Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite
In the present work, the modified bentonites were prepared by the modification of bentonite with cetyltrimethylammonium bromide (CTAB), both cetyltrimethylammonium bromide and hydroxy-Fe cations and both cetyltrimethylammonium bromide and hydroxy-Al cations. X-ray diffraction (XRD), thermal analysis...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2020/1504805 |
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| author | Nguyen Le My Linh Tran Duong Hoang Van Duc Nguyen Thi Anh Thu Pham Khac Lieu Nguyen Van Hung Le Thi Hoa Dinh Quang Khieu |
| author_facet | Nguyen Le My Linh Tran Duong Hoang Van Duc Nguyen Thi Anh Thu Pham Khac Lieu Nguyen Van Hung Le Thi Hoa Dinh Quang Khieu |
| author_sort | Nguyen Le My Linh |
| collection | DOAJ |
| description | In the present work, the modified bentonites were prepared by the modification of bentonite with cetyltrimethylammonium bromide (CTAB), both cetyltrimethylammonium bromide and hydroxy-Fe cations and both cetyltrimethylammonium bromide and hydroxy-Al cations. X-ray diffraction (XRD), thermal analysis (TG-DTA), infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and nitrogen adsorption/desorption isotherms were utilized to characterize the resultant modified bentonites. The modified bentonites were employed for the removal of phenol red dye from aqueous solution. Phenol red adsorption agreed well with the pseudo-second-order kinetic model. The equilibrium data were analyzed on the basis of various adsorption isotherm models, namely, Langmuir, Freundlich, and Dubinin‒Radushkevich models. The highest monolayer adsorption capacity of phenol red at 30°C derived from the Langmuir equation was 166.7 mg·g−1, 125.0 mg·g−1, and 100.0 mg·g−1 for CTAB‒bentonite, Al‒CTAB‒bentonite, and Fe‒CTAB‒bentonite, respectively. Different thermodynamic parameters were calculated, and it was concluded that the adsorption was spontaneous (∆G° < 0) and endothermic (∆H° > 0), with increased entropy (∆S° > 0) in all the investigated temperature ranges. |
| format | Article |
| id | doaj-art-14cd659d88e94d7086df83d5335528cb |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-14cd659d88e94d7086df83d5335528cb2025-02-03T01:24:56ZengWileyJournal of Chemistry2090-90632090-90712020-01-01202010.1155/2020/15048051504805Phenol Red Adsorption from Aqueous Solution on the Modified BentoniteNguyen Le My Linh0Tran Duong1Hoang Van Duc2Nguyen Thi Anh Thu3Pham Khac Lieu4Nguyen Van Hung5Le Thi Hoa6Dinh Quang Khieu7University of Education, Hue University, Hue 49000, VietnamUniversity of Education, Hue University, Hue 49000, VietnamUniversity of Education, Hue University, Hue 49000, VietnamUniversity of Education, Hue University, Hue 49000, VietnamHue University, Hue 49000, VietnamCenter for Chemistry Analysis, Dong Thap University, Cao Lãnh 81000, VietnamUniversity of Sciences, Hue University, Hue 49000, VietnamUniversity of Sciences, Hue University, Hue 49000, VietnamIn the present work, the modified bentonites were prepared by the modification of bentonite with cetyltrimethylammonium bromide (CTAB), both cetyltrimethylammonium bromide and hydroxy-Fe cations and both cetyltrimethylammonium bromide and hydroxy-Al cations. X-ray diffraction (XRD), thermal analysis (TG-DTA), infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and nitrogen adsorption/desorption isotherms were utilized to characterize the resultant modified bentonites. The modified bentonites were employed for the removal of phenol red dye from aqueous solution. Phenol red adsorption agreed well with the pseudo-second-order kinetic model. The equilibrium data were analyzed on the basis of various adsorption isotherm models, namely, Langmuir, Freundlich, and Dubinin‒Radushkevich models. The highest monolayer adsorption capacity of phenol red at 30°C derived from the Langmuir equation was 166.7 mg·g−1, 125.0 mg·g−1, and 100.0 mg·g−1 for CTAB‒bentonite, Al‒CTAB‒bentonite, and Fe‒CTAB‒bentonite, respectively. Different thermodynamic parameters were calculated, and it was concluded that the adsorption was spontaneous (∆G° < 0) and endothermic (∆H° > 0), with increased entropy (∆S° > 0) in all the investigated temperature ranges.http://dx.doi.org/10.1155/2020/1504805 |
| spellingShingle | Nguyen Le My Linh Tran Duong Hoang Van Duc Nguyen Thi Anh Thu Pham Khac Lieu Nguyen Van Hung Le Thi Hoa Dinh Quang Khieu Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite Journal of Chemistry |
| title | Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite |
| title_full | Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite |
| title_fullStr | Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite |
| title_full_unstemmed | Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite |
| title_short | Phenol Red Adsorption from Aqueous Solution on the Modified Bentonite |
| title_sort | phenol red adsorption from aqueous solution on the modified bentonite |
| url | http://dx.doi.org/10.1155/2020/1504805 |
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