Removal of Cu(II) from Aqueous Solution Using a Micaceous Mineral of Kenyan Origin
| Autor: | Stephen Attahiru, Paul M. Shiundu, John M. Onyari, Eliud M. Mathu |
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| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Adsorption Science & Technology, Vol 21 (2003) |
| Druh dokumentu: | article |
| ISSN: | 0263-6174 2048-4038 |
| DOI: | 10.1260/026361703322404412 |
| Popis: | A micaceous mineral (MicaM) available locally in Kenya was utilized as an inexpensive and effective adsorbent for the removal of Cu 2+ ions from aqueous solution. The effects of contact time, pH, temperature, adsorbate and adsorbent concentrations, and the concentration of electrolyte on the removal of Cu 2+ ions were studied. Maximum removal of Cu 2+ ions occurred over the pH range 4.0–7.0. The adsorption of Cu 2+ ions increased with an increase in the dose ratio of mineral to Cu 2+ ion concentration and decreased with adsorbent particle size. Isotherm analysis of the adsorption data obtained at 25°C showed that the adsorption of Cu 2+ ions on MicaM followed both the Langmuir and Freundlich isotherms. The uptake of Cu 2+ ions increased on increasing the pH of the solution from 1.5 to 7.0 as well as on increasing the temperature from 25°C to 60°C. An adsorption capacity of 0.850 g/g was achieved for MicaM towards the Cu 2+ ion. This study has demonstrated that locally abundant micaceous mineral can be used as an effective adsorbent for the treatment of waters containing Cu 2+ ions without any prior chemical pretreatment. |
| Databáze: | Directory of Open Access Journals |
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