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《Journal of Liaoning University of Petroleum & Chemical Technology》 2006-01
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Adsorption of Lead(Ⅱ) by Discarded Brewer's Yeast

WANG Zhan-yong,ZHANG Jing,SU Ting-ting(School of Environmental and Biological Engineering,Liaoning University of Petroleum & Chemical Technology,Fushun Liaoning 113001,P.R.China)  
The biosorption action of lead(Ⅱ) by beer discarded brewer's yeast was studied for exploiting new types of biosorbent.The optimal adsorption conditions of lead(Ⅱ) by discarded brewer's yeast were determined at first.Initial pH value is 5,initial mass concentration of lead(Ⅱ) is 50 mg/L,the mass concentration of yeast is 1 g/L,adsorption temperature is 30 ℃,and adsorption time is 60 minutes.Under the above conditions,the adsorption rate of lead(Ⅱ) by discarded brewer's yeast can reach to 93.50%.The desorptive experiment of discarded brewer's yeast adsorbed lead(Ⅱ) was performed.It shows that the preferable desorbent is HCl(concentration is 1 mol/L),the desorption rate of which reaches to 54.59%.According to calculation,it is demonstrated the adsorption lead(II) process of discarded brewer's yeast is in accordance with both Langmuir and Freundlich adsorption model,and better complied with Langmuir adsorption model.The blank and lead(II)-biosorption yeast were studied by infrared spectra analysis,and the difference of which was compared.
【CateGory Index】: X172
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