A new approach to assessing the ageing process of strongly basic anion-exchange resins: Preliminary research.

QUOTING:

M. Domańska, T. Konieczny, M. Kusnierz, J. Łomotowski, P. Wiercik, A new approach to assessing the ageing process of strongly basic anion-exchange resins: Preliminary research., Desalination and Water Treatment 143 (2019) 148-157. doi:10.5004/dwt.2019.23497
Domańska M., Konieczny T., Kusnierz M., Łomotowski J., Wiercik P.,

Abstract

Fouling of the anion exchangers with organic compounds is a very common phenomenon. These compounds adsorb on the anion exchangers surfaces causing a decrease in the ion-exchange capacity. In practice, the performance of ion exchanger is generally assessed based on the breakthrough curves and the studies of the adsorption kinetics. There is little research in the literature concerning the surface changes of the resin beads. The image analysis enables recognition of the beads morphology, and Fourier-transform infrared (FTIR) spectroscopy enables detection of the foulants. To the authors’ knowledge, the application of these methods is a new approach to the organic fouling phenomenon. In this paper, image and FTIR analyses as well as scanning electron microscopy (SEM) were applied to assess the ageing process of two strongly basic anion exchangers in the process of treating of effluent containing high concentration of nitrites and nitrates. Effluent from sludge derived from fermentation chambers, dewatered on filter presses, and subsequently subjected to biological and membrane processes was fed through anion exchangers. The image, SEM and FTIR analyses indicated the accumulation of humic acids, which remained on the beads surface after regeneration, causing changes in the beads shape from circular to more elongated.

Contact

 

 

 

The Faculty of Environmental Engineering and Geodesy

Institute of Environmental Engineering

Wrocław University of Environmental and Life Sciences

Address:
pl. Grunwaldzki 24,
50-363 Wrocław

Project assumptions

The overall goal of the project is to develop an innovative multifactor mathematical model enabling monitoring of bath contamination used in the electropolishing process of austenitic stainless steels. This model will allow optimization and reduction of process costs and will have an impact on reducing environmental pollution during electrolytic polishing of austenitic stainless steels.

The final outcome of the project will consist in the development of a method of monitoring the gradual contamination of the electropolishing bath.

Team

The team deals with research in the field of electrochemistry, wastewater treatment, monitoring and optimization of processes in laboratory and industrial conditions. The diverse experience of individual members of the IonsMonit team is its strength.

 


 

Project: “A pioneering model for monitoring pollution of electropolishing process baths (IonsMonit)” financed by the National Center for Research and Development as part of the Lider programme.

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