| 钠基膨润土吸附亚甲基蓝热力学与动力学研究 |
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| 引用本文： | 任建敏,张永民,吴四维,丁社光,高培培. 钠基膨润土吸附亚甲基蓝热力学与动力学研究[J]. 离子交换与吸附, 2010, 26(2) |
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| 作者姓名： | 任建敏 张永民 吴四维 丁社光 高培培 |
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| 作者单位： | 重庆工商大学环境与生物工程学院,重庆,400067 |
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| 摘 要： | 利用钠基膨润土吸附亚甲基蓝水溶液,探讨了不同参数如接触时间、初始pH值、温度等对其吸附性能的影响。结果表明,室温下,pH10,钠基膨润土吸附60min,其吸附量达198.71mg/g,且吸附量随温度的升高而增大。通过计算不同温度下的热力学参数?G,?H和?S,证实该吸附为一自发的吸热过程。其等温吸附平衡更符合Langmuir模型;吸附动力学更适合准二级反应方程。
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| 关 键 词： | 钠基膨润土 亚甲基蓝 动力学 热力学 吸附等温线 |
THERMODYNAMICS AND KINETICS OF ADSORPTION OF METHYLENE BLUE BY Na-BENTONITE |
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| REN Jianmin,ZHANG Yongmin,WU Siwei,DING Sheguang,GAO Peipei. THERMODYNAMICS AND KINETICS OF ADSORPTION OF METHYLENE BLUE BY Na-BENTONITE[J]. Ion Exchange and Adsorption, 2010, 26(2) |
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| Authors: | REN Jianmin ZHANG Yongmin WU Siwei DING Sheguang GAO Peipei |
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| Abstract: | Na-bentonite was used as an adsorbent to adsorb methylene blue from aqueous solution at various contact time, initial pH and temperature. The results showed that the adsorption capacity of Na-bentonite was 198.71mg/g at the room temperature, with the conditions of initial pH 10, the reaction time is 60min, and it increased with increasing temperature. The calculated values of ?G, ?H and ?S at different temperatures indicate that the adsorbing is a spontaneous and endothermic process. Based on the experiment... |
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| Keywords: | Na-bentonite Methylene blue Kinetics Thermodynamics Adsorption isotherm |
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