Application of Mesopore-Ac tivated Red Mud for Phosphorus Adsorption
In this paper, the mesopore-activated red mud (M-ARM) was prepared by treating red mud (RM) with acid under an ultrasonic batch and through heat treatment at 750 C. The surface area and adsorption average pore width of M-ARM were calculated and obtained values of 13.408 m2 g-1 and 25.160 nm, respect...
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| Những tác giả chính: | , |
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| 格式: | Journal article |
| 语言: | English |
| 出版: |
2023
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| 主题: | |
| 在线阅读: | https://scholar.dlu.edu.vn/handle/123456789/2055 https://doi.org/10.1155/2022/8351796 |
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| Thư viện lưu trữ: | Thư viện Trường Đại học Đà Lạt |
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| 总结: | In this paper, the mesopore-activated red mud (M-ARM) was prepared by treating red mud (RM) with acid under an ultrasonic batch and through heat treatment at 750 C. The surface area and adsorption average pore width of M-ARM were calculated and obtained values of 13.408 m2 g-1 and 25.160 nm, respectively. Therefore, the maximum adsorption capacity of M-ARM for phosphorus was 200: 85 ± 1: 66 mg g− 1 at 318 K and pH = 5. At a low initial concentration (75 mg L-1),
the phosphorus removal capacity by M-ARM material was up to 97:09 ± 0:15 % at 313 K. With the temperature scales varying from 298 to 313 K, the values of Gibbs free energy change (Δ G ° ) were negative and also vary from -37.47 to -36.68. The phosphorus adsorption process in an aqueous solution is spontaneous, and this adsorption process was exothermic with enthalpy change ΔHo = −14:36. From the results of investigations and calculations of thermodynamic values, kinetics, and
adsorption capacity of materials, we can confirm that the materials in this study had a low-cost and potential material for applications to treat phosphorus-contaminated water. In addition, the adsorption kinetics of this material for phosphorus were also studied and discussed. |
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