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Adsorption of Formin Acid Modified Clinoptilolite on *** o55

Adsorption of Formin Acid Modified Clinoptilolite on *** O55

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中国畜牧兽医学会动物营养学分会第十一次全国动物营养学术研讨会

作者： Q.Wu Y.Zhou Y.Wu L.Zhang T.Wang~* (College of Animal Science and Technology,Nanjing Agricultural University,Nanjing 210095,China)

Natural clinoptilolite is a natural,the shelf containing aluminum silicate non-metallic minerals that has monoclinic crystal structure symmetry,strong adsorptive,high ion exchange capacity and high speci ? c surface area,have been widely used as a ***,the hydrophilic surfaces of parent clinoptilolites are less effective in adsorbing bacteria and *** modification of clinoptilolites with organic cations,results in an increased hydrophobicity of the mineral surface providing a high affinity for bacteria *** acid,an organic acidifier,has a dicky causticity and the antibacterial mechanism,which has been overused as a feed additive(acidifer) in the farming *** purpose of this study is to prepare formic acid-modified clinoptilolite by cation exchange and to evaluate its absorption properties on escherichia coli o under ambient conditions,in *** of clay concentration,ionic concentration,lysine concentration,and time as well as bacterial suspensions concentration on *** o adsorption was also *** results show that(1) The amount of adsorption of *** o from solution to clay minerals were significantly increased with parent clinoptilolite and acid-modified clinoptilolite content increasing.(2) The adsorption processes occurring on each of the tested adsorbents reached equilibrium at 25 mg/ml clay *** discrepancy may result from the different amounts of parent clinoptilolite and acid-modified clinoptilolite added,which were between 30 to 50 mg/ml clay mineral in this study.(3 ) Ionic strength has an importmant influence on bacteria-clay mineral interaction. The amounts of *** o adsorbed on the tested adsorbents were increased with increased concentration of NaCl and CaCl in *** data determined from the adsorption ratio showed that Ca has higher influence than that Na.(4) The adsorption processes of *** o occurring on each of the tested adsorbents reached equilibrium after 2 *** the

关键词： e.coli o55 Clinoptilolite modified Formic acid adsorption

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