Adsorption of commercial glyphosate by MOF-808: a new ZrMOF for water purification

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL Adsorption Pub Date : 2024-04-14 DOI:10.1007/s10450-024-00451-0

Caroline B. C. Almeida, Célia M. Ronconi, Danilo R. H. de Miranda, Isabela A. A. Bessa, Honério C. de Jesus, Priscilla P. Luz

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Abstract

This work reports for the first time the use of MOF-808 for the adsorption of glyphosate from a diluted herbicide formulation (Roundup®). MOF-808 was synthesized in organic solvent (MOF-808(DMF)) or in water (MOF-808(H₂O)) to compare the influence of textural characteristics on the adsorption process. In addition, the adsorption performances of these materials were compared to those of the UiO-66 and UiO-66(NH₂) series materials, which have the same SBU, allowing us to evaluate the influence of the topicity and functionalization of the ligand on the adsorption capacity of glyphosate. MOF-808 showed the highest adsorption capacity, reaching a q_max equal to 277.01 mg g⁻¹, and good kinetic performance, removing 70.3% of the glyphosate from solution in 10 min and 99.5% after 3 h of contact. MOFs UiO-66 and UiO-66(NH₂) had lower q_max values than MOF-808, possibly due to the blockage of their narrow pores by GLY, which prevents them from accessing Zr sites. The results showed an important relationship between the hydrodynamic diameter and the pore size distribution with access to active sites, consequently influencing the adsorption performance of these porous materials.

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MOF-808对商用草甘膦的吸附：一种用于水净化的新型ZrMOF

本研究首次报道了使用 MOF-808 来吸附稀释除草剂配方（Roundup®）中的草甘膦。MOF-808 在有机溶剂（MOF-808(DMF)）或水中（MOF-808(H2O)）合成，以比较质地特征对吸附过程的影响。此外，我们还将这些材料的吸附性能与具有相同 SBU 的 UiO-66 和 UiO-66(NH2) 系列材料进行了比较，从而评估了配体的主题性和功能化对草甘膦吸附能力的影响。MOF-808 的吸附能力最高，qmax 达到 277.01 mg g-1，而且动力学性能良好，10 分钟内就能从溶液中去除 70.3% 的草甘膦，接触 3 小时后去除率达到 99.5%。与 MOF-808 相比，MOFs UiO-66 和 UiO-66(NH2)的 qmax 值较低，这可能是由于其狭窄的孔隙被 GLY 堵塞，阻碍了它们进入 Zr 位点。研究结果表明，流体力学直径和孔径分布与活性位点的进入之间存在重要关系，从而影响了这些多孔材料的吸附性能。

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.