粉煤灰沸石吸附铜离子的试验研究

摘要

The adsorption of Copper ion with NaA zeolite is studied in this paper. The key conditions influencing the adsorption efficiencies include pH, temperature, adsorption time and initial concentration. The results show that the optimum pH is 5.5. The dynamics study demonstrates that the adsorption of Copper ions will achieve balance in about 100 min and better follows the second order kinetics model. The thermodynamics study shows that the optimal temperature is 45℃ and better follows the Langmuir isotherm. The adsorption quantity increase with rise of initial concentration. The maximum adsorption capacity was 44. 776 mg/g under the optimum conditions.%文章主要对粉煤灰沸石吸附水溶液中的铜离子进行了研究。通过试验考察了pH、温度、吸附时间、离子初始浓度等主要条件对吸附效率的影响。试验结果表明：NaA型沸石吸附铜离子的最佳pH 5;动力学研究表明,铜离子在100 min可以达到吸附平衡,而且更好地遵循二级动力学模型;热力学研究表明,45℃时吸附铜离子的效果最好,而且更好地遵循Langmuir等温式;随着离子初始浓度的增加,吸附量也相应增加。最佳条件下最大吸附量44.776 mg/g。