A novel material poly(N-acryloyl-L-serine)-brush grafted kaolin for efficient elimination of malachite green dye from aqueous environments

Yılmaz Ş., Zengin A., Şahan T.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, cilt.601, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 601
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.colsurfa.2020.125041
  • Dergi Adı: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Biotechnology Research Abstracts, Chimica, Compendex, EMBASE, INSPEC
  • Anahtar Kelimeler: Adsorption, Kaolin, L-serine, Malachite Green, Polymer brush, Response surface methodology, POTENTIAL ADSORBENT, ENHANCED ADSORPTION, CLAY NANOPARTICLES, POLYMER BRUSHES, METHYLENE-BLUE, SULFONIC-ACID, CATIONIC DYES, FLY-ASH, REMOVAL, NANOCOMPOSITES
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

In the present work, poly(N-acryloyl-L-serine) grafted-kaolin (PNALS@K) synthesized with the surface-initiated reversible addition fragmentation chain transfer (SI-RAFT) polymerization method is reported for the efficient removal of malachite green (MG) dye from aqueous environments. The characterization of PNALS@K was carried out by scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), energy dispersive x-ray spectroscopy (EDX), and contact angle measurements. The surface characterization analysis indicates there is a thin layer of PNALS on the kaolin surface. Four parameters (starting pH, starting MG concentration (C-o), adsorbent dosage (m), and contact time (t)) were evaluated using response surface methodology (RSM) combined with central composite design (CCD) for the removal of MG by PNALS@K. The optimum adsorption conditions for the removal of MG using PNALS@K were determined as starting pH = 8.92, C-o = 23.49 mg/L, m = 17.44 mg, and t = 72.2 min. The results indicated that PNALS@K has maximum adsorption decolorization performance of 98.90% for MG% removal at the optimal points. Moreover, adsorption data obeyed the Weber-Morris, liquid film diffusion and pseudo-second-order kinetic models. According to the isotherm results, it was also observed that Freundlich isotherm model presented a better fit.