| 固定化啤酒酵母对锶离子的吸附 |
| |
| 引用本文： | 杨玉山,董发勤,罗顺忠,张伟.固定化啤酒酵母对锶离子的吸附[J].化工进展,2012,31(3):639-642. |
| |
| 作者姓名： | 杨玉山 董发勤 罗顺忠 张伟 |
| |
| 作者单位： | 1. 西南科技大学核废物与环境安全国防重点学科实验室,四川绵阳,621010
2. 中国工程物理研究院核物理与化学研究所,四川绵阳,621900 |
| |
| 基金项目： | 国家自然科学基金，核废物与环境安全国防重点学科实验室基金 |
| |
| 摘 要： | 用2%海藻酸钠(SA),4%氯化钙(CaCl2)包埋法制备了固定啤酒废酵母。考察了菌体含量对固定化菌体强度的影响,研究了pH值、温度、Sr2+初始浓度、吸附时间等外界因素对固定化啤酒酵母吸附溶液中Sr2+的影响。结果表明:菌体含量为10%时,制备的固定化菌体具有较好的机械强度。固定化啤酒废酵母对Sr2+最佳吸附条件为:pH=4.5,温度30℃,Sr2+起始浓度50 mg/L,吸附时间4 h。Sr2+浓度在10～150 mg/L范围内,固定化啤酒废酵母对Sr2+的吸附符合Langmuir模型和Freundlich模型,但符合Freundlich模型的程度更优。
|
| 关 键 词： | 啤酒酵母菌 固定化 Sr2+ 生物吸附 |
Biosorption of Sr2+ by immobilized Saccharomyces cerevisiae |
| |
| YANG Yushan,DONG Faqin,LUO Shunzhong,ZHANG Wei.Biosorption of Sr2+ by immobilized Saccharomyces cerevisiae[J].Chemical Industry and Engineering Progress,2012,31(3):639-642. |
| |
| Authors: | YANG Yushan DONG Faqin LUO Shunzhong ZHANG Wei |
| |
| Affiliation: | 1(1Key Laboratory of Defensive Discipline on Nuclear Wastes and Environmental Safety,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;2Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics,Mianyang 621900,Sichuan,China) |
| |
| Abstract: | Saccharomyces cerevisiae was entrapped in a mixture of 2% SA,and 4% CaCl2.The mechanical strength of SA-CaCl2 immobilized beads,and the effects of adsorption treatment conditions,such as pH,temperature,Sr2+ initial concentration and reaction time,on the adsorptive capacity were investigated.The results show that the mechanical strength of immobilized Saccharomyces cerevisiae is higher at 10% Saccharomyces cerevisiae,the optimal adsorption condition for immobilized Saccharomyces cerevisiae is as follows:pH 4.5,temperature 30 ℃,Sr2+ initial concentration 50 mg/L,adsorption time 4 h.The sorption process of Sr2+ is in accordance with both Langmuir and Freundlich isotherm when the concentration of Sr2+ is 10-150 mg/L,but complies with Freundlich model better. |
| |
| Keywords: | Saccharomyces cerevisiae immobilized cell Sr2＋ biosorption |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
