Comparative study of the biosorption of Pb(II), Ni(II) and Cr(VI) ions onto S. cerevisiae: determination of biosorption heats.
Comparative study of the biosorption of Pb(II), Ni(II) and Cr(VI) ions onto S. cerevisiae: determination of biosorption heats.
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DOI：
10.1016/s0304-3894(03)00109-2
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发表时间：
2003
影响因子：
13.6
通讯作者：
A. Ozer;D. Ozer
中科院分区：
文献类型：
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作者：
A. Ozer;D. Ozer
在这项研究中，Pb（II），Ni（II）和Cr（VI）离子到非活性酿酒酵母的生物吸附作为初始pH值，初始金属离子浓度和温度的函数进行了研究。将Langmuir模型应用于Pb（II）、Ni（II）和Cr（VI）生物吸附的实验平衡数据，发现在25°C的最佳生物吸附温度下的最大金属离子吸收量分别为270.3、46.3和32.6mgg−1。利用不同温度下的朗缪尔常数B值，测得Pb（II）、Ni（II）和Cr（VI）的生物吸附热分别为−1.125、−1.912和− 2.89 kcalmol −1。结果表明，S.啤酒是通过物理吸附，并具有放热性质。
In this study, the biosorption of Pb(II), Ni(II) and Cr(VI) ions onto inactive Saccharomyces cerevisiae was investigated as a function of initial pH, initial metal ion concentration and temperature. The Langmuir model was applied to experimental equilibrium data of Pb(II), Ni(II) and Cr(VI) biosorption depending on temperature and the maximum metal ions uptake at optimum biosorption temperature of 25°C, were found to be 270.3, 46.3 and 32.6mgg−1, respectively. Using the Langmuir constant, b values obtained at different temperatures, the biosorption heats of Pb(II), Ni(II) and Cr(VI) were determined as −1.125, −1.912 and −2.89kcalmol−1, respectively. The results indicated that the biosorption of Pb(II), Ni(II) and Cr(VI) ions to S. cerevisiae is by the physical adsorption and has an exothermic nature.