Nanofiltration

One of the principal purposes of transport characterization is obtaining input information for a predictive modelling of membrane performance. To be able to fit the model parameters in a unique way for a given feed composition, additional measurements other than single salt rejections are needed. Th

In this paper the results of an applied research project within the scope of the transfer centre 4031 funded by the German Research Foundation (DFG) are presented. In cooperation with the Henkel Genthin GmbH investigations have been made on the application of UF/NF membrane processes for the separat

The potential of using the integrated membrane system based on ultrafiltration (UF) and nanofiltration (NF) in purification of effluents from a cable factory was investigated. The UF experiments were performed using tubular membranes taking into consideration the composition of the treated effluents

The experimental results of the pilot scale application of different membrane technologies, supported by clariflocculation and ozonization, for textile wastewater reuse are described. The investigation has been carried out by treating two different textile effluents: a secondary effluent coming from

Several nanofiltration and tight ultrafiltration membranes were tested by mill-site filtrations using a DSS-Labstak M20-filter. Retention, flux and fouling were analysed. Membranes were also characterised by measuring contact angles and pure water permeability. These data were used to explain the ex

A nanofiltration membrane has been developed by UV-photografting. Sodium p-styrene sulfonate was used for the modification of a polysulfone ultrafiltration membrane. The membrane cut-off was estimated. The grafted membranes have been evaluated for the removal of five different dyes with an aim to re

Sugar, as the final product of the technology of sugar production, has to satisfy rigorous quality demands. Among others, it means low content of non-sucrose compounds, as well as the smallest possible share of coloured matters. Ultrafiltration and nanofiltration can be one of the solutions for a mo

Purification of phosphoric acid by reverse osmosis (RO) and nanofiltration (NF) was studied using different commercial membranes of common industrial use. Both techniques represent an interesting alternative in purifying industrial phosphoric acid solutions. RO is a good choice to purify solutions u

The separation of reaction products from catalysts is a major problem existing in many forms of homogeneous catalysis, including phase transfer catalysis and transition metal catalysed reactions. This study describes a new and generic approach to solving this separation problem using solvent resista

The retention of Na+ and Mg2+ ions in their nitrate solutions was studied in the pH range 0.5–7. Three different Mg concentrations were used. Two nanofiltration membranes (NF 45 and Desal-5 DK) were tested. The NF 45 membrane showed higher retention values for the tested ions. The Mg2+ ions were ver