Thermogravimetric Analysis of Modified Montmorillonite Clay for Mycotoxin Decontamination in Cereal Grains.

Autor: Olopade BK; Department of Biological Sciences, College of Science and Technology, Covenant University, Km 10, Idiroko Road, Ota, Ogun, Nigeria.; Department of Biotechnology and Food Technology, University of Johannesburg, Doornfontein Campus, Johannesburg, Gauteng 2028, South Africa., Nwinyi OC; Department of Biological Sciences, College of Science and Technology, Covenant University, Km 10, Idiroko Road, Ota, Ogun, Nigeria.; Department of Biotechnology and Food Technology, University of Johannesburg, Doornfontein Campus, Johannesburg, Gauteng 2028, South Africa., Adekoya JA; Department of Chemistry, College of Science and Technology, Covenant University, Km 10, Idiroko Road, Ota, Ogun, Nigeria., Lawal IA; Vaal University of Technology, Vanderbijlpark Campus, Boulevard, Vanderbijlpark 1900, South Africa., Abiodun OA; Department of Biological Oceanography, Nigerian Institute for Oceanography and Marine Research, Victoria Island, Lagos 101241, Nigeria., Oranusi SU; Department of Biological Sciences, College of Science and Technology, Covenant University, Km 10, Idiroko Road, Ota, Ogun, Nigeria., Njobeh PB; Department of Biotechnology and Food Technology, University of Johannesburg, Doornfontein Campus, Johannesburg, Gauteng 2028, South Africa.
Jazyk: angličtina
Zdroj: TheScientificWorldJournal [ScientificWorldJournal] 2020 Nov 28; Vol. 2020, pp. 6943514. Date of Electronic Publication: 2020 Nov 28 (Print Publication: 2020).
DOI: 10.1155/2020/6943514
Abstrakt: Thermogravimetric analysis (TGA) was carried out to study the stability of nanoformulations used for the decontamination of mycotoxins. The TGA patterns of the nanoformulations from montmorillonite clay and Cymbopogon citratus (lemongrass) extracts were assessed with temperature ranging from ambient (20°C) to 1000°C. The various nanoformulations studied included unmodified montmorillonite clay (Mont), montmorillonite washed with sodium chloride (Mont-Na), montmorillonite mixed with lemongrass essential oil (Mont-LGEO), and montmorillonite mixed with an equal quantity of lemongrass powder (Mont-LGP). There was no significant difference in the median of the various nanoformulations within 4 weeks at p < 0.05 using the Kruskal-Wallis nonparametric test. For the TGA, the first degradation for montmorillonite clay and the nanoformulations occurred at a temperature between 80 and 101°C and was attributed to the loss of lattice water outside the coordination sphere with a range of 3.5-6.5% weight loss. The second degradation occurred within the temperature of 338 to 344°C, and the third, at a temperature between 640 and 668°C for Mont and the formulations of Mont-Na, Mont-LGEO, and Mont-LGP. There were strong similarities in the degradation patterns of Mont and Mont-Na with the minimum difference being the relatively higher weight loss of the sodium-exchanged cation for Mont-Na at the third degradation step. Hence, the order of stability from the most resistant to the least resistant to degradation is as follows: Mont-LGEO ≥ Mont-Na ≥ Mont ≥ Mont-LGP.
Competing Interests: The authors declare that there are no conflicts of interest regarding the publication of this paper.
(Copyright © 2020 Bunmi K. Olopade et al.)
Databáze: MEDLINE
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