The removal of toxic metals from liquid effluents by ion exchange resins. Part XIX: Chromium(III)/OH-/Dowex 1x8
[ENG] The removal of chromium(III) from alkaline solutions by the anion exchange resin Dowex 1x8 was investigated. Several experimental variables were considered in this investigation: hydrodynamic conditions applied on the system, temperature, NaOH concentration in the aqueous feed and resin dosage...
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2025 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/417549 |
| Online Access: | http://hdl.handle.net/10261/417549 |
| Access Level: | Open access |
| Keyword: | Cromo(III) Disoluciones alcalinas Dowex 1x8 Efluentes líquidos Eliminación Nanotubos de carbono de pared múltiple http://metadata.un.org/sdg/9 Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation |
| Summary: | [ENG] The removal of chromium(III) from alkaline solutions by the anion exchange resin Dowex 1x8 was investigated. Several experimental variables were considered in this investigation: hydrodynamic conditions applied on the system, temperature, NaOH concentration in the aqueous feed and resin dosage. Based on the experimental results several models were used to a better understanding of the anion exchange process, thus, it was found that this exchange process was governed by the particle (resin bead) diffusion rate law, and follows the pseudo-second order kinetic model. Also, chromium(III) uptake onto the resin responded well to the Langmuir type-2 isotherm in a spontaneous process. In terms of chromium(III) uptake, the resin presented a better metal-load that multiwalled carbon nanotubes. HCl solutions presented acceptable characteristics to be used as eluents for chromium(III) loaded onto the resin. |
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