Removal of Reactive Black 5 from wastewater using natural clinoptilolite modified with apolaccase


NADAROĞLU H., Kalkan E., ÇELEBİ N., TAŞĞIN E.

CLAY MINERALS, cilt.50, sa.1, ss.65-76, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 50 Sayı: 1
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1180/claymin.2015.050.1.07
  • Dergi Adı: CLAY MINERALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.65-76
  • Anahtar Kelimeler: Reactive Black 5 dye removal, apolaccase-modified clinoptilolite, adsorption isotherms, adsorption kinetics, MALACHITE GREEN-DYE, AQUEOUS-SOLUTIONS, ACTIVATED CARBON, METHYLENE-BLUE, FLY-ASH, ADSORPTION, EQUILIBRIUM, ADSORBENTS, ZEOLITES, KINETICS
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study, a clinoptilolite modified with apolaccase was used to adsorb Reactive Black 5 (RB5) dye from aqueous solution using the batch procedure. The influences of pH, contact time, temperature and absorbent dosage on the adsorption were investigated. The optimum adsorption was obtained at pH = 6, contact time = 60 min, temperature = 25 degrees C and adsorbent dosages of 1.62 and 1.59 mg/50 mL per gram of clinoptilolite and of apolaccase-modified clinoptilolite (LMC), respectively). The adsorption experimental data fitted both the Langmuir and Freundlich isotherm models well. In addition, pseudo-first-order and pseudo-second-order kinetics were used to study the kinetics of RB5 dye adsorption onto natural clinoptilolite and LMC. Adsorption appears to follow pseudo-second-order kinetics with a high correlation coefficient. Thermodynamic parameters such as changes in the free energy (Delta G degrees), enthalpy (Delta H degrees) and entropy (Delta S degrees) of adsorption were calculated. The thermodynamic parameters indicate that the adsorption of RB5 dye onto LMC was less spontaneous, feasible and endothermic. The LMC can be used as an alternative low-cost adsorbent for the dye removal from aqueous solutions.