| 原料粒度对粉煤灰成型吸附剂结构和性能的影响(英文) |
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| 引用本文： | 刘转年,刘源.原料粒度对粉煤灰成型吸附剂结构和性能的影响(英文)[J].中国化学工程学报,2015,23(1):290-295. |
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| 作者姓名： | 刘转年 刘源 |
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| 作者单位： | 1.College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China;2.School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China(51278418);the Natural Science Basic Research Plan in Shaanxi Province of China(2013K11-10) |
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| 摘 要： | In this paper, different particle sizes of coal fly ash FA-R (D50=15.75μm), FA-A (D50=3.61μm) and FA-B (D50=1.73μm) were treated with NaOH solution to prepare the forming adsorbents FFA-R, FFA-A and FFA-B. The structure and adsorption properties of the forming adsorbents for methylene blue (MB) from aqueous solu-tion were examined. The results showed that the specific surface areas and adsorption capacities of the forming adsorbent for MB increased with decreasing particle size of raw coal fly ashes. The adsorption kinetic data of MB on FFA-R, FFA-A and FFA-B fitted the second-order kinetic model very wel with the rate constants (k2) of 3.15 × 10?2, 3.84 × 10?2 and 6.27 × 10?2 g·mg?1·min?1, respectively. The adsorption process was not only con-trol ed by intra-particle diffusion. The isotherms of MB on FFA-R, FFA-A and FFA-B can be described by the Lang-muir isotherm and the Freundlich isotherm, and the adsorption processes were spontaneous and exothermic. ? 2014 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. Al rights reserved.
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| 关 键 词： | Coal fly ash Forming adsorbent Particle size Structure Methylene blue |
| 收稿时间： | 2013-04-15 |
Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash |
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| Zhuannian Liu;Yuan Liu.Structure and properties of forming adsorbents prepared from different particle sizes of coal fly ash[J].Chinese Journal of Chemical Engineering,2015,23(1):290-295. |
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| Authors: | Zhuannian Liu;Yuan Liu |
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| Affiliation: | 1.College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China;2.School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China |
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| Abstract: | In this paper, different particle sizes of coal fly ash FA-R (D50 = 15.75 μm), FA-A (D50 = 3.61 μm) and FA-B (D50= 1.73 μm) were treated with NaOH solution to prepare the forming adsorbents FFA-R, FFA-A and FFA-B. The structure and adsorption properties of the forming adsorbents for methylene blue (MB) from aqueous solution were examined. The results showed that the specific surface areas and adsorption capacities of the forming adsorbent for MB increased with decreasing particle size of raw coal fly ashes. The adsorption kinetic data of MB on FFA-R, FFA-A and FFA-B fitted the second-order kinetic model very well with the rate constants (k2) of 3.15 × 10-2, 3.84×10-2 and 6.27 × 10-2 g·mg-1·min-1, respectively. The adsorption processwas not only controlled by intra-particle diffusion. The isotherms of MB on FFA-R, FFA-A and FFA-B can be described by the Langmuir isotherm and the Freundlich isotherm, and the adsorption processes were spontaneous and exothermic. |
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| Keywords: | Coal fly ash Forming adsorbent Particle size Structure Methylene blue |
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