Characterization of Heavy Metal Biosorption from Aqueous Solutions with Nitzschia closterium Biomass
Makaleler > Tam Makale · 2013
Yazarlar: Duygu OVA ÖZCAN, Bikem Övez
Journal of selçuk üniversity natural and applied science, Uluslararası, 2013, cilt 2, ss 96-107
Özet
The sorption of Cd 2+ , Ni 2+ , Pb 2+ , Zn 2+ , Fe 3+ and Cr 6+ by a dried diatom Nitzschia closterium was investigated in a batch system. The experiments have been performed for the chosen temperature of 25°C and operational conditions such as constant agitation and pH 5.0 except for Cr 6+ at pH 2.0. The sorption of all metal ions rapidly reached equilibrium within 100 min. The maximum sorption capacities of the various metal components on N. closterium biomass could be prioritized in order from high to low as: Pb 2+ > Cd 2+ > Ni 2+ > Zn 2+ > Cr 6+ > . Fe 3+ where the removal efficiency increased in the order of Zn 2+ < Fe 3+ < Cr 6+ < Ni 2+ < Cd 2+ < Pb 2+ . Characterization of the metal-loaded biosorbent by FTIR spectrum confirmed that the metal ions can bind to anionic groups due to electrostatic attraction and sorption capacity is strongly influenced from the type and number of functional groups of the biosorbent.