A metal ion charged mixed matrix membrane for selective adsorption of hemoglobin

K.K.R. Tetala, Katarzyna Skrzypek, M. Levisson, Dimitrios Stamatialis

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Scopus)
2 Downloads (Pure)

Abstract

In this work, we developed a mixed matrix membrane by incorporating 20–40 μm size iminodiacetic acid modified immobeads within porous Ethylene vinyl alcohol (EVAL) polymer matrix. The MMM were charged with copper ions for selective adsorption of bovine hemoglobin in presence of bovine serum albumin. EVAL membrane without immobead and immobead alone showed low non-specific adsorption towards bovine hemoglobin and bovine serum albumin. Use of buffers with pH ⩽6.8 i.e. pI of bovine hemoglobin resulted in high bovine hemoglobin adsorption. The developed mixed matrix membrane has a maximum static adsorption capacity of 219.5 mg bovine hemoglobin per g bead and the adsorption isotherm curve is of a Langmuir type. Under similar flow rates, the mixed matrix membrane showed significant low pressure drop compared to a packed bed column containing equal amount of beads. Maximum and faster (6 h) adsorption of bovine hemoglobin can be achieved through dynamic mode only using mixed matrix membrane and not by packed bed column and static mode of mixed matrix membrane. The mixed matrix membrane has three times selective adsorption of bovine hemoglobin than bovine serum albumin, from a binary mixture containing equivalent amounts of both proteins.
Original languageUndefined
Pages (from-to)20-26
JournalSeparation and purification technology
Volume115
DOIs
Publication statusPublished - 2013

Keywords

  • IR-89800
  • METIS-301085

Cite this