Remediation of Aqueous Solutions Containing Zn(II) Ions by Using Wastes of Abies Alba Bark
Journal Title: BULETINUL INSTITUTULUI POLITEHNIC DIN IASI, CHIMIE SI INGINERIE CHIMICA - Year 2018, Vol 64, Issue 2
Abstract
Batch sorption capability of Romanian Abies alba bark wastes for the removal of Zn(II) ions from diluted aqueous solutions has been investigated as function of initial pH, sorbent dose, metal ion concentration, temperature, and contact time. The ability of the bark waste for Zn(II) sorption exhibited a maximum at pH 4.5-5. The percent removal of Zn(II) from solution with an initial concentration of 71.4 mg/L varied from 15% to 87.9% for an increase of bark waste dose to 2 at 30 g/L. The equilibrium data are best explained by both Langmuir and Freundlich sorption isotherm. Thermodynamic parameters also favor the sorption of heavy metal ions under study on Abies alba bark. Kinetics of sorption follows pseudo – first order rate equation. This valuable use of Abies alba bark may not only convert this waste material into low- cost effective sorbent, but also provide a viable solution to its disposal.
Authors and Affiliations
LAVINIA TOFAN, CARMEN PĂDURARU, ION BUNIA, ROXANA LAURA MIHĂILESCU AMĂLINEI, ANCA MIRON
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