One-pot removal of pharmaceuticals and toxic heavy metals from water using xerogel-immobilized quartz/banana peels-activated carbon
| Autor: | Ibrahim Karume, Simon Bbumba, Moses Kigozi, Alice Nabatanzi, Is’harq Z. T. Mukasa, Solomon Yiga |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Green Chemistry Letters and Reviews, Vol 16, Iss 1 (2023) |
| Druh dokumentu: | article |
| ISSN: | 17518253 1751-7192 1751-8253 |
| DOI: | 10.1080/17518253.2023.2238726 |
| Popis: | ABSTRACTHere, we report the efficient one-pot removal of heavy metal ions and pharmaceuticals using xerogel, activated carbon and gravel. The simplest xerogel from tetramethyl orthosilicate showed ∼ twice the adsorption capacity of activated carbon derived from banana peels at 600 °C and far greater (x 35) than quartz pellets of diameter ∼300 μm. Functional groups present in both xerogel and activated carbon greatly enhanced the adsorption process. The combination of the three adsorbents resulted in the removal of > 95% of heavy metal ions and pharmaceuticals from water. The data fitted well in linear equations of Langmuir and Freundlich adsorption isotherms, and pseudo-first-order and pseudo-second-order kinetics, an indication for physisorption, chemisorption, adsorption and desorption processes during pollutant capture by the adsorbents. |
| Databáze: | Directory of Open Access Journals |
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