REMOVAL OF COPPER(II) IONS FROM AQUEOUS EFFLUENT USING MELAMINE-FORMALDEHYDE-DTPA RESIN IN A FIXED-BED UP-FLOW COLUMN | ||||
| The International Conference on Chemical and Environmental Engineering | ||||
| Article 17, Volume 3, 3rd International Conference On Chemical & Environmental Engineering, May 2006, Page 79-93 PDF (647.63 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iccee.2006.41070 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Baraka A. A.; Hall P. J; anoM. J. Heslop | ||||
| Department of Chemical and Process Engineering University of Strathclyde, Glasgow G1 1XJ, UK. | ||||
| Abstract | ||||
| ABSTRACT Melamine-Formaldehyde- diethylenetriaminepentaacetic acid (MF-DTPA) resin was prepared as a new adsorbent for removing heavy metals from wastewater effluents. In the synthesis process, the chelating agent diethylenetriaminepentaacetic acid (DTPA) anchored to melamine via amide covalent bond during melamineformaldehyde condensation reaction in aqueous acidic medium. Resin characterisation using FT-IR, elemental analysis and N2 gas adsorption (BET) were carried out to determine DTPA functionality and porosity. Water regain factor was also determined to find out hydrophilic character of the resin. Removal of Cu(II), as a representative of heavy metals, from synthetic wastewater using fixed-bed column packed with MF-DTPA grains was studied considering bed height, influent concentration and influent flow rate as controlling factors. The Thomas model was used to fit the adsorption data and its constants were evaluated. The Bed Depth Service Time (BDST) model was conducted to predict the service time of columns operated at different influent concentration and influent flow rates. It was found that DTPA successfully anchored to MF during resin matrix formation. The produced resin is hydrophilic (water regain 72%) and its surface area is 162 m2 g-1 with neglected micro-porosity. DTPA is suggested to be present as 0.93 mmole per gram solid resin. The removal of Cu(II) ion using fixed-bed mode column packed with MF-DTPA grains kinetically follows Thomas model. BDST model was found to fit the results and applicable for scaling up the system with dynamic capacity, N○=7232 mg ml-1 and active zone, Z○=2.2 cm. The MF-DTPA resin has a potential for removal of heavy metals from wastewater effluents. | ||||
| Keywords | ||||
| Heavy metals; copper(II) ion removal, adsorption; MF-DTPA resin; Thomas model; BDST model | ||||
|
Statistics Article View: 84 PDF Download: 156 |
||||
