅>3-巯丙基衍生物。离子强度的增加会增强农药的去除。所有的等温线都是 Ib 型，并遵循朗缪尔模型，表明这是一个单层物理吸附过程。
