The Micro-structure Variation Of Modified Clay And Its Absorption Evaluation To Mycotoxins

The research involved modifing the clays of samples B and C with different organic materials respectively, evaluating the binding of mycotoxins to select the optimal modified clay and identifying the micro-structure variation of it.Project one focused on screening of clay minerals. The cation exchange capacity of 7 samples of bentonite and 6 samples of zeolite were tested. The results were given,49.8 meq/100g,97 meq/100g,40 meq/100g,58 meq/100g,80 meq/100g,4.5 meq/100g,180 meq/100g and 105 meq/100g,88 meq/100g,90 meq/100g,28.7 meq/100g,150 meq/100g, 78 meq/100g. The selected clays were dependent upon CEC which were the highest in all samples of bentonite or zeolite and they were named B and C.Project two involved modifing the clays with 3 kinds of organic materials M,G and C and evaluating their affinity of AFB1 and ZEN.The abtained products were used for in vitro adsorption studies of AFB1 and ZEN. The results demonstrated that the adsorbents which were modified with lower concentration organic modifiers had poor affinity to aflatoxin B1 and zearalenone. The products of BM02,BGo2 and BGioo wre adopted in the following tests. The adsorption of AFB1 and ZEN by the products were 54.71%,60.26%,,81.22% and 0.49%,6.83%,91.37%.In project three the product of BC100 was scanned through the electron microscope and infrared spectrometer. The products of BM02 and BG02 were scanned through X-ray powder diffraction. The results indicated that the basal frame of BC100 is not changed and had more functional groups.