Kinetics and Thermodynamic Study of Nitrate Adsorption on Granular Ferric Hydroxide
نویسندگان
چکیده
This study explored the feasibility of using granular ferric hydroxide as adsorbent for the removal of NO3-N. Optimum conditions for NO3-N removal were found to be pH 5.0 and equilibrium time 80min. The equilibrium sorption isotherm was better described by Langmuir sorption isotherm model. The maximum sorption capacity of granular ferric hydroxide was 4.254mg/g at 298K. A comparison of four kinetic models applied to the adsorption of NO3-N was evaluated. The experimental data fitted well the pseudo-second-order kinetic model. ∆H and ∆G all suggested that the adsorption of NO3-N onto granular ferric hydroxide was physisorption.
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