کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4651 | 236 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Kinetics modelling of biosorption by algal biomass from binary metal solutions using batch contactors Kinetics modelling of biosorption by algal biomass from binary metal solutions using batch contactors](/preview/png/4651.png)
The biosorption from four binary metal solutions, Pb2+/Cu2+, Pb2+/Cd2+, Pb2+/Zn2+ and Cd2+/Zn2+, onto algae Gelidium, algal waste and composite material, at pH 5.3 and 20 °C, were studied in batch adsorber. A mass transfer model based on a one-dimensional intraparticle diffusion rate, combined with a binary Langmuir isotherm, was applied to describe the overall biosorption rate of binary metal solutions mixture in flat seaweed biomass. A good correlation has been found between mass transfer model and experimental data for all systems. Model equations were solved numerically yielding the metal ions homogeneous diffusion coefficients. The biosorbents showed a preference for sorbing Pb over Cd, Zn and Cu even for low lead initial concentrations. Cu and Pb show a similar competition for the binding sites, although a higher uptake was found for copper ions, due to the higher initial copper concentration.
Journal: Biochemical Engineering Journal - Volume 38, Issue 3, 15 March 2008, Pages 319–325