Employing calcined and non-calcined aluminum-magnesium layered double hydroxides for detoxification of solution and nonalcoholic beer from aflatoxins B1 and G1

Detoxification of solution and beer from aflatoxins B1 and G1 using layered double hydroxides is the focus of this study. The aluminum-magnesium layered double hydroxide (Al-Mg LDH) is selected in its calcined and non-calcined forms to evaluate the influence of calcination on detoxification. They were produced using the co-precipitation method and used in contaminated solutions and beer. Characteristics of the adopted adsorbents were studied by XRD, FTIR and SEM methods. Effects of quantity of the adsorbents, exposure time, and initial content of aflatoxin were investigated. Moreover, effects of the adsorbents on the properties of beer were studied. The non-calcined form of Al-Mg LDH was not able to adsorb aflatoxins B1 and G1 considerably. On the opposite, its calcined form exhibited more than 90% adsorption just in less than one hour in solutions and in less than 4 hours in the beer samples. The reason is pointed to the fact that calcination of Al-Mg LDH considerably enhanced characteristics of the adsorbent. It almost doubled surface area of the material, increased its total pore volume over 54%, and added to its pore size over 35%.