Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons
The aim of the study was to evaluate the possibility of applying commercial activated carbons currently used in water treatment plants and modified carbon at 400 and 800 °C in the atmosphere of air, water vapour and carbon dioxide to remove chloramphenicol. Adsorption kinetics was examined...
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| Format: | Article |
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MDPI AG
2019-05-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/11/6/1141 |
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| author | Joanna Lach |
| author_facet | Joanna Lach |
| author_sort | Joanna Lach |
| collection | DOAJ |
| description | The aim of the study was to evaluate the possibility of applying commercial activated carbons currently used in water treatment plants and modified carbon at 400 and 800 °C in the atmosphere of air, water vapour and carbon dioxide to remove chloramphenicol. Adsorption kinetics was examined for solutions with pH of 2−10. Adsorption kinetics were determined for the initial concentration of chloramphenicol of 161 mg/dm<sup>3</sup> and the adsorption isotherm was determined for the concentrations of 161 to 1615 mg/dm<sup>3</sup>. Of the analysed activated carbons (F-300, F-100, WG-12, ROW 08 Supra and Picabiol), the highest adsorption capacity was obtained for the use of Picabiol (214 mg/g), characterized by the highest specific surface area and pore volume. The pH value of the solution has little effect on the adsorption of chloramphenicol (the highest adsorption was found for pH = 10, qm = 190 mg/g, whereas the lowest—for pH = 6, qm = 208 mg/g). Modification of activated carbon WG-12 at 800 °C caused an increase in adsorption capacity from 195 mg/g (unmodified carbon) to 343 mg/g. A high correlation coefficient was found between the capacity of activated carbons and the total volume of micropores and mesopores. Among the examined adsorption kinetics equations (pseudo-first order, pseudo-second order, Elovich, intraparticle diffusion), the lowest values of the R<sup>2</sup> correlation coefficient were obtained for the pseudo-first order equation. Other models with high correlation coefficient values described the adsorption kinetics. The adsorption results were modelled by means of the Freundlich, Langmuir, Temkin and Dubibin−Radushkevich adsorption isotherms. For all activated carbons and process conditions, the best match to the test results was obtained using the Langmuir model, whereas the lowest was found for the Dubibin−Radushkevich model. |
| first_indexed | 2024-04-13T02:50:40Z |
| format | Article |
| id | doaj.art-90966fdcb3224dceb6b9be15508d44ec |
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| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-04-13T02:50:40Z |
| publishDate | 2019-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-90966fdcb3224dceb6b9be15508d44ec2022-12-22T03:05:51ZengMDPI AGWater2073-44412019-05-01116114110.3390/w11061141w11061141Adsorption of Chloramphenicol on Commercial and Modified Activated CarbonsJoanna Lach0Institute of Environmental Engineering, Faculty of Infrastructure and Environment, Czestochowa University of Technology, Brzeźnicka 60a, 42-200 Częstochowa, PolandThe aim of the study was to evaluate the possibility of applying commercial activated carbons currently used in water treatment plants and modified carbon at 400 and 800 °C in the atmosphere of air, water vapour and carbon dioxide to remove chloramphenicol. Adsorption kinetics was examined for solutions with pH of 2−10. Adsorption kinetics were determined for the initial concentration of chloramphenicol of 161 mg/dm<sup>3</sup> and the adsorption isotherm was determined for the concentrations of 161 to 1615 mg/dm<sup>3</sup>. Of the analysed activated carbons (F-300, F-100, WG-12, ROW 08 Supra and Picabiol), the highest adsorption capacity was obtained for the use of Picabiol (214 mg/g), characterized by the highest specific surface area and pore volume. The pH value of the solution has little effect on the adsorption of chloramphenicol (the highest adsorption was found for pH = 10, qm = 190 mg/g, whereas the lowest—for pH = 6, qm = 208 mg/g). Modification of activated carbon WG-12 at 800 °C caused an increase in adsorption capacity from 195 mg/g (unmodified carbon) to 343 mg/g. A high correlation coefficient was found between the capacity of activated carbons and the total volume of micropores and mesopores. Among the examined adsorption kinetics equations (pseudo-first order, pseudo-second order, Elovich, intraparticle diffusion), the lowest values of the R<sup>2</sup> correlation coefficient were obtained for the pseudo-first order equation. Other models with high correlation coefficient values described the adsorption kinetics. The adsorption results were modelled by means of the Freundlich, Langmuir, Temkin and Dubibin−Radushkevich adsorption isotherms. For all activated carbons and process conditions, the best match to the test results was obtained using the Langmuir model, whereas the lowest was found for the Dubibin−Radushkevich model.https://www.mdpi.com/2073-4441/11/6/1141chloramphenicolactivated carbonadsorption |
| spellingShingle | Joanna Lach Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons Water chloramphenicol activated carbon adsorption |
| title | Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons |
| title_full | Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons |
| title_fullStr | Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons |
| title_full_unstemmed | Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons |
| title_short | Adsorption of Chloramphenicol on Commercial and Modified Activated Carbons |
| title_sort | adsorption of chloramphenicol on commercial and modified activated carbons |
| topic | chloramphenicol activated carbon adsorption |
| url | https://www.mdpi.com/2073-4441/11/6/1141 |
| work_keys_str_mv | AT joannalach adsorptionofchloramphenicoloncommercialandmodifiedactivatedcarbons |