Thermodynamics and Kinetics of Biosorption of Vanadium with Macrofungus (Hypholoma fasciculare) and Determination by GFAAS


BAĞDA E., TÜZEN M., SARI A., Shemsi A. M., Bukhari A. A.

ATOMIC SPECTROSCOPY, vol.39, no.4, pp.170-177, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 4
  • Publication Date: 2018
  • Journal Name: ATOMIC SPECTROSCOPY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.170-177
  • Sivas Cumhuriyet University Affiliated: Yes

Abstract

In the present study, a macrofungus, Hypholoma fasciculare (H. fasciculare), was employed for the biosorption of vanadium from aqueous solutions. The characterization of H. fasciatlare was conducted using the FT-IR and SEM-EDS techniques before and after biosorption. The batch experimental parameters that affect the biosorption of vanadium on the macrofungus were optimized. The Langmuir, Freundlich, and D-R isotherms were employed, and it was found that the Langmuir and D-R models best explained the adsorption mechanism. The kinetic and thermodynamic characteristics of the biosorption mechanism were investigated in detail. The Langmuir biosorption capacity was found as 159.7 mg/g. The thermodynamic parameters showed that the biosorption of vanadium on the macrofungus was more feasible by decreasing the temperature and the exothermic character of Delta G degrees= -20.6 kJ/mol at 293 K and Delta G degrees= -19.9 kJ/mol at 323 K; Delta H degrees= -26.9 kJ/mol, Delta S degrees= -21.8 J/mol. K. The biosorption kinetics of vanadium onto the macrofungus H. lascictifare was best fitted with pseudo-second-order (R-2 >= 0.99). The desorption studies showed that 0.50 M of HNO3 effectively desorbs vanadium from H. fasciculare.