[en] Infectious diseases caused by microorganisms pose a significant public health challenge. In response, metal oxide have gained attention for their antimicrobial properties. Among these, magnesium oxide (MgO) stands out due to its effectiveness, low toxicity, and classification as “Generally Recognized As Safe” (GRAS) by the FDA. This study investigates the green synthesis of MgO using byproducts from cassava ( Manihot esculenta )—including starch, fiber, and manipueira—as organic fuels. We evaluate how these fuels affect the structural, morphological, and antibacterial properties of the resulting nanoparticles. MgO were synthesized by calcining magnesium nitrate with cassava-derived fuels. The resulting materials were characterized using XRD, SEM-EDX, XPS and BET-BJH. All samples exhibited crystalline periclase MgO, with both morphology and surface properties significantly affected by the fuel used. Notably, MgO-St (Starch) exhibited the highest surface area (50.56 m2/g) and pore volume, while the samples MgO-Fb (Fiber) and MgO-Mnp (Manipueira) displayed lower porosity but unique morphologies. Antibacterial activity was assessed against Escherichia coli and Staphylococcus aureus . All synthesized oxides demonstrated strong inhibitory effects, with MgO-St achieving the highest efficiency (98.96% for E. coli and 99.79% for S. aureus ), surpassing even commercial MgO. The superior performance of MgO-St is attributed to its larger surface area, higher oxygen content, and favorable pore structure. Overall, cassava byproducts have proven to be effective and eco-friendly fuels for MgO synthesis. These findings highlight MgO's potential as a sustainable antimicrobial agent for food and water safety applications, reinforcing its role in combating microbial contamination.
Disciplines :
Chemistry
Author, co-author :
Balaba, Nayara ; Chimie des Interactions Plasma-Surface (ChIPS), Research Institute for Materials Science and Engineering, University of Mons, Mons, Belgium ; Department of Chemistry, Universidade Estadual Do Centro-Oeste, UNICENTRO, Guarapuava, Brazil
Gualle, Arleth ; Chimie des Interactions Plasma-Surface (ChIPS), Research Institute for Materials Science and Engineering, University of Mons, Mons, Belgium
De Campos, Daniele ; Chimie des Interactions Plasma-Surface (ChIPS), Research Institute for Materials Science and Engineering, University of Mons, Mons, Belgium
Noirfalise, Xavier; Chimie des Interactions Plasma-Surface (ChIPS), Research Institute for Materials Science and Engineering, University of Mons, Mons, Belgium
Landercy, Nicolas; Chimie des Interactions Plasma-Surface (ChIPS), Research Institute for Materials Science and Engineering, University of Mons, Mons, Belgium
Anaissi, Fauze J. ; Department of Chemistry, Universidade Estadual Do Centro-Oeste, UNICENTRO, Guarapuava, Brazil
Onderwater, Rob; Chimie des Interactions Plasma-Surface (ChIPS), Research Institute for Materials Science and Engineering, University of Mons, Mons, Belgium
Bittencourt, Carla ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface
Language :
English
Title :
Phytosynthesis of magnesium oxide particles from cassava byproducts for antibacterial applications
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Funders :
Araucaria Foundation Coordenação de Aperfeiçoamento de Pessoal de Nível Superior National Council for Scientific and Technological Development National Council for Scientific and Technological Development
Funding text :
Balaba appreciates Capes for a graduate scholarship. Anaissi is thankful for a CNPq Productivity grant (310815/2022-3) and the grants CNPq ( 427127 /2018-1). Anaissi and Bittencourt are thankful for a WBI/Confap-Funda\u00E7\u00E3o Arauc\u00E1ria (BEL2023081000001).
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