Efficient adsorption of Pb(II) ions using novel adsorbent polyacrylamide/coffee ground composite: isotherm, kinetic and thermodynamic studies

Keskin Z. S.

Polymer Bulletin, cilt.81, sa.9, ss.8425-8446, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 81 Sayı: 9
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1007/s00289-023-05111-x
  • Dergi Adı: Polymer Bulletin
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Sayfa Sayıları: ss.8425-8446
  • Anahtar Kelimeler: Adsorption, Coffee ground, Hybrid composite, Pb, Polyacrylamide
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

In this study, an effective and inexpensive PAA-CG composite was synthesized using polyacrylamide (PAA) and coffee ground (CG) with the help of the in situ polymerization method. The adsorption efficiency of this new composite was investigated in the removal of Pb(II) ions from an aqueous solution. Characterization was done by Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive spectroscopy and zero charge point analysis. The maximum adsorption capacity of the PAA-CG composite was calculated as 0.622 mol/kg according to the Langmuir isotherm model. From the obtained data, it was determined that the adsorption mechanism is compatible with pseudo-second-order kinetics and intra-particle diffusion model. The calculated thermodynamic data showed that adsorption is endothermic, spontaneous and entropy increasing.