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Adsorption effects of mineral adsorbents; Part III: Adsorption behaviour in the presence of vitamin B6 and microelements



Adsorption effects of mineral adsorbents; Part III: Adsorption behaviour in the presence of vitamin B6 and microelements



Acta Veterinaria (Belgrade) 50(1): 23-30



Mineral adsorbents based on natural zeolite and bentonite may be used in animal diets in order to prevent poisoning caused by mycotoxins. In this paper vitamin B6 and microelement adsorption by six different samples of mineral adsorbents was considered. The results indicated that mineral adsorbents based on natural zeolite had a low efficiency to bind vitamin B6 in vitro (from Calpha=5% for sample 2 to Calpha=22% for sample 3). This process is dependent on crystallinity and the mineralogical composition of the zeolitic samples. On the contrary, vitamin B6 was tightly bound to the mineral adsorbent based on bentonite (HSCAS)-Calpha=98%. The investigation of microelement adsorption in vitro, at pH 3.5 and 5, by zeolite and bentonite showed that Cu, Zn, Co and Mn were bound less tightly to zeolite than to bentonite. The obtained data suggest that bentonite material would reduce micronutrient availability more than zeolite.

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