High-surface-area activated red mud for efficient removal of methylene blue from wastewater
Red mud was activated by a digestion–precipitation method, resulting in a mesostructure with high surface area, and the activated red mud was further used as the adsorbent for methylene blue removal. The physicochemical properties of the resultant samples were characterized by X-ray diffraction, Fou...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2018-02-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/0263617416684348 |
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| _version_ | 1841561872050946048 |
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| author | Zhong-Pan Hu Ze-Min Gao Xinying Liu Zhong-Yong Yuan |
| author_facet | Zhong-Pan Hu Ze-Min Gao Xinying Liu Zhong-Yong Yuan |
| author_sort | Zhong-Pan Hu |
| collection | DOAJ |
| description | Red mud was activated by a digestion–precipitation method, resulting in a mesostructure with high surface area, and the activated red mud was further used as the adsorbent for methylene blue removal. The physicochemical properties of the resultant samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetry analysis, and nitrogen sorption techniques. Batch studies were measured to investigate the influence factors including adsorbent dosage, contact time, pH, and initial concentration. It was revealed that the activated red mud was highly efficient for removal of methylene blue. Adsorption experiments were found to be better achieved in faintly acidic and alkaline conditions, where the adsorption capacity of activated red mud and activated red mud-200 reached 232 and 274 mg/g at pH 7.0, respectively. Langmuir, Freundlich, Temkin isotherms, and pseudo-second-order kinetic model fitted the experimental data well, demonstrating an electrostatic interaction mechanism. |
| format | Article |
| id | doaj-art-9e27fad0f34043feb982c427d42f9504 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2018-02-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-9e27fad0f34043feb982c427d42f95042025-01-03T01:22:46ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382018-02-013610.1177/0263617416684348High-surface-area activated red mud for efficient removal of methylene blue from wastewaterZhong-Pan HuZe-Min GaoXinying LiuZhong-Yong YuanRed mud was activated by a digestion–precipitation method, resulting in a mesostructure with high surface area, and the activated red mud was further used as the adsorbent for methylene blue removal. The physicochemical properties of the resultant samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetry analysis, and nitrogen sorption techniques. Batch studies were measured to investigate the influence factors including adsorbent dosage, contact time, pH, and initial concentration. It was revealed that the activated red mud was highly efficient for removal of methylene blue. Adsorption experiments were found to be better achieved in faintly acidic and alkaline conditions, where the adsorption capacity of activated red mud and activated red mud-200 reached 232 and 274 mg/g at pH 7.0, respectively. Langmuir, Freundlich, Temkin isotherms, and pseudo-second-order kinetic model fitted the experimental data well, demonstrating an electrostatic interaction mechanism.https://doi.org/10.1177/0263617416684348 |
| spellingShingle | Zhong-Pan Hu Ze-Min Gao Xinying Liu Zhong-Yong Yuan High-surface-area activated red mud for efficient removal of methylene blue from wastewater Adsorption Science & Technology |
| title | High-surface-area activated red mud for efficient removal of methylene blue from wastewater |
| title_full | High-surface-area activated red mud for efficient removal of methylene blue from wastewater |
| title_fullStr | High-surface-area activated red mud for efficient removal of methylene blue from wastewater |
| title_full_unstemmed | High-surface-area activated red mud for efficient removal of methylene blue from wastewater |
| title_short | High-surface-area activated red mud for efficient removal of methylene blue from wastewater |
| title_sort | high surface area activated red mud for efficient removal of methylene blue from wastewater |
| url | https://doi.org/10.1177/0263617416684348 |
| work_keys_str_mv | AT zhongpanhu highsurfaceareaactivatedredmudforefficientremovalofmethylenebluefromwastewater AT zemingao highsurfaceareaactivatedredmudforefficientremovalofmethylenebluefromwastewater AT xinyingliu highsurfaceareaactivatedredmudforefficientremovalofmethylenebluefromwastewater AT zhongyongyuan highsurfaceareaactivatedredmudforefficientremovalofmethylenebluefromwastewater |