酵母对铜（II）的生物吸附
Biosorption Cu (II) by the yeast .
作者信息
do Nascimento Jéssica M, de Oliveira Jorge Diniz, Rizzo Andrea C L, Leite Selma G F
机构信息
Department of Biochemical Engineering, School of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, 21941-909, Brazil.
Centro de Ciências Exatas, Naturais e Tecnológicas, Universidade Estadual da Região Tocantina do Maranhão, Imperatriz, 65901-480, Brazil.
出版信息
Biotechnol Rep (Amst). 2019 Feb 14;21:e00315. doi: 10.1016/j.btre.2019.e00315. eCollection 2019 Mar.
With the industrial and population advances, the generation of effluents containing heavy metals has grown a lot. In this work, the commercial biomass of the yeast Saccharomyces cerevisiae Perlage BB were carried out as Cu (II) ion biosorbent. The influence of some variables such as metal concentration, pH range, equilibrium time and biomass concentration were evaluated. The biosorption capacity was measured by adsorption isotherms, with the Langmuir, Freundlich, and Dubinin-Radushkevich (D-R) models. The characterization of the biomass surface were investigated by Dispersive Energy X-Ray Fluorescence Spectrometry (EDX) and Atomic Force Microscopy (AFM). The results showed that the biomass presented good biosorption efficiency. The best fit of the data was obtained with the Langmuir model, detecting the maximum biosorption capacity of 4.73 mg g. By the methods used in the characterization of the biomass surface, it was possible to verify the presence of the Cu (II) ion in the yeast.
随着工业发展和人口增长，含重金属废水的产生量大幅增加。在本研究中，使用商业酵母酿酒酵母Perlage BB作为铜（II）离子生物吸附剂。评估了金属浓度、pH范围、平衡时间和生物量浓度等变量的影响。通过吸附等温线，采用朗缪尔、弗伦德利希和杜比宁-拉杜舍维奇（D-R）模型测量生物吸附容量。通过能量色散X射线荧光光谱法（EDX）和原子力显微镜（AFM）对生物质表面进行表征。结果表明，该生物质具有良好的生物吸附效率。数据与朗缪尔模型拟合最佳，检测到最大生物吸附容量为4.73 mg/g。通过用于生物质表面表征的方法，可以验证酵母中铜（II）离子的存在。
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