摘要
为了用生物吸附法去除废水中铜离子,实验了用工业废弃酿酒酵母吸附Cu2+离子的生物吸附特性。结果表明:酵母吸附Cu2+的吸附平衡时间为3h,最佳条件为初始pH 4~5之间,温度20~30℃。在初始质量浓度为5.0~63.5mg/L,Cu2+去除率达到56%~22%。Langmuir方程比Freundlich方程更好地描述酵母对Cu2+平衡吸附行为。啤酒酵母吸附Cu2+为自发过程。利用废弃啤酒酵母去除废水中Cu2+是可行的。
The copper ion biosorption characteristics by waste biomass of Saccharomyces cerevisiae were studied experimentally to remove copper ions from aqueous solutions. The results show that the optimum conditions are an initial pH of 4 - 5, adsorption time of 3 h, and temperature of 20 - 30℃. When copper ion initial concentration is 5.0- 63. 5 mg·L^-1, the removal efficiency is 56% - 22%. Both the Langmuir model and the Freundlich model can describe the copper ion equilibrium data, with the Langmuir adsorption isotherm providing better agreement with the data. The results also show that Cu^2＋ biosorption by S. cerevisiae is spontaneous. Thus waste biomass of S. cerevisiae can be used to remove copper ions from aqueous solutions.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第12期2093-2095,共3页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(50278045)
清华大学基础研究基金资助项目(JC2002054)
关键词
废水处理
生物吸附
啤酒酵母
重金属
CU^2+
wastewater treatment
biosorption
Saccharomyces cerevisiae
heavy metal
copper ions
