Effect of pH on lead removal from water using tree fern as the sorbent

The sorption of lead from water onto an agricultural by-product, tree fern, was examined as a function of pH. The sorption processes were carried out using an agitated and baffled system. Pseudo-second-order kinetic analyses were performed to determine the rate constant of sorption, the equilibrium...

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Bibliographic Details
Published in:Bioresource technology 2005-07, Vol.96 (11), p.1292-1296
Main Author: Ho, Yuh-Shan
Format: Article
Language:English
Subjects:
Absorption
Adsorption
Agronomy. Soil science and plant productions
Biological and medical sciences
Biological treatment of waters
Biosorption
Biotechnology
effluents
Environment and pollution
Ferns
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Hydrogen-Ion Concentration
Industrial applications and implications. Economical aspects
Kinetics
Lead
Lead - pharmacokinetics
Models, Chemical
Plant Stems - metabolism
Pseudo-second-order
sorbents
sorption
Tree fern
tree ferns
Use of agricultural and forest wastes. Biomass use, bioconversion
Water Purification - methods
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Summary:The sorption of lead from water onto an agricultural by-product, tree fern, was examined as a function of pH. The sorption processes were carried out using an agitated and baffled system. Pseudo-second-order kinetic analyses were performed to determine the rate constant of sorption, the equilibrium sorption capacity, and the initial sorption rate. Application of the pseudo-second-order kinetics model produced very high coefficients of determination. Results showed the efficiency of tree fern as a sorbent for lead. The optimum pH for lead removal was between 4 and 7, with pH 4.9 resulting in better lead removal. Ion exchange occurred in the initial reaction period. In addition, a relation between the change in the solution hydrogen ion concentration and equilibrium capacity was developed and is presented.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2004.10.011