Transport

Plasticized cellulose triacetate membranes with dinonylnaphthalenesulfonic acid (DNNS) as the ion carrier containing 2-nitrophenyl pentyl ether as the plasticizer were synthesized for competitive transport and sorption of Cs-137, Sr-90, and Co-60 radioisotopes from aqueous solutions of sodium nitrat

Transport of basic amino acids during the electrodialysis is studied and the procedures of their recovery from various mixtures are suggested. Peculiarities of basic amino acids transfer through the ion-exchange membranes are closely connected with their amphoteric nature and high values of isoelect

In this work, we present the relations between the transport coefficients for the system multi-ion solution/ionexchange membrane resulting from the neglecting of ion Á ion interactions. We present one of the possible sets of the practical transport coefficients for that system, and we show how to ob

The extraction and transport behaviour of uranium from nitric acid medium across a supported liquid membrane has been studied using di(2-ethylhexyl)isobutyramide as the carrier. The effects of experimental parameters such as nature of diluents, e.g., n-dodecane, benzene, chloroform, tert-butyl benze

This paper presents a comprehensive spatial model for exploring the interaction between road transportation and environment. The potential negative impacts of transportation on environment can be listed as degradation of air quality, greenhouse gas emissions, increased threat of global climate chang

The transport of zinc complexes ions through an anion exchange membrane was evaluated by the treatment of solutions with and without cyanide. The ionic transport was analyzed as a function of the applied current density and of the cyanide and hydroxyl concentration. Experimental results showed that

In the frame of a global process of marginal ores treatment and of the treatment of solid residues containing heavy metals, we can associate the techniques of static solid–liquid extraction to the techniques of static liquid– liquid extraction. The static solid–liquid extraction or leaching is now w

The conjectured development of early biological membranes is outlined and their properties reviewed. It is suggested the mimicking such early structures could lead to the development of new types of highly selective membranes.

The simultaneous recovery of trivalent and tetravalent chromium ions through charged ion-exchange membranes by using three detachable cells was tested at different current densities. The effect of mono- and divalent valence ions corresponding to trivalent and hexavalent chromium ions in the feed pha

The transport of a trivalent chromium ion through charged polysulfonated cation-exchange membranes in the presence of metals of different valences under Donnan dialysis conditions was studied as a function of pH gradient at 25°C. The recovery factor (RF) values of chromium ion were obtained, and it