T he potential of an arid-land plant, Euphorbia rigida E. rigida , for the removal of heavy metals [Pb II , Zn II , Cu II , Cd II , Ni II ] from aqueous solutions was studied in the current work. Batch sorption experiments were conducted to investigate the effects of pH, particle size, initial metal ion concentration, contact time and temperature. Besides, biosorption data was analysed by different isotherm and kinetic models. Equilibrium studies showed that the biosorption closely follows the Langmuir and Freundlich isotherms. From the kinetic point of view, pseudo-second order model gave the best fitting with the experimental results. The evaluated thermodynamic parameters showed that biosorption onto E. rigida was a feasible, spontaneous and endothermic process. The affinities of metal ions onto E. rigida decreased as Pb II > Zn II > Cd II > Cu II > Ni II in single metal biosorption. Besides, binary and ternary metal sorption studies were conducted to investigate the co-ion effect. Experimental results showed that E. rigida can be used as an alternative and effective low cost biosorbent for the removal of heavy metals from aqueous solutions
Euphorbia rigida Single-multi heavy metal biosorption Equilibrium Kinetics Thermodynamics
Birincil Dil | İngilizce |
---|---|
Bölüm | Research Article |
Yazarlar | |
Yayımlanma Tarihi | 28 Aralık 2017 |
Yayımlandığı Sayı | Yıl 2017 Cilt: 4 Sayı: 2 |
Hittite Journal of Science and Engineering Creative Commons Atıf-GayriTicari 4.0 Uluslararası Lisansı (CC BY NC) ile lisanslanmıştır.