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Effect of foulants on arsenic rejection via polyacrylonitrile ultrafiltration (UF) membrane

Authors
Journal
Desalination
0011-9164
Publisher
Elsevier
Publication Date
Volume
309
Identifiers
DOI: 10.1016/j.desal.2012.10.023
Keywords
  • Arsenic Rejection
  • Ultrafiltration
  • Polyacrylonitrile
  • Egg White
  • Ovalbumin
  • Humic Acid
Disciplines
  • Biology

Abstract

Abstract Arsenic rejection via modified polyacrylonitrile ultrafiltration (UF) membrane was found to be very high, however, the presence of commonly found foulants in arsenic solution affected membrane performance. The effect of commonly found foulants, such as ovalbumin, humic acid and egg white on arsenic rejection were studied. Experiments indicated that the As(V) rejection was affected by the total quantity of proteins and not the variety of proteins present in a solution. As(V) rejection was found to decrease with increasing proteins while fouling was found to increase from 25% for 0.1mg/ml to 33% for 0.5mg/ml egg white. The As(V) rejection was found to decrease with increasing concentration of humic acid for PAN membranes. Fouling studies showed that humic acid was a lesser foulant in comparison to egg white. However a combination of the two foulants led to a decrease in the overall fouling. pH was also found to be a very important factor for egg white dissolution and As(V) rejection.

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