Adsorpcioni efekti mineralnih adsorbenata, III deo - ispitivanje u prisustvu vitamina B6 i mikroelemenata

Abstract

U ovom radu je ispitana in vitro adsorpcija vitamina B6 i mikroelemenata (Cu, Zn, Mn i Co) na mineralnim adsorbentima na bazi zeolita i bentonita. Mineralni adsorbenti na bazi zeolita su pokazali mali indeks vezivanja vitamina B6 (od 5% za uzorak 2 do 22% za uzorak 3). Zapaženo je da indeks adsorpcije vitamina B6 raste sa opadanjem stepena kristaliniteta zeolitskih uzoraka kao i sa porastom sadržaja bentonita u uzorcima. Tako, indeks adsorpcije vitamina B6 za uzorak 3 (zeolit sa 30% bentonita) iznosi 22% dok za HSCAS (adsorbent na bazi bentonita) ovaj indeks iznosi 98%. ispitivanja in vitro adsorpcije mikroelemenata su pokazala da se Cu, Zn, Mn i Co slabije adsorbuju na adsorbentu na bazi zeolita. Pri istim uslovima mineralni adsorbenti na bazi bentonita značajno adsorbuju ispitivane mikroelemente.

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 Ca=5% for sample 2 to Ca-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)-Ca=98%. The investigation of microelement adsorption in vitro, at pH 3.5 and 5, by zeolite and bentonite showed that Cu, In, 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.