ADSORPTION OF Cr(VI) BY Zea mays RACHIS
Removal of Cr(VI) from aqueous solutions byZea maysrachis (ZMR) was studied. The BET surface area of theZeamaysmaterial was 1.25±0.01 m2g−1, with an average pore size of 4.71 nm. Experimental data show a 100% of Cr(VI)is removed in a period of 4 hours at pH between 1 and 3. A pH value of 3 was chose...
| Autores: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | México |
| Institución: | Universidad de Guanajuato |
| Repositorio: | Redalyc-UG |
| OAI Identifier: | oai:redalyc.org:62049878025 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=62049878025 |
| Access Level: | acceso abierto |
| Palabra clave: | Ingeniería Cr(VI) Zea mays Adsoption adsorption aqueous solutions |
| Sumario: | Removal of Cr(VI) from aqueous solutions byZea maysrachis (ZMR) was studied. The BET surface area of theZeamaysmaterial was 1.25±0.01 m2g−1, with an average pore size of 4.71 nm. Experimental data show a 100% of Cr(VI)is removed in a period of 4 hours at pH between 1 and 3. A pH value of 3 was chosen for the adsorption studies, with amaximum adsorption capacity of 2 mg g−1and a Cr(VI) adsorption percentage onto ZMR of 98.6%. The Freundlich modelrepresented the equilibrium of the adsorption process better than Langmuir model. The adsorption kinetics of Cr(VI) ontoZMR were well defined using the pseudo-second order model. The results showed that ZMR is a potential biomaterial forCr(VI) removal and pH has an important effect on metal adsorption capacity. The Cr(VI) reduction to Cr(III) was observedduring the adsorption process. |
|---|