Equilibrium studies for trimethoprim adsorption on montmorillonite KSF

Bekci Z., SEKİ Y., YURDAKOÇ M.

JOURNAL OF HAZARDOUS MATERIALS, cilt.133, ss.233-242, 2006 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 133
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jhazmat.2005.10.029
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.233-242
  • Anahtar Kelimeler: trimetophrim, adsorption, montmorillonite, adsorption kinetics, FT-IR, SOLID-PHASE EXTRACTION, TANDEM MASS-SPECTROMETRY, LIQUID-CHROMATOGRAPHY, WASTE-WATER, AQUEOUS-SOLUTIONS, ANTIBIOTICS, FLUOROQUINOLONE, PHARMACEUTICALS, VETERINARY, BENTONITE
  • Dokuz Eylül Üniversitesi Adresli: Hayır

Özet

In this study. the adsorption of trimethoprim (TMP) on montmorillonite KSF was studied under different conditions (pH, ionic strength, temperature). The results indicate that a pH value of 5.04 is optimum value for the adsorption of TMP on KSF. The adsorption kinetics was interpreted using pseudo-first-order kinetic model, pseudo-second-order kinetic model and intraparticle diffusion model. The pseudo-second-order model provides the best correlation with the experimental data of KSF adsorption. The adsorption data could be fitted with Freundlich, Langmuir and Dubinin-Radushkevich equation to find the characteristic parameters of each model. It was found that linear form of Langmuir isotherm seems to produce a better model than linear form of Freundlich equation. From the Langmuir and Freundlich equation, the adsorption capacity values raised as the solution temperature decreased. From DR isotherm, it was also determined that the type of adsorption can be considered as ion-exchange mechanism. Determination of the thermodynamic parameters Delta H-0, Delta S-0 and Delta G(0) showed that adsorption was spontaneous and exothermic in nature. It was also added that adsorption of TMP by KSF may involve physical adsorption. (c) 2005 Elsevier B.V. All rights reserved.