Simulation of a fixed bed adsorber packed with protonated cross-linked chitosan gel beads to remove nitrate from contaminated water [An article from: Chemical Engineering Journal]

This digital document is a journal article from Chemical Engineering Journal, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Nitrate, contained in surface or groundwater, can be removed by sorption on protonated cross-linked chitosan gel beads. The sorption capacity is large enough to meet the standard of drinkable water. The isothermal equilibrium curves are straight lines which were established for a contaminated groundwater. The sorption kinetics is not limited by pore diffusion and is well modelled by a phenomenological equation. The experimental partition coefficient and overall mass transfer coefficient were used for simulating a plug flow fixed bed adsorber. The trend of the breakthrough curve was not affected by sinusoidal variations of the superficial velocity, which shows that the design can be carried out considering a conventional step injection. The breakthrough curve is more sensitive to the packing length than to the column diameter.