Fouling of anion exchanger by image and FTIR analyses
Paweł Wiercik , Barbara Frączek , Przemysław Chrobot
AbstractOrganic fouling of an anion exchange resin results from the adsorption of the organics on its surface which blockthe diffusion of mobile ions inside the resin beads. As a result a decrease in a total capacity is observed. Generallythe performance of anion exchangers is determined based on the breakthrough curves and studies of the ad-sorption kinetics. To the authors’knowledge, the application of Fourier-transform infrared (FTIR) spectroscopyand image analysis to examine the surface changes of anion exchangers is a novel approach to this issue. Theimage analysis provides information about the size and the shape of the particles based on the morphologicalparameters and FTIR spectroscopy enables identification of the foulants.In this paper, image and FTIR analyses were applied to assess the effect of organic compounds on changes ofthe size and shape of a strongly basic anion exchanger in the process of treating of partially nitrificated digesterreject water. The digester reject water resulted from dewatering of sludge and subjected to partial nitrificationwas subsequently fed through the anion exchange resin.FTIR analyses enabled identification of the foulant as humic substances, which accumulated on the beadssurface and remained after regeneration. The image analyses helped to observe the changes of beads shapes fromsmooth and circular to uneven and oval.
|Journal series||Journal of Environmental Chemical Engineering, ISSN 2213-3437, (N/A 100 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Image analysis, FTIR spectroscopy, Ageing process, Organic fouling, Anion exchange resin, Humic substances|
|ASJC Classification||; ; ;|
|License||Journal (articles only); published final; ; with publication|
|Score||= 100.0, 14-09-2020, ArticleFromJournal|
|Publication indicators||= 1; : 2018 = 1.198|
|Citation count*||1 (2020-09-15)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.