ASSESSMENT OF THE ADSORPTION KINETICS, EQUILIBRIUM AND THERMODYNAMICS FOR THE POTENTIAL REMOVAL OF NI2+ FROM AQUEOUS SOLUTION USING WASTE EGGSHELL

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ASLAN Ş., Polat A., Topcu U. S.

JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT, cilt.23, sa.3, ss.221-229, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 3
  • Basım Tarihi: 2015
  • Doi Numarası: 10.3846/16486897.2015.1005015
  • Dergi Adı: JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.221-229
  • Anahtar Kelimeler: adsorption isotherms, eggshell, nickel, thermodynamics, NICKEL, BIOSORPTION, IONS, ISOTHERM, COPPER(II), SORPTION, BAGASSE
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

In this study, Ni2+ sorption onto the waste eggshell was investigated under different operational conditions. Results indicated that the eggshell could be successfully used to remove Ni2+ ions from the water. Quick sorption process reached to equilibrium in about 2 hours with maximum sorption at pH 7.0. Based on the experimental data, Langmuir isotherm model with the q(m) value of 1.845mg Ni2+/g eggshell was observed. The pseudo-second-order model provided the best correlation coefficient in comparison with other models. The calculated q(e) values derived from the pseudo-second-order for sorption of Ni2+ ions were very close to the experimental (q(exp)) values. Such thermodynamic parameters as G degrees, H degrees, and S degrees were determined in order to predict the nature of adsorption. Results indicated that the adsorption of Ni2+ onto the eggshell was endothermically supported by the increasing adsorption of Ni2+ ions with temperature.