Preparation of mesoporous silica from coal slag and its metal ion adsorption behavior
| Autor: | Jianbin Zhang, Xianlong Meng, Zhaojun Wu, Xinying Zhang, Yu Wu, Huihu Shi, Xuefang Li |
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| Rok vydání: | 2019 |
| Předmět: |
Chemistry
General Chemical Engineering Inorganic chemistry Enthalpy Langmuir adsorption model 02 engineering and technology General Chemistry Mesoporous silica 021001 nanoscience & nanotechnology Endothermic process Metal symbols.namesake Adsorption 020401 chemical engineering visual_art Specific surface area symbols visual_art.visual_art_medium Leaching (metallurgy) 0204 chemical engineering 0210 nano-technology |
| Zdroj: | Korean Journal of Chemical Engineering. 36:753-762 |
| ISSN: | 1975-7220 0256-1115 |
| DOI: | 10.1007/s11814-019-0261-7 |
| Popis: | A novel mesoporous silica (MS) with the high specific surface area up to 1,199 m2/g was prepared from coal slag by SO 3 2− leaching and hydrothermal synthesis. Its application in metal ion removal was explored using Pb2+, Cu2+, Co2+ and Cd2+ as the model ions. The effects of adsorption time, pH, initial metal ion concentration, adsorbent dosage and adsorption temperature on the metal ion adsorption behaviors of the as-prepared MS were systematically, and the maximum adsorption capacities were measured to be 55.76 mg·g−1, 33.49 mg·g−1, 24.29 mg·g−1 and 22.98 mg·g−l for Pb2+, Cu2+, Co2+ and Cd2+, respectively. The metal ion adsorption on the as-prepared MS followed pseudo-second-order kinetics, and the adsorption isotherm fitted the Langmuir isotherm model, indicating that the adsorption was spontaneous, endothermic and enthalpy driven. |
| Databáze: | OpenAIRE |
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