MOLYBDENUM VERSUS TUNGSTEN BASED POLYOXOMETALATES FOR HIGHLY EFFECTIVE METHYLENE BLUE REMOVAL

Authors

Roula Abi Saad, Faculty of Science, Beirut Arab University, Debbieh, LebanonFollow
Ghassan Younes, Faculty of Science, Beirut Arab University, Debbieh, LebanonFollow
Mohammad H. El- Dakdouki, Faculty of Science, Beirut Arab University, Debbieh, LebanonFollow
Rami Al-Oweini, College of Arts and Sciences, University of La Verne, La Verne, CA 91750, USAFollow

Keywords

Polyoxometalates; SiW12; Mo8; Removal efficiency; Dyes

Disciplines

Architecture | Business | Engineering | Physical Sciences and Mathematics

Abstract

[SiW₁₂O₄₀]^4-(SiW₁₂) and [Mo₈O₂₆]^4- (Mo₈) were synthesized and characterized by Fourier Transform Infrared spectroscopy (FTIR). The prepared polyoxometalates were studied as potential adsorbents for the removal of methylene blue (MB) from an aqueous solution. Various operational parameters—contact time, adsorbent dose, initial dye concentration, pH, and temperature— were meticulously assessed by UV/Vis spectrophotometry to study its impact on the adsorption efficacy. An inverse relationship was observed between the percentage dye removal and the initial dye concentration, highlighting the complexes' superior adsorption capabilities under lower dye loads. The studied complexes displayed significantly better efficiency under acidic conditions. Both SiW₁₂ and Mo₈ exhibited high percentages of removal for methylene blue within only 10 min for MO₈ and 5 min for SiW₁₂. These results not only underline the proficiency of SiW₁₂ and Mo₈ as adsorbents, but also position them as promising candidates for fast and effective water purification strategies in the face of escalating environmental pollution challenges.

Author ORCID Identifier

Roula Abi Saad https://orcid.org/0009-0000-1937-5564

Ghassan Younes https://orcid.org/0000-0001-6927-3523

Mohammad H. El-Dakdouki https://orcid.org/0000-0003-0679-2267

Rami Al-Oweini https://orcid.org/0000-0003-1891-3716

Recommended Citation

Abi Saad, Roula; Younes, Ghassan; El- Dakdouki, Mohammad H.; and Al-Oweini, Rami (2023) "MOLYBDENUM VERSUS TUNGSTEN BASED POLYOXOMETALATES FOR HIGHLY EFFECTIVE METHYLENE BLUE REMOVAL," BAU Journal - Science and Technology: Vol. 5: Iss. 1, Article 8.
DOI: https://doi.org/10.54729/2959-331X.1116

ISSN

2959-331X