Banana peel: an effective biosorbent for mycotoxins

Shar, Zahid Hussain, Fletcher, Mary T., Sumbal, Gul Amer, Sherazi, Syed Tufail Hussain, Giles, Cindy, Bhanger, Muhammad Iqbal and Nizamani, Shafi Muhammad (2016) Banana peel: an effective biosorbent for mycotoxins. Food Additives and Contaminants: Part A, 33 5: 849-860. doi:10.1080/19440049.2016.1175155

Author Shar, Zahid Hussain
Fletcher, Mary T.
Sumbal, Gul Amer
Sherazi, Syed Tufail Hussain
Giles, Cindy
Bhanger, Muhammad Iqbal
Nizamani, Shafi Muhammad
Title Banana peel: an effective biosorbent for mycotoxins
Journal name Food Additives and Contaminants: Part A   Check publisher's open access policy
ISSN 1944-0057
Publication date 2016-05-03
Sub-type Article (original research)
DOI 10.1080/19440049.2016.1175155
Open Access Status Not Open Access
Volume 33
Issue 5
Start page 849
End page 860
Total pages 12
Place of publication Abingdon, Oxfordshire, United Kingdom
Publisher Taylor & Francis
Collection year 2017
Language eng
Formatted abstract
This work reports the application of banana peel as a novel bioadsorbent for in vitro removal of five mycotoxins (aflatoxins (AFB1, AFB2, AFG1, AFG2) and ochratoxin A). The effect of operational parameters including initial pH, adsorbent dose, contact time and temperature were studied in batch adsorption experiments. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and point of zero charge (pHpzc) analysis were used to characterise the adsorbent material. Aflatoxins’ adsorption equilibrium was achieved in 15 min, with highest adsorption at alkaline pH (6–8), while ochratoxin has not shown any significant adsorption due to surface charge repulsion. The experimental equilibrium data were tested by Langmuir, Freundlich and Hill isotherms. The Langmuir isotherm was found to be the best fitted model for aflatoxins, and the maximum monolayer coverage (Q0) was determined to be 8.4, 9.5, 0.4 and 1.1 ng mg−1 for AFB1, AFB2, AFG1 and AFG2 respectively. Thermodynamic parameters including changes in free energy (ΔG), enthalpy (ΔH) and entropy (ΔS) were determined for the four aflatoxins. Free energy change and enthalpy change demonstrated that the adsorption process was exothermic and spontaneous. Adsorption and desorption study at different pH further demonstrated that the sorption of toxins was strong enough to sustain pH changes that would be experienced in the gastrointestinal tract. This study suggests that biosorption of aflatoxins by dried banana peel may be an effective low-cost decontamination method for incorporation in animal feed diets.
Keyword Aflatoxin
Banana peel
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Queensland Alliance for Agriculture and Food Innovation
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Created: Sun, 01 May 2016, 15:45:59 EST by Dr Mary Fletcher on behalf of School of Chemistry & Molecular Biosciences