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首页> 外文期刊>Journal of Applied Polymer Science >Kinetics and equilibrium of cobalt ion adsorption on cross-linked polyethylenimine membrane
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Kinetics and equilibrium of cobalt ion adsorption on cross-linked polyethylenimine membrane

机译：交联聚乙烯亚胺膜上钴离子吸附的动力学和平衡

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The kinetics and equilibrium of cobalt ion adsorption on crosslinked polyethylenimine (PEI) membrane were studied by the spectroscopic method in terms of time, cobalt ion concentration, and temperature. It was found that the adsorption of cobalt ion on crosslinked PEI membrane obeyed the pseudofirst-order kinetic model and the equilibrium adsorption amount of cobalt ion on crosslinked PEI membrane was closely related to the initial cobalt ion concentration. The equilibrium adsorption amount increased with the decrease of temperature and obeyed a Langmuir isotherm to give the equilibrium constant for the adsorption of cobalt ion on crosslinked PEI membrane under various temperatures. Based on Van't Hoff equation the enthalpy and entropy of the adsorption of cobalt ion on crosslinked PEI membrane were determined to be -12.9 kJ mol(-1) and -107 J mol(-1) K-1, respectively. (c) 2007 Wiley Periodicals, Inc.
机译：通过光谱学方法研究了钴离子在交联聚乙烯亚胺（PEI）膜上吸附的动力学和平衡，包括时间，钴离子浓度和温度。发现交联的PEI膜上钴离子的吸附符合拟一级动力学模型，交联的PEI膜上钴离子的平衡吸附量与初始钴离子浓度密切相关。平衡吸附量随温度的降低而增加，并遵循Langmuir等温线，给出了在各种温度下交联PEI膜上钴离子吸附的平衡常数。根据Van't Hoff方程，确定交联PEI膜上钴离子吸附的焓和熵分别为-12.9 kJ mol（-1）和-107 J mol（-1）K-1。 （c）2007年Wiley Periodicals，Inc.

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