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Study of Pb2+ adsorption in a packed bed column of bentonite using CFD

2014; Elsevier BV; Volume: 104; Linguagem: Inglês

10.1016/j.clay.2014.11.021

1872-9053

Cezar Augusto da Rosa, Indianara Conceição Ostroski, Joziane Gimenes Meneguin, Marcelino Luiz Gimenes, Maria Angélica Simões Dornellas de Barros,

Enhanced Oil Recovery Techniques

In this study, experiments and CFD (Computational Fluid Dynamics) simulations were conducted to investigate lead ion (Pb2+) adsorption in bentonite. Experiments were carried out in a fixed bed column at 30°C, pH = 4.0 and average particle diameter of 0.127 mm. The influence of the flow rate on the breakthrough curves was examined with constant inlet concentration equal to 0.88 meq L-1. The CFD technique was used for the simulation of flow patterns and ion concentration profiles inside the fixed bed column during the adsorption process. A 2D axisymmetric model based on Navier-Stokes and diffusion-convection equations was used for simulating the fluid phase. Experimental data obtained for different inlet flow rates and Pb2+ concentrations were used for validating the model. The CFD simulations predicted the experimental behavior of the fixed bed adsorption very well in all conditions under study.