Adsorption of Pb(II) by Modified and Activated prepared from Deniella oliveri Stem bark
No Thumbnail Available
Date
2016
Journal Title
Journal ISSN
Volume Title
Publisher
Chemical Society of Nigeria
Abstract
eniella oliveri stem bark was modified using citric acid and activated chemically in the Laboratory. The
samples were characterized by physico-chemical and spectroscopic methods. The physico-chemical methods
used include ash content, point of zero charge, pH, moisturecontent, bulk density, volatile component and iodine
value while the spectroscopic methods used are X-ray fluorescence (XRF) and Scanning Electron microscopy.
The prepared adsorbents were employed in adsorption of Pb(II) ion from aqueous solution and influence of
some physicochemical parameters on the adsorption process were also investigated.The adsorption data fitted
the Langmuir adsorption data better than the Freundlich isotherm with correlation coefficients of 0.988 and the
result of kinetics studies revealed that the data followed the pseudo-second order best which implies that the
adsorption process is a chemical process. The result of this study revealed that citric acid modified bark stem
has a higher adsorption capacity when compared with the activated one.
Description
Keywords
Deniella oliveri; Adsorption; Adsorption isotherm; Pollution, Heavy metals; Lead(II) ions