Adsorption of azo-dye Orange II from aqueous solutions using a metal-organic framework material: Iron- benzenetricarboxylate
| Autor: | Ricardo López Medina, Elizabeth Rojas García, Isaías Hernández Pérez, Maria J Valero, Marcos May Lozano, Ana Marisela Maubert Franco |
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| Přispěvatelé: | Consejo Nacional de Ciencia y Tecnología (México), Consejo Superior de Investigaciones Científicas (España), Universidad Autónoma Metropolitana (México) |
| Rok vydání: | 2014 |
| Předmět: |
Exothermic process
Inorganic chemistry iron-benzenetricarboxylate Azo dyes Orange (colour) lcsh:Technology Article symbols.namesake Adsorption Physisorption Adsorption process medicine General Materials Science lcsh:Microscopy lcsh:QC120-168.85 Aqueous solution lcsh:QH201-278.5 lcsh:T Chemistry Langmuir adsorption model Orange II Fe(BTC) lcsh:TA1-2040 Chemisorption symbols lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 Activated carbon medicine.drug azo-dye |
| Zdroj: | Materials Volume 7 Issue 12 Pages 8037-8057 Digital.CSIC. Repositorio Institucional del CSIC instname Materials, Vol 7, Iss 12, Pp 8037-8057 (2014) |
| ISSN: | 1996-1944 |
| Popis: | A Metal-Organic Framework (MOF), iron-benzenetricarboxylate (Fe(BTC)), has been studied for the adsorptive removal of azo-dye Orange II from aqueous solutions, where the effect of various parameters was tested and isotherm and kinetic models were suggested. The adsorption capacities of Fe(BTC) were much higher than those of an activated carbon. The experimental data can be best described by the Langmuir isotherm model (R2 > 0.997) and revealed the ability of Fe(BTC) to adsorb 435 mg of Orange II per gram of adsorbent at the optimal conditions. The kinetics of Orange II adsorption followed a pseudo-second-order kinetic model, indicating the coexistence of physisorption and chemisorption, with intra-particle diffusion being the rate controlling step. The thermodynamic study revealed that the adsorption of Orange II was feasible, spontaneous and exothermic process (-25.53 kJ·mol-1). The high recovery of the dye showed that Fe(BTC) can be employed as an effective and reusable adsorbent for the removal of Orange II from aqueous solutions and showed the economic interest of this adsorbent material for environmental purposes. © 2014 by the authors. The authors thank Autonomous Metropolitan University for its financial support to the project “Synthesis, modification and application of porous solid materials to sorption phenomena and catalysis”. Elizabeth Rojas-Garcia and Ricardo López-Medina thank CONACYT for their repatriation program fellowships. We acknowledge support by the CSIC Open Access Publication Initiative through its Unit of Information Resources for Research (URICI) |
| Databáze: | OpenAIRE |
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