Abstract
Abstract This paper presents experimental and modelling analysis of the application of nanofiltration for separation of chromium (III) from acidic salt solution. In the studies commercial nanofiltration HL membrane has been used. The experimental results have been interpreted by, based on the extended Nernst-Planck equation, Donnan and Steric Partitioning Pore (DSP) model. The obtained results showed satisfactory agreement between experimental and modelling data for the pressure range 10-24 bar and different concentrations of chloride and sulfate ions. It means that the DSP model may be helpful for the monitoring of nanofiltration applied to treatment of chromium wastewater.
Highlights
Nanofiltration membranes can be successfully applied for treatment of both surface and underground waters [1,2,3,4] and industrial wastewaters [5,6,7,8]
The aim of this work was to determine the applicability of the Donnan and Steric Partitioning (DSP) model to the prediction of the chromium (III) separation from acidic salt solution on nanofiltration membrane
The experimental results obtained for chromium (III) and chloride ions (Fig. 2) expressed relationships similar to the model
Summary
Nanofiltration membranes can be successfully applied for treatment of both surface and underground waters [1,2,3,4] and industrial wastewaters [5,6,7,8]. According to the literature data [5,7,8] and our own investigations [6, 9], one of the most important and interesting research area of nanofiltration is separation of chromium (III) from acidic salt solutions. That is why nanofiltration seems to be a promising process allowing for effective and efficient treatment of chromium tannery wastewater [5, 6, 8].
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