摘要
采用啤酒酵母自制生物吸附剂,进行重金属离子镉的吸附研究。实验结果表明,啤酒酵母对Cd2+的吸附量随pH值的增加而增大。吸附的最佳pH范围是4～7,当pH=6时达到吸附最大值;随着初始Cd2+质量浓度增加,吸附量有所提高;当溶液初始Cd2+质量浓度为50m/L,pH6时达到实验条件下的最大吸附量为51.5mgCd2+/g干酵母;啤酒酵母经碱处理后吸附量增大。设计一个L9(33)正交实验,确定pH为反应过程中的显著因素;确定啤酒酵母对Cd2+的吸附过程遵循Langmuir方程。
Biological absorbent was produced by bccr yeast and then used in the absorption of heavy-metal ion Cd. The experimental results suggested that the absorption quantity ofCd^2＋ increased with the rise of pH value and the best pH value range was between 4 to 7 （absorption quantity reached the highest as pH=6）. Besides, with the increase of initial concentration of Cd^2＋, the absorption quantity kept increasing （the maximum absorption quantity （51.5 mg Cd^2＋/g dry yeast） achieved as mass concentration of Cd^2＋ reached 50 m/L with pH value as 6）. Bccr yeast had the highest absorption capacity if treated by alkani. A L9（3^3）orthogonal test was set up to prove that pH was the significant factor during the reaction. The absorption process of Cd^2＋ by beer yeast foUowcd Langmuir equation.
出处
《酿酒科技》
北大核心
2006年第6期85-88,共4页
Liquor-Making Science & Technology
基金
抚顺市精细化工研发中心资助
关键词
综合利用
啤酒酵母
生物吸附
重金属
comprehensive utilization
beer yeast
biological absorption
heavy metal
