Banana peel: an effective biosorbent for aflatoxins

Autor:	Muhammad Iqbal Bhanger, Zahid Hussain Shar, G. A. Sumbal, Cindy Giles, Mary T. Fletcher, Syed Tufail Hussain Sherazi, Shafi Muhammad Nizamani
Rok vydání:	2016
Předmět:	Dietary Fiber Langmuir Aflatoxin B1 Health Toxicology and Mutagenesis Analytical chemistry Industrial Waste Food Contamination 010501 environmental sciences Toxicology 01 natural sciences Foodborne Diseases symbols.namesake Adsorption Aflatoxins Desorption Animals Freundlich equation Point of zero charge Food-Processing Industry 0105 earth and related environmental sciences Chemistry 010401 analytical chemistry Public Health Environmental and Occupational Health Biosorption Langmuir adsorption model Banana peel Musa General Chemistry General Medicine Hydrogen-Ion Concentration Animal Feed 0104 chemical sciences Absorption Physicochemical Fruit symbols Carcinogens Thermodynamics Queensland Food Science Nuclear chemistry
Zdroj:	Food additivescontaminants. Part A, Chemistry, analysis, control, exposurerisk assessment. 33(5)
ISSN:	1944-0057
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::beeea2dd6b6d6d9e369f1f7e776a9015 https://pubmed.ncbi.nlm.nih.gov/27052947 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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