Ozer Ayla, Akkaya Gönül, Turabik Meral
University of Mersin, Department of Chemical Engineering, 33343 Ciftlikköy, Mersin, Turkey.
J Hazard Mater. 2005 Nov 11;126(1-3):119-27. doi: 10.1016/j.jhazmat.2005.06.018. Epub 2005 Aug 9.
The biosorption of Acid Red 274 (AR 274) dye on Enteromorpha prolifera, a green algae grown on Mersin costs of the Mediterranean, Turkey, was studied as a function of initial pH, temperature, initial dye and biosorbent concentration. The experiments were conducted in a batch manner. The Langmuir and Freundlich isotherms were used for modelling the biosorption equilibrium. At optimum temperature 30 degrees C and initial pH 2.0-3.0, the Langmuir isotherm fits best to the experimental equilibrium data with a maximum monolayer coverage of 244 mg/g. The equilibrium AR 274 concentration of the exit stream of a single batch was also obtained by using the experimental equilibrium curve and operating line graphically. The pseudosecond-order kinetic model and Weber-Morris model were applied to the experimental data and it was found that both the surface adsorption as well as intraparticle diffusion contribute to the actual adsorption process. The biosorption process follows a pseudosecond-order kinetics and activation energy was determined as -4.85 kJ/mol. Thermodynamic studies showed that the biosorption of AR 274 on E. prolifera is exothermic and spontaneous in nature.
研究了生长于土耳其地中海沿岸梅尔辛市的绿藻浒苔对酸性红274（AR 274）染料的生物吸附作用，该作用是初始pH值、温度、初始染料浓度和生物吸附剂浓度的函数。实验采用分批方式进行。使用朗缪尔等温线和弗罗因德利希等温线对生物吸附平衡进行建模。在最佳温度30℃和初始pH值2.0 - 3.0条件下，朗缪尔等温线最符合实验平衡数据，最大单层覆盖率为244 mg/g。还通过实验平衡曲线和操作线图以图形方式获得了单批出料流中AR 274的平衡浓度。将伪二级动力学模型和韦伯 - 莫里斯模型应用于实验数据，发现表面吸附和颗粒内扩散均对实际吸附过程有贡献。生物吸附过程遵循伪二级动力学，活化能测定为 -4.85 kJ/mol。热力学研究表明，浒苔对AR 274的生物吸附本质上是放热且自发的。
