Alkan Mahir, Kalay Burcu, Doğan Mehmet, Demirbaş Ozkan
Balikesir University, Faculty of Science and Literature, Department of Chemistry, Cagis-Balikesir, Turkey.
J Hazard Mater. 2008 May 1;153(1-2):867-76. doi: 10.1016/j.jhazmat.2007.09.047. Epub 2007 Sep 16.
The removal of copper ions from aqueous solutions by kaolinite was investigated by using a batch-type method. Effects of factors such as pH, ionic strength, temperature, acid-activation and calcination on copper adsorption were investigated. The uptake of copper was determined from changes in concentration as measured by atomic absorption spectrometry. The extent of copper adsorption increased with increasing pH and temperature and with decreasing ionic strength, acid-activation and calcination temperature. The Langmuir and Freundlich adsorption models were used to determine the isotherm parameters associated with the adsorption process. The results provide support for the adsorption of copper ions onto kaolinite. Thermodynamic parameters indicated the endothermic nature of copper adsorption on kaolinite. The experimental results were applied a batch design. As a result, the kaolinite may be used for removal of copper ions from aqueous solutions.
采用间歇式方法研究了高岭土对水溶液中铜离子的去除效果。考察了pH值、离子强度、温度、酸活化和煅烧等因素对铜吸附的影响。通过原子吸收光谱法测量浓度变化来测定铜的吸附量。铜的吸附程度随pH值和温度的升高以及离子强度、酸活化和煅烧温度的降低而增加。采用Langmuir和Freundlich吸附模型确定与吸附过程相关的等温线参数。结果为铜离子在高岭土上的吸附提供了支持。热力学参数表明铜在高岭土上的吸附具有吸热性质。实验结果应用于间歇式设计。因此，高岭土可用于去除水溶液中的铜离子。
