The Water Molecules Dynamic Adsorption Performance Study in the Reverse Osmosis Membrane of Aromatic Polyamide Type

In order to understand the mass transfer process of water molecules in the reverse osmosis membrane based on the dynamic adsorption theory and diffusion transfer concept, according to the theory of random walk, the diffusion-adsorption equation is deduced at the beginning of dynamic adsorption around all diffusion regions. It was studied and analyzed the dynamic adsorption behaviour of H2O in reverse osmosis membrane of polyamide in the experiment, and the influence of the different temperature to the dynamic adsorption of the reverse osmosis membrane on the early stages was discussed, and calculated the abnormal diffusion index dw. The results showed that the water molecules in this aromatic polyamide type reverse osmosis membrane have the behaviour of abnormal dynamic adsorption, and the higher temperature was, the smaller the abnormal diffusion index dw was.