Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentonite
The adsorption efficiency of a new hybrid clay adsorbent for polynuclear aromatic hydrocarbons (PAHs) is compared with known modified clay adsorbents. The new hybrid clay adsorbent (HYCA) showed far higher adsorption capacities for the adsorption of various PAH molecules compared with sodium dodecyl...
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| Format: | Article |
| Language: | English |
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Chemical Society of Ethiopia
2017-01-01
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| Series: | Bulletin of the Chemical Society of Ethiopia |
| Subjects: | |
| Online Access: | https://www.ajol.info/index.php/bcse/article/view/149948 |
| _version_ | 1818332709743755264 |
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| author | E. I. Unuabonah B. I. Olu-Owolabi L. Böhm R. A. Düring |
| author_facet | E. I. Unuabonah B. I. Olu-Owolabi L. Böhm R. A. Düring |
| author_sort | E. I. Unuabonah |
| collection | DOAJ |
| description | The adsorption efficiency of a new hybrid clay adsorbent for polynuclear aromatic hydrocarbons (PAHs) is compared with known modified clay adsorbents. The new hybrid clay adsorbent (HYCA) showed far higher adsorption capacities for the adsorption of various PAH molecules compared with sodium dodecyl sulfate modified and humic acid modified Bentonite clay adsorbents. With the new hybrid clay adsorbent (HYCA), the adsorption of some of the larger PAH molecules was complete in the first 1 h as compared with ≈ 62% and ≈ 76% observed for both humic acid modified and sodium dodecyl sulfate modified Bentonite clay adsorbents respectively. In 24 h adsorption of the PAHs was complete for all adsorbents with HYCA adsorbent showing better efficiency in the removal of the PAH molecules from aqueous solutions. No significant change was observed with increase in time up to 48 h. The adsorption was observed to be more spontaneous with HYCA adsorbent than with either modified Bentonite adsorbents. The enthalpy of adsorption did not follow any specific order and were not consistent for all PAH molecules considered. |
| first_indexed | 2024-12-13T13:40:03Z |
| format | Article |
| id | doaj.art-149e8f88810f4ccf95630b9e1380e325 |
| institution | Directory Open Access Journal |
| issn | 1011-3924 1726-801X |
| language | English |
| last_indexed | 2024-12-13T13:40:03Z |
| publishDate | 2017-01-01 |
| publisher | Chemical Society of Ethiopia |
| record_format | Article |
| series | Bulletin of the Chemical Society of Ethiopia |
| spelling | doaj.art-149e8f88810f4ccf95630b9e1380e3252022-12-21T23:43:36ZengChemical Society of EthiopiaBulletin of the Chemical Society of Ethiopia1011-39241726-801X2017-01-01303369376http://dx.doi.org/10.4314/bcse.v30i3.5Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentoniteE. I. UnuabonahB. I. Olu-OwolabiL. BöhmR. A. DüringThe adsorption efficiency of a new hybrid clay adsorbent for polynuclear aromatic hydrocarbons (PAHs) is compared with known modified clay adsorbents. The new hybrid clay adsorbent (HYCA) showed far higher adsorption capacities for the adsorption of various PAH molecules compared with sodium dodecyl sulfate modified and humic acid modified Bentonite clay adsorbents. With the new hybrid clay adsorbent (HYCA), the adsorption of some of the larger PAH molecules was complete in the first 1 h as compared with ≈ 62% and ≈ 76% observed for both humic acid modified and sodium dodecyl sulfate modified Bentonite clay adsorbents respectively. In 24 h adsorption of the PAHs was complete for all adsorbents with HYCA adsorbent showing better efficiency in the removal of the PAH molecules from aqueous solutions. No significant change was observed with increase in time up to 48 h. The adsorption was observed to be more spontaneous with HYCA adsorbent than with either modified Bentonite adsorbents. The enthalpy of adsorption did not follow any specific order and were not consistent for all PAH molecules considered.https://www.ajol.info/index.php/bcse/article/view/149948AdsorptionPolynuclear aromatic hydrocarbonsEnthalpyHybrid clayBentonite |
| spellingShingle | E. I. Unuabonah B. I. Olu-Owolabi L. Böhm R. A. Düring Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentonite Bulletin of the Chemical Society of Ethiopia Adsorption Polynuclear aromatic hydrocarbons Enthalpy Hybrid clay Bentonite |
| title | Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentonite |
| title_full | Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentonite |
| title_fullStr | Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentonite |
| title_full_unstemmed | Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentonite |
| title_short | Adsorption of polynuclear aromatic hydrocarbons from aqueous solution: Agrowaste-modified kaolinite vs surfactant modified bentonite |
| title_sort | adsorption of polynuclear aromatic hydrocarbons from aqueous solution agrowaste modified kaolinite vs surfactant modified bentonite |
| topic | Adsorption Polynuclear aromatic hydrocarbons Enthalpy Hybrid clay Bentonite |
| url | https://www.ajol.info/index.php/bcse/article/view/149948 |
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