Adsorption kinetics and equilibrium of copper from ethanol fuel on silica-gel functionalized with amino-terminated dendrimer-like polyamidoamine polymers
Adsorption kinetics and equilibrium of copper from ethanol fuel on silica-gel functionalized with amino-terminated dendrimer-like polyamidoamine polymers
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氨基封端树枝状聚酰胺胺聚合物功能化硅胶上乙醇燃料中铜的吸附动力学和平衡
DOI：
10.1016/j.fuel.2011.07.040
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发表时间：
2012-02
期刊：
影响因子：
7.4
通讯作者：
Yin, Ping
中科院分区：
文献类型：
--
作者：
Qu, Rongjun;Sun, Changmei;Ma, Fang;Cui, Zhenzhong;Zhang, Ying;Sun, Xiaoying;Ji, Chunnuan;Wang, Chunhua;Yin, Ping
采用间歇法研究了端氨基树枝状聚酰胺胺(PAMAM)聚合物SiO2-G1.0、SiO2-G2.0和SiO2-G3.0功能化硅胶对乙醇燃料中Cu2+的吸附动力学和平衡。结果表明，三种吸附剂的吸附均符合伪二阶模型。吸附等温线采用 Langmuir 模型、Freundlich 模型和 Dubinin–Radushkevich (D–R) 模型进行拟合。结果表明，Langmuir模型比Freundlich模型更适合描述平衡数据。根据D-R等温线模型，计算出三种吸附剂的平均自由能E，表明吸附是通过物理过程发生的。热力学参数ΔG0、ΔH0和ΔS0表明Cu2+吸附是吸热且自发的，固溶体界面的随机性降低，导致其在较高温度下具有较高的吸附容量。详细研究了硅胶上负载的PAMAM聚合物的代数、接触时间、初始浓度和温度对吸附能力的影响。此外，还推测了乙醇燃料中铜的吸附机理。
The adsorption kinetics and equilibrium of silica-gel functionalized with amino-terminated dendrimer-like polyamidoamine (PAMAM) polymers SiO2-G1.0, SiO2-G2.0 and SiO2-G3.0 for Cu2+in ethanol fuel were investigated by using batch method. The results indicated that the all the adsorptions of the three adsorbents followed well the pseudo second-order model. The adsorption isotherms were fitted by Langmuir model, Freundlich model and Dubinin–Radushkevich (D–R) model. The results showed that Langmuir model was more suitable to describe the equilibrium data than the Freundlich model. From the D–R isotherm model, the mean free energy E calculated of the three adsorbents showed that the adsorptions were taken place by physical processes. Thermodynamic parameters, ΔG0, ΔH0and ΔS0indicated the Cu2+adsorption to be endothermic and spontaneous with decreased randomness at the solid-solution interface, resulting in their higher adsorption capacities at higher temperature. The effect of generation number of PAMAM polymers loaded on silica-gel, contact time, initial concentration and temperatures on the adsorption capabilities were studied in detail. Moreover, the adsorption mechanism of copper from ethanol fuel was also presumed.
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影响因子：
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通讯作者：
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影响因子：
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