Akar Tamer, Ozcan A Safa, Tunali Sibel, Ozcan Adnan
Department of Chemistry, Faculty of Arts and Science, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey.
Bioresour Technol. 2008 May;99(8):3057-65. doi: 10.1016/j.biortech.2007.06.029. Epub 2007 Aug 14.
Biosorption of Acid Blue 40 (AB40) onto cone biomass of Thuja orientalis was studied with variation in the parameters of pH, contact time, biosorbent and dye concentration and temperature to estimate the equilibrium, thermodynamic and kinetic parameters. The AB40 biosorption was fast and the equilibrium was attained within 50 min. Equilibrium data fitted well to the Langmuir isotherm model in the studied concentration range of AB40 and at various temperatures. Maximum biosorption capacity (q(max)) for AB40 was 2.05 x 10(-4)mol g(-1) or 97.06 mg g(-1) at 20 degrees C. The changes of Gibbs free energy, enthalpy and entropy of biosorption were also evaluated for the biosorption of AB40 onto T. orientalis. The results indicate that the biosorption was spontaneous and exothermic. Kinetics of biosorption of AB40 was analyzed and rate constants were also derived and the results show that the pseudo-second-order kinetic model agrees very well with the experimental data.
研究了侧柏球果生物质对酸性蓝40（AB40）的生物吸附作用，通过改变pH值、接触时间、生物吸附剂和染料浓度以及温度等参数，来估算平衡、热力学和动力学参数。AB40的生物吸附过程较快，50分钟内即可达到平衡。在所研究的AB40浓度范围和不同温度下，平衡数据与朗缪尔等温线模型拟合良好。在20℃时，AB40的最大生物吸附容量（q(max)）为2.05×10(-4)mol g(-1)或97.06 mg g(-1)。还评估了AB40在侧柏上生物吸附的吉布斯自由能、焓和熵的变化。结果表明，生物吸附是自发的且放热的。分析了AB40生物吸附的动力学，并推导了速率常数，结果表明准二级动力学模型与实验数据非常吻合。
