Experimental Determination of Hydrodynamic Dispersion Coefficients for Modelling of Fixed-bed Biosorption
نویسندگان
چکیده
The aim of this work was to determine the hydrodynamic dispersion coefficient at different interstitial velocities for its application in a mass transport model to predict heavy metal biosorption onto Posidonia oceanica and peat. Tracing experiments with lithium chloride (LiCl) were performed in biosorbent packed beds of 10 and 27 cm length and flow rates between 10 and 100 cm 3 h −1 . Hydrodynamic dispersion coefficients were obtained by solving the mass balance equation for one-dimensional transport in the axial direction. Potential equations relating dispersion coefficient and interstitial velocity were obtained for both biosorbents, which were successfully coupled to a mass transport model to simulate the breakthrough curves for the sorption of copper onto Posidonia oceanica and peat at several flow rates.
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