啤酒废酵母对Pb2 +的吸附

辽宁石油化工大学学报 ›› 2006, Vol. 26 ›› Issue (1): 26-29.

啤酒废酵母对Pb^{2 +}的吸附

王战勇, 张　晶, 苏婷婷

辽宁石油化工大学环境与生物工程学院, 辽宁抚顺113001

收稿日期:2005-11-01 出版日期:2006-01-25 发布日期:2006-01-25
作者简介:王战勇(1978 -), 男, 辽宁抚顺市, 讲师, 在读硕士

Adsorption of Lead (Ⅱ)by Discarded Brewer' s Yeast

School of Environmental and Biological Engineering , Liaoning University of Petroleum & Chemical Technology ,
Fushun Liaoning 113001, P .R .China

Received:2005-11-01 Published:2006-01-25 Online:2006-01-25

摘要/Abstract

摘要： 　为了开发新型生物吸附剂, 研究了啤酒废酵母对Pb^{2 +}的生物吸附能力。初步确定了啤酒废酵母对Pb^{2 +}的最佳吸附条件, 起始pH 为5, Pb^{2 +}的起始质量浓度为50 mg/ L, 酵母的质量浓度为1 g/ L, 吸附温度为30 ℃,吸附时间为60 min , 在此条件下啤酒废酵母对Pb^{2 +}的吸附率可达93.50 %。对吸附了Pb^{2 +}的啤酒废酵母进行解吸实验, 表明浓度为1 mol/ L 的HCl 为较好的解吸剂, 其解吸率可达54.59 %。通过计算分析表明, 啤酒废酵母对Pb^{2 +}的吸附符合Langmuir 吸附模型和Freundlich 吸附模型, 且符合Langmuir 吸附模型的程度更优。最后对未吸附Pb^{2 +}的空白酵母和吸附Pb^{2 +}的酵母进行了红外光谱分析, 比较了啤酒废酵母吸附Pb^{2 +}前后的变化。

关键词: 啤酒废酵母, 　生物吸附, 　Pb^{2 +}, 红外光谱

Abstract:

The biosorption action of lead(Ⅱ)by beer discarded brewer' s yeast w as studied for exploiting new types of biosorbent . The optimal adsorption conditions of lead(Ⅱ)by discarded brew er' 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 1g/ 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)w as performed.I t shows that the preferable desorbent is HCl (concentration is 1mol/ 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(I I)-biosorption yeast were studied by infrared spectra analysis, and the difference of which was compared .

Key words: 　Discarded brewer' s yeast , 　Biosorption , 　Lead (Ⅱ), 　Infrared spectra

王战勇, 张　晶, 苏婷婷. 啤酒废酵母对Pb^{2 +}的吸附[J]. 辽宁石油化工大学学报, 2006, 26(1): 26-29.

WANG Zhan -yong,ZHANG Jing,SU Ting -ting. Adsorption of Lead (Ⅱ)by Discarded Brewer' s Yeast[J]. Journal of Liaoning Petrochemical University, 2006, 26(1): 26-29.