Pb(II) Removal from Aqueous Solutions by Using Wastes of Pinus Strobus Bark
Journal Title: BULETINUL INSTITUTULUI POLITEHNIC DIN IASI, CHIMIE SI INGINERIE CHIMICA - Year 2017, Vol 63, Issue 3
Abstract
The influence of significant operational parameters on the Pb(II) sorption process by Romanian Pinus strobus has been studied in batch conditions. The uptake of Pb(II) from solutions with different initial concentrations of Pb(II) increased progressively with increasing initial pH from 2 to 5-5.5. The percent removal of Pb(II) varied from 84% to 98% for an increase of bark waste dose to 4 at 60 g/ L. The sorption isotherm studies clearly indicated that the sorptive behavior of Pb(II) ions on Romanian Pinus strobus bark under study satisfies not only the Langmuir assumptions, but also the Freundlich assumption. The calculated values for the isothermal thermodynamic parameters show that Pb(II) ions retention by pine bark is a spontaneous process of endothermic and chemical nature. The sorption kinetics for Pb(II) ions removal from aqueous solutions was very well described by pseudo-second order model.
Authors and Affiliations
LAVINIA TOFAN, CARMEN PĂDURARU, ION BUNIA, ROXANA LAURA MIHĂILESCU AMĂLINEI, ANCA MIRON
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