Evaluation Of Posidonia Oceanica And Organic
Sediment As Biosorbents:
Cu Removal In Fixed Bed Columns
Author(s)
F. J. Álvarez-Hornos, C. Gabaldón, M. Izquierdo & P. Marzal
Abstract
In this work, fixed bed column experiments were performed with the aim of
evaluating the Cu uptake capacity of two biosorbents. The marine phanerogam
Posidonia oceanica, a waste from local beach cleaning practices at Denia
(Spain), and locally available organic sediment, a highly mineralized peat from
Torreblanca (Spain) were used. Column runs were carried out to determine the
sorption isotherm. For this purpose, breakthrough curves up to the exhaustion
point were obtained. Maximum uptake capacities were experimentally
determined in 56.7 mg·g-1 and 43.3 mg·g-1 for Posidonia oceanica and organic
sediment, respectively. High retention capacities indicate that these materials
could be used as effective biosorbents for Cu removal. Langmuir equilibrium
parameters were obtained for both biosorbents. A mass transport model
including convection-dispersion and sorption processes under equilibrium or
rate-controlled conditions has been developed to simulate column performance.
Good compliance between experimental and modelling results was obtained.
Keywords: Cu, biosorption, Posidonia oceanica, organic sediment, column
experiments, mass transport model.
1 Introduction
Biosorption has been revealed as a promising low-cost technology for heavy
metal removal from water and wastewater. Many investigators have studied the
sorption capacity of low-cost materials such as wood bark [1], peat [2, 3], lignin
[4], agroindustrial wastes [5, 6] and different types of biomass [7, 8]. A major
part of the literature data relating to the use of low-cost adsorbents for metal
Keywords
Cu, biosorption, Posidonia oceanica, organic sediment, column
experiments, mass transport model.
Related Book
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