Adsorption of lysozyme from aqueous solutions by a novel bentonite-tyrptophane (Bent-Trp) microcomposite affinity sorbent

Kalburcu T., Tabak A., Ozturk N., Tuzmen N., AKGÖL S., ÇAĞLAR B., ...Daha Fazla

JOURNAL OF MOLECULAR STRUCTURE, cilt.1083, ss.156-162, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1083
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.molstruc.2014.11.055
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.156-162
  • Hacettepe Üniversitesi Adresli: Evet

Özet

This study deals with developing bentonite-tryptophan (Bent-Trp) microcomposite affinity sorbent (38-105 gm) for lysozyme adsorption from aqueous solutions. The structural analysis results of Bent-Trp microcomposites obtained from X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), thermal (TG-DTG/DTA) and elemental analysis techniques clearly pointed out that the pseudo-biospecific affinity ligand L-Tryptophan was penetrated into interlayer space of the bentonite by diplacing water molecules and an elemental analysis of immobilized L-Tryptophan for nitrogen was 541.3 mu mol g(-1) bentonite. The effects of initial concentration, pH, and temperature on the adsorption efficiency of this sorbent were also studied in a batch system. The maximum amount of lysozyme adsorption from aqueous solution was determined as 365.16 mg/g at pH 10.0 and 1.25 mg/mL initial concentration of lysozyme, while the non-specific adsorption of lysozyme was very low (4.21 mg g(-1) sorbent). We concluded that Bent-Trp microcomposite affinity sorbents could be repeatedly applied for lysozyme adsorption without significant losses in the adsorption capacity. (C) 2014 The Authors. Published by Elsevier B.V.