Application of mesopores copper hexacyanoferrate (II) nanomaterials for cesium adsorption
Mesopores of copper hexacyanoferrate (II) (M-CuHCF-II) nanomaterials used for the cesium (Cs+) removal were synthesized by the chemical coprecipitation method. M-CuHCF-II has a cubic structure (space group F-43m), a surface area of 12.80 m2/g, and a pore width of about 34.49 nm. At pH=6, the adsor...
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| Glavni autori: | , , |
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| Format: | Journal article |
| Jezik: | English |
| Izdano: |
Korean Society of Environmental Engineers
2024
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| Teme: | |
| Online pristup: | https://scholar.dlu.edu.vn/handle/123456789/3268 |
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| Thư viện lưu trữ: | Thư viện Trường Đại học Đà Lạt |
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| Sažetak: | Mesopores of copper hexacyanoferrate (II) (M-CuHCF-II) nanomaterials used for the cesium (Cs+) removal were synthesized by the chemical
coprecipitation method. M-CuHCF-II has a cubic structure (space group F-43m), a surface area of 12.80 m2/g, and a pore width of about 34.49
nm. At pH=6, the adsorption capacity of Cs+ ions by CuHCF-II reached the maximum within 15 minutes. Langmuir, Redlich–Peterson, and
Sips models are suitable to describe the adsorption of Cs+ ions by M-CuHF-II materials. The maximum absorption capacity of M-CuHCF-II
was determined at 318 K corresponding to the value of 197.72 mg g-1. The Gibbs free energy change (ΔG°) of Cs+ adsorption process with
ranging values from -37.47 to -40.74, and ΔH0 = -8.28 (kJ mol-1) at temperatures from 298–348 K. Na+, NH4+, Ca2+, and K+ ions in solution
affect the removal of Cs+ ions when they occur at high concentrations. M-CuHCF-II materials are easy to prepare, low-cost, have high adsorption
capacity for Cs+ ions, and are easy to apply. In addition, the adsorption mechanism of Cs+ ions by M-CuHCF-II is also proposed and discussed. |
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