Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions
This paper reports the use of powdered activated carbon (PAC) and raw coal fly ash (RFA) in the removal of eosin dye from aqueous solution in batch processes. Operational parameters such as contact time, initial dye concentration, pH and temperature were investigated. Adsorption equilibrium was esta...
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| Format: | Article |
| Language: | English |
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Chemical Society of Ethiopia
2013-05-01
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| Series: | Bulletin of the Chemical Society of Ethiopia |
| Subjects: | |
| Online Access: | http://www.ajol.info/index.php/bcse/article/view/88811 |
| _version_ | 1828841441763262464 |
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| author | V.O. Njoku O.A. Olusegun O.S. Bello |
| author_facet | V.O. Njoku O.A. Olusegun O.S. Bello |
| author_sort | V.O. Njoku |
| collection | DOAJ |
| description | This paper reports the use of powdered activated carbon (PAC) and raw coal fly ash (RFA) in the removal of eosin dye from aqueous solution in batch processes. Operational parameters such as contact time, initial dye concentration, pH and temperature were investigated. Adsorption equilibrium was established in 120 min for the two adsorbents. Langmuir and Freundlich isotherms were used to fit the adsorption data. Langmuir model gave the best fit in both cases. The adsorption capacities of PAC and RFA were found to be 62.28 mg/g and 43.48 mg/g, respectively. The highest percentage of eosin dye removal for both PAC (98%) and RFA (90%) was observed at pH 2. Pseudo first-order and pseudo second-order kinetic models were used to fit the adsorption data. Pseudo second-order kinetic model gave the best description of the adsorption of eosin dye onto the two adsorbents. Thermodynamic parameters, ΔH<sup>0</sup>, ΔS<sup>0</sup> and ΔG<sup>0</sup> confirmed the physical nature, spontaneity and the endothermic nature of the adsorption process. A regeneration technique and a process calculation for evaluating the adsorbent dose required were carried out. This study has shown that RFA is a good alternative adsorbent in the removal of eosin dye from aqueous solution. |
| first_indexed | 2024-12-12T20:03:34Z |
| format | Article |
| id | doaj.art-3470d6c7509e4c0384fa41c71fa835a7 |
| institution | Directory Open Access Journal |
| issn | 1011-3924 1726-801X |
| language | English |
| last_indexed | 2024-12-12T20:03:34Z |
| publishDate | 2013-05-01 |
| publisher | Chemical Society of Ethiopia |
| record_format | Article |
| series | Bulletin of the Chemical Society of Ethiopia |
| spelling | doaj.art-3470d6c7509e4c0384fa41c71fa835a72022-12-22T00:13:41ZengChemical Society of EthiopiaBulletin of the Chemical Society of Ethiopia1011-39241726-801X2013-05-01272191204http://dx.doi.org/10.4314/bcse.v27i2.4Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutionsV.O. NjokuO.A. OlusegunO.S. BelloThis paper reports the use of powdered activated carbon (PAC) and raw coal fly ash (RFA) in the removal of eosin dye from aqueous solution in batch processes. Operational parameters such as contact time, initial dye concentration, pH and temperature were investigated. Adsorption equilibrium was established in 120 min for the two adsorbents. Langmuir and Freundlich isotherms were used to fit the adsorption data. Langmuir model gave the best fit in both cases. The adsorption capacities of PAC and RFA were found to be 62.28 mg/g and 43.48 mg/g, respectively. The highest percentage of eosin dye removal for both PAC (98%) and RFA (90%) was observed at pH 2. Pseudo first-order and pseudo second-order kinetic models were used to fit the adsorption data. Pseudo second-order kinetic model gave the best description of the adsorption of eosin dye onto the two adsorbents. Thermodynamic parameters, ΔH<sup>0</sup>, ΔS<sup>0</sup> and ΔG<sup>0</sup> confirmed the physical nature, spontaneity and the endothermic nature of the adsorption process. A regeneration technique and a process calculation for evaluating the adsorbent dose required were carried out. This study has shown that RFA is a good alternative adsorbent in the removal of eosin dye from aqueous solution.http://www.ajol.info/index.php/bcse/article/view/88811Eosin dyeFly ashIsothermsThermodynamic parametersEndothermic |
| spellingShingle | V.O. Njoku O.A. Olusegun O.S. Bello Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions Bulletin of the Chemical Society of Ethiopia Eosin dye Fly ash Isotherms Thermodynamic parameters Endothermic |
| title | Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions |
| title_full | Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions |
| title_fullStr | Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions |
| title_full_unstemmed | Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions |
| title_short | Fly ash: An alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions |
| title_sort | fly ash an alternative to powdered activated carbon for the removal of eosin dye from aqueous solutions |
| topic | Eosin dye Fly ash Isotherms Thermodynamic parameters Endothermic |
| url | http://www.ajol.info/index.php/bcse/article/view/88811 |
| work_keys_str_mv | AT vonjoku flyashanalternativetopowderedactivatedcarbonfortheremovalofeosindyefromaqueoussolutions AT oaolusegun flyashanalternativetopowderedactivatedcarbonfortheremovalofeosindyefromaqueoussolutions AT osbello flyashanalternativetopowderedactivatedcarbonfortheremovalofeosindyefromaqueoussolutions |