STUDIES ON THE FERRIC IRON SORPTION FROM ACID MINE DRAINAGE ON LEWATIT RESIN AS A STEP FOR METAL CONVERSION TO A VALUE-ADDED PRODUCT
| Autor: | Plamen Georgiev, Marina Nicolova, Maria–Filipa Ivanova, Irena Spasova, Stoyan Groudev |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Sustainable Extraction and Processing of Raw Materials Journal, Vol 2, Iss 2, Pp 36-41 (2021) |
| Druh dokumentu: | article |
| ISSN: | 2738-7100 2738-7151 |
| DOI: | 10.5281/zenodo.5594863 |
| Popis: | ABSTRACT. The study aimed to determine the optimal conditions for adsorption and elution of iron from acid mine drainage by ion–exchange resin LEWATIT MonoPlus TP 207 under a batch regime of operation. Langmuir’s sorption equation was employed to analyse the equilibrium data from the experiments. The data fitting demonstrated that the process obeyed pseudo–second–order kinetics with a linear regression coefficient (R2) of 0.9999. Because of the higher demand for hydrochloric solution (100 g/ L) for the ferric iron elution, we studied the effect of the preliminary stage of galvanic elution of Fe(III) to Fe(II) in the presence of H2. In that way, a slightly acidic solution (30 g/ L) was sufficient to desorb more than 95 % of iron from ion exchange resin LEWATIT MonoPlus TP 207 at a temperature of 70 °C. |
| Databáze: | Directory of Open Access Journals |
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