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2023 | 49 | 1-13

Article title

Aqueous sequestration of Lead Ions by Zn-based metal-organic framework (MOF5): Equilibrium, kinetics, and pH studies

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EN

Abstracts

EN
Lead is a potentially toxic metal which easily contaminates water forms due to it ubiquitous applications. The demonstration of viable techniques to remove Lead ions from water is one of the most researched topics. In this study, the highly reported surface and pore advantages exhibited by metal-organic frameworks is exploited for the trapping of aqueous Lead. The Zinc-based MOF5 was synthesized for adsorption tests involving the sequestration of Lead ions. Tests were conducted to determine the effects of concentration, contact time and pH in the uptake of Lead ions from solution. The extent of adsorption was evaluated as percentage uptake of Lead and Lead uptake capacity of MOF5. The results showed that while the percentage uptake and Lead uptake capacity of MOF5 depended on the concentration and pH of solution, contact time had only minimal effects. Five adsorption isotherms were applied to evaluate the adsorption data including Dubinin-Radushkevich, Freundlich, Langmuir, Elovich and Jovanovich. However, the R2 values gave the Elovich isotherm (R² = 0.8029) as the best fitting model, implying the dominance of multilayer interaction between MOF5 and Lead ions. The pseudo-second-order kinetics and the Webber-Morris intraparticle diffusion were also applied to evaluate the kinetics of the process. The pseudo-second-order kinetic plots was observed to provide the better fit to the kinetics, ahead of the Webber-Morris intraparticle diffusion, depicting the dominance of chemisorption. The high percentage (> 90 %) of Lead ions taken up, and the high capacity of MOF5 for the ions, as observed across all three types of adsorption tests performed, demonstrates that MOF5 (> 45 mg/g)) could represent an efficient adsorbent for the targeted separation of Lead ions during water treatment.

Year

Volume

49

Pages

1-13

Physical description

Contributors

  • Department of Chemical Sciences, Faculty of Basic and Applied Science, University of Africa, Toru-Orua, Bayelsa State, Nigeria
  • Department of Chemical Sciences, Faculty of Science, Niger Delta University, Wilberforce Island, Amassoma, Bayelsa State, Nigeria

References

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  • [2] Alghamdi, A. A., Al-Odayni, A.-B., Saeed, W. S., Al-Kahtani, A., Alharthi, F. A., & Aouak, T. (2019). Efficient Adsorption of Lead (II) from Aqueous Phase Solutions Using Polypyrrole-Based Activated Carbon. Materials, 12(12), 2020. https://doi.org/10.3390/ma12122020
  • [3] Alorabi, A. Q., Alharthi, F. A., Azizi, M., Al-Zaqri, N., El-Marghany, A., & Abdelshafeek, K. A. (2020). Removal of Lead(II) from Synthetic Wastewater by Lavandula pubescens Decne Biosorbent: Insight into Composition–Adsorption Relationship. Applied Sciences, 10(21), Article 21. https://doi.org/10.3390/app10217450
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  • [6] Hammud, H. H., El-Shaar, A., Khamis, E., & Mansour, E.-S. (2014). Adsorption Studies of Lead by Enteromorpha Algae and Its Silicates Bonded Material. Advances in Chemistry, 2014, e205459. https://doi.org/10.1155/2014/205459
  • [7] Mekonen Ayele, N. (2022). Efficient Removal Lead (II) from the Environment by Adsorption Using Low-Cost Adsorbent Materials. American Journal of Mechanical and Materials Engineering, 6(1), 1. https://doi.org/10.11648/j.ajmme.20220601.11
  • [8] Mobasherpour, I., Salahi, E., & Ebrahimi, M. (2014). Thermodynamics and kinetics of adsorption of Cu(II) from aqueous solutions onto multi-walled carbon nanotubes. Journal of Saudi Chemical Society, 18(6), 792–801. https://doi.org/10.1016/j.jscs.2011.09.006
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  • [10] Shi, Q., Sterbinsky, G. E., Prigiobbe, V., & Meng, X. (2018). Mechanistic Study of Lead Adsorption on Activated Carbon. Langmuir, 34(45), 13565–13573. https://doi.org/10.1021/acs.langmuir.8b03096
  • [11] Steven S. Kaye, Anne Dailly, Omar M. Yaghi, and Jeffrey R. Long, Impact of Preparation and Handling on the Hydrogen Storage Properties of Zn4O(1,4-benzenedicarboxylate)3 (MOF-5). J. Am. Chem. Soc. 2007, 129, 46, 14176–14177 .https://doi.org/10.1021/ja076877g
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Document Type

article

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.psjd-2c545c4a-0d75-4c89-968c-8d1a155cff91
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