电解质溶液膜传输和内能转换的 Kedem-Katchalsky 转换方程的 L 版本。

Q3 Medicine Polimery w medycynie Pub Date : 2024-01-01 DOI:10.17219/pim/175949
Andrzej Ślęzak, Sławomir M Grzegorczyn
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引用次数: 0

摘要

背景:非平衡热力学的重要形式之一是 Peusner 网络热力学。通过描述膜过程中的能量转换,即系统内能转换为耗散能和用于与溶液组分传输相关的功的自由能,我们可以描述这些能量与作用在膜系统中的热动力之间的关系:本研究旨在开发一种程序,将二元电解溶液跨膜传输的 Kedem-Katchalsky 方程转换为基于 Peusner 网络热力学的 Kedem-Katchalsky-Peusner 方程。此外,还确定了膜系统中电化学能向自由能的转化:研究对象是纳米生物纤维素生物膜(Biofill),其氯化钠水溶液的传输参数是通过实验确定的。研究方法是二元电解质溶液的 Kedem-Katchalsky-Peusner 公式,并引入了 Peusner 系数:结果:得出了膜传输方程 L 版本的系数和 Peusner 耦合系数,它们是膜中 NaCl 浓度的函数。根据这些系数,计算了系统内能、向周围耗散的能量以及与电解质跨膜传输有关的自由能的通量,并将其作为膜上渗透力和电场力的函数:通过对 Kedem-Katchalsky 公式化中有关电解质溶液通过 Biofill 膜传输的系数进行转换而得到的 Peusner 系数,被用来计算膜过程的耦合系数和耗散能量通量。由于膜上的热动力,耗散能量通量采用二次方形式--得到了二度曲线。此外,耗散能量通量作为热动力的函数,使我们能够研究膜系统中传输过程的能量转换。
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L version of the transformed Kedem-Katchalsky equations for membrane transport of electrolyte solutions and internal energy conversion.

Background: One of the important formalisms of non-equilibrium thermodynamics is Peusner network thermodynamics. The description of the energy conversion in membrane processes, i.e., the conversion of the internal energy of the system into the dissipated energy and the free energy used for the work associated with the transport of solution components, allows us to describe the relationship between these energies and the thermodynamic forces acting in the membrane system.

Objectives: The aim of this study was to develop a procedure to transform the Kedem-Katchalsky equations for the transport of binary electrolytic solutions across a membrane into the Kedem-Katchalsky-Peusner equations based on Peusner network thermodynamics. The conversion of electrochemical energy to free energy in the membrane system was also determined.

Material and methods: The nanobiocellulose biomembranes (Biofill) were the subject of the study with experimentally determined transport parameters for aqueous NaCl solutions. The research method is the Kedem-Katchalsky-Peusner formalism for binary electrolyte solutions with introduced Peusner coefficients.

Results: The coefficients of the L version of the membrane transport equations and the Peusner coupling coefficients were derived as functions of NaCl concentration in the membrane. Based on these coefficients, the fluxes of internal energy of the system, energy dissipated to the surroundings and free energy related to the transport of electrolyte across the membrane were calculated and presented as functions of the osmotic and electric forces on the membrane.

Conclusions: The Peusner coefficients obtained from the transformations of the coefficients of the Kedem-Katchalsky formalism for the transport of electrolyte solutions through the Biofill membrane were used to calculate the coupling coefficients of the membrane processes and the dissipative energy flux. The dissipative energy flux takes the form of a quadratic form due to the thermodynamic forces on the membrane - second degree curves are obtained. Moreover, the dissipative energy flux as a function of thermodynamic forces allowed us to examine the energy conversion in transport processes in the membrane system.

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来源期刊
Polimery w medycynie
Polimery w medycynie Medicine-Medicine (all)
CiteScore
3.30
自引率
0.00%
发文量
9
审稿时长
53 weeks
期刊最新文献
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