Ion exchange and membranes最新文献

Development of SIRA process for brackish water demineralization by ion exchange. 离子交换法脱盐微咸水SIRA工艺的研究进展。

Ion exchange and membranes Pub Date : 1975-12-01

G Boari, L Liberti, R Passino

引用次数: 0

Editorial: Hazards in polymer chemistry. 社论:聚合物化学中的危害。

Ion exchange and membranes Pub Date : 1975-12-01

J Mikes

引用次数: 0

Pore flow models and their applicability. 孔隙流动模型及其适用性。

Ion exchange and membranes Pub Date : 1975-12-01

M N Sarbolouki

{"title":"Pore flow models and their applicability.","authors":"M N Sarbolouki","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Pore flow models are classified and concisely reviewed, and it is shown that despite their apparent differences, they are equivalent. It is proven that the difference between the classic formula of Guerout-Elford-Ferry and the most recent ones developed by Pappenheimer-Ussing and Kedem-Katchalsky, is due to the introduction of a more proper viscosity coefficient for the water inside the membranes in the newer formulae. Fundamental assumptions involved in the models are restated and criteria for their applicability are mentioned. Arguments regarding the fundamental validity of the pore size formulae when applied to tight membranes, where continum hydrodynamics become questionable, are reviewed. Recent theoretical analysis of the situtation by Mikulecky, where he shows the calculated pore size merely reflects the extent of the membrane-water interaction is briefly presented. It is argued that since his analysis neglects the influence of the membrane-water interaction on the viscosity coefficient, his treatment is far from conclusive. In support of this argument, the results of the Kinetic studies of Levitt based on direct simulation through molecular dynamics is presented where water molecules (considered as non-interacting hard spheres of 1A radius) are observed in a rigid cylindrical pores of 3.2A in radius and 11A long. The pore size, calculated following the procedures of pore flow models, is in good agreement with the physical size of the simulated pore. It is then concluded that the fundamental validity of the pore flow models in the case of tight membranes is yet unsettled, theoretically, but empirically its validity seems confirmed in some instances.</p>","PeriodicalId":77184,"journal":{"name":"Ion exchange and membranes","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12397911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of the inner surface of macroporous ion exchange resins. 大孔离子交换树脂内表面的测定。

Ion exchange and membranes Pub Date : 1975-12-01

F Martinola, A Meyer

引用次数: 0

On the properties of solid and liquid ion exchangers. II. Infrared and NMR studies of lithium and cesium salts of dinonylnaphtalene sulfonic acid in heptane. 固体和液体离子交换剂的性质。2庚烷中二烷基萘磺酸锂盐和铯盐的红外和核磁共振研究。

Ion exchange and membranes Pub Date : 1975-12-01

V Soldatov, L Odberg, E Högfeldt

引用次数: 0

A novel technique for the study of dry process membranes during their nascent phases. 研究干法膜初生阶段的新技术。

Ion exchange and membranes Pub Date : 1974-01-01

R E Kesting