Modification Of Nano Silicate And Its Effects On Adsorbing Zearalenone,Vitamins And Minerals

Modified materials were prepared using nano silicate particles from Feed ScienceInstitute of Zhejiang University. Pillaring agent solutions were prepared by adding CTT(2mg) into nano silicate solution (200ml) with stirring.The structures and characteristics of modified silicate particles were investigatedcompared to raw material by XRD, SME, AFM and FTIR methods in this paper. FTIRspectrograms suggested that the organic reagents (CTT) were intercalated into the layers ofsilicate particles. The spacing of the layers were obviously increased by XRD, d (001)increasing from 14.9678 to 15.8684. It was also observed that hydrophobic was greatlyimproved by SEM. AFM of silicate particles suggested silicate particles after or beforemodified were nano sizes.The influence of shaking time: In the condition of concentration 5ug/ml,pH5.6, 37℃,120r/min shaking, ZEA.Modified silicate particles adsorbing ZEA reached balance of5.31mg/g in 30min, raw silicate particles still fluctuated after 90min.The influence of amount of material: As amount of material increased, amount ofZEA adsorbed was increased. When modified material was 100mg, the adsorption processarrived to balance; raw material was difficult in reaching balance.The influence of pH: At pH10 modified silicate particles by water reached 8.4mg/g,at pH1 only was 4mg/g; At pH1 and pH10,modified silicate particles by ethanol maximumadsorption amount was 7.2mg/g and 7.5mg/g, respectively; The control group at pH10maximum adsorption amount was 1.29mg/g. the quantity of adsorption in the acidiccondition was higher than that in the alkaline condition. The influence of temperature: Under 10℃,20℃,30℃,40℃,50℃,60℃sixconditions: when temperature was 60℃, modified silicate particles by water maximumadsorption amount was 6.2 mg/g,modified silicate particles by ethanol maximum adsorptionamount was5.36 mg/g,, the control was 1.29mg/g in 50℃.The influence of shaking velocity: Modified group by water, at 200r/min reached themaximum adsorption amount 6.37mg/g, by ethanol at 300r/min reached the maximumadsorption amount 5.43mg/g; control group at 350r/min reached the maximum adsorptionamount 1.38mg/g.The desorption rate of test: At pH7 modified silicate particles the maximum desorptionamount was 5.8%; the control group was 26%. Modified silicate particles -ZEA was morestable.The adsorption law of silicate particles and modified silicate particles for ZEA withNa⁺,K⁺,Ca²⁺,Fe³⁺,lysine were studied. These substances did not affect modified silicateparticles adsorbing ZEA. This test indicated that modified group could adsorb ZEAselectivity.The adsorption amount increased with the concentration of ZEA increasing. Therewas a linear correlation between the adsorption amount and the concentration of ZEA.The adsorption to ZEA by silicate particles is accordance to the Langmuir. formula,Cr/Ca=(Cr/K₁)+(1/K₁K₂); There was a linear correlation at modified group by water:y=0.7839x-0.3625, R²=0.9902, the maximum adsorption amount was 7.4665mg/g;modified group by ethanol: y=0.7318x-0.3899, R²=0.9830, the maximum adsorptionamount was 6.928mg/g;control group: y=0.0456x+0.1024, R²=0.9567, the maximumadsorption amount was 0.5584mg/g.And study effects of adsorbing B₂,C,VA,VE: The results showed that in 90min,1.0mg/kg,pH7.0,120r/min shaking conditions, the removal rates of VA,VB2,VE werenot obvious (P＞0.05).Compared to control group, raw material groups decreased 5.73%,12.72%,7.94%and 7.85%, respectively (P＜0.05); modified silicate groups decreased0.82%,0.04%,0.02%(P＞0.05), VC was 7.06%(P＜0.05).Study adsorbing VA,VE using methanol solvent: Compared to control groups, raw groups decreased 6.87% and 7.13%, (P＜0.05) respectively; modified groups decreased0.07% and 0.36%, respectively, (P＞0.05).Study the pH influence of adsorbing B₂,C,VA,VE: At pH5 and pH11, the amountof adsorbing B₂,C,VA,VE were litter, but at pH3 and pH9 were more.And study effects of adsorbing Na⁺,K⁺,Ca²⁺,Fe³⁺,Fe²⁺,Cu²⁺,Mg²⁺. The resultsshowed in 90min, 1.0mg/kg, pH 7.0,120r/min shaking conditions, the removal rate of Na⁺,K⁺,Ca²⁺,Fe³⁺,Fe²⁺,Cu²⁺,Mg²⁺ were not obvious in modified solution (P＞0.05).These findings suggested that organic nano silicate particle as a new nano-adsorbentof zearalenone, had promising prospects.