Removal of mercury from aqueous solutions by adsorption on a new ultra stable mesoporous adsorbent and on a commercial ion exchange resin

International Journal of Industrial Chemistry

دوره 3، شماره 1، اسفند 2012، صفحه 235-240

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1186/2228-5547-3-1

نویسنده

Jeriffa De Clercq^*

Faculty of Applied Engineering Sciences, University College Ghent, Schoonmeersstraat 52, Ghent, 9000, Belgium

چکیده

Background
The performance of two adsorbents, i.e. a new ultra stable adsorbent SH-ePMO and a commercial ion exchange resin TP-214, for the removal of mercury from aqueous solutions was investigated. The operating variables studied were initial mercury concentration and contact time.
Results
The adsorption isotherms showed favourable adsorption. The adsorption isotherms were analysed using Langmuir and Freundlich models. The Langmuir model yielded the best fit for the SH-ePMO, whereas the Freundlich model fitted best the adsorption on TP-214. The maximum adsorption capacities were 66 and 456 mg/g for SH-ePMO and TP-214, respectively. TP-214 is capable of purifying water to parts per trillion levels.
The adsorption kinetics showed a fast adsorption for both adsorbents. The kinetics was analysed using Lagergren's pseudo-first-order and pseudo-second-order kinetic models. The pseudo-first-order kinetic model showed a good description of the experimental data of both adsorbents.
Conclusions
This study clearly shows the potential of the ultra stable SH-ePMO for removing mercury from aqueous solutions and confirms the performance of the ion exchanger resin TP-214.

کلیدواژه‌ها

Adsorption؛ Ion exchange resin؛ Mercury؛ Periodic mesoporous organosilica