Research and evaluation of nitrate ion absorption from aqueous solution by new nanocomposite based on vermiculite

International Journal of Industrial Chemistry

دوره 13، شماره 4، اسفند 2022

نوع مقاله: research article

شناسه دیجیتال (DOI): 10.47176/IJIC.13.4.1

نویسندگان

Ehsan Ghorbannezhad¹؛ Susan Khosroyar^{* 2}؛ Farzad Kaj³

¹Department of Chemical Engineering,Quchan branch,Islamic Azad University,Quchan,Iran

²Associated Professor, Department of Chemical Engineering,Quchan branch,Islamic Azad University,Quchan

³Department of Agriculture and Environmental Engineering ,Rostock University ,Rostock ,Deutschland ,Germany

چکیده

In the present study, vermiculite/aluminum oxide nanocomposite adsorbent was affected by ultrasound waves by gel degradation method. The ability to absorb nitrate ions from aqueous solutions was evaluated by this adsorbent. First, the adsorbent was prepared and characterized, that SEM, XRD, FTIR and BET analyzes were used for characterization and then discontinuous absorption experiments were performed to remove nitrate ions from the synthetic solution. The effect of various factors such as initial concentration, pH, amount of adsorbent, contact time and temperature on the adsorption process was evaluated. Kinetic models were used to test the experimental data in order to show the adsorption mechanism and process rate control steps such as mass transfer and chemical reactions. The results indicate that the Longmire isotherm model and pseudo-second order kinetics agree with the nitrate ion adsorption data by the adsorbent. Thermodynamic analysis indicates that the absorption process is endothermic and spontaneous. The results showed that the above adsorbent can be introduced as a suitable adsorbent for removing nitrate ions from aqueous solutions.

کلیدواژه‌ها

kinetics؛ nitrate؛ adsorption isotherm؛ vermiculite؛ aluminum oxide