| 薏米壳生物炭的制备及其对Cr（Ⅵ）的吸附性能 |
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| 引用本文： | 谢妤,宋卫军.薏米壳生物炭的制备及其对Cr（Ⅵ）的吸附性能[J].化工环保,2017,36(5):525-532. |
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| 作者姓名： | 谢妤 宋卫军 |
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| 作者单位： | 1. 武夷学院 生态与资源工程学院,福建 武夷山 354300;2. 武夷学院 福建省生态产业绿色技术重点实验室,福建 武夷山 354300;3. 武夷学院 福建省竹材工程技术研究中心,福建 武夷山 354300 |
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| 基金项目： | 国家自然科学基金项目（51406141）; 福建省教育厅资助项目（JA15518）; 福建省大学生创新性实验项目（201510397047） |
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| 摘 要： | 采用限氧控温热分解法在不同温度下制备了薏米壳生物炭。研究了薏米壳生物炭对低浓度Cr（Ⅵ）的吸附性能及吸附机理。随碳化温度升高,薏米壳管状通道微孔结构逐渐显现,薏米壳生物炭表面芳香化程度增强。薏米壳生物炭对Cr（Ⅵ）的吸附行为采用Langmuir等温吸附模型吻合度更高,吸附属于单分子层化学吸附,吸附过程是自发的、熵增吸热反应,吸附过程遵循准二级吸附动力学模型,膜扩散和颗粒内扩散共同控制吸附过程。
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| 关 键 词： | 薏米壳 生物炭 铬 等温吸附模型 吸附动力学 颗粒内扩散 |
| 收稿时间： | 2017-01-13 |
Preparation of adlay husk biochar and its adsorption abilities to Cr（Ⅵ） |
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| Xie Yu,Song Weijun.Preparation of adlay husk biochar and its adsorption abilities to Cr（Ⅵ）[J].Environmental Protection of Chemical Industry,2017,36(5):525-532. |
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| Authors: | Xie Yu Song Weijun |
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| Affiliation: | 1. College of Ecological and Resources Engineering,Wuyi University,Wuyishan Fujian 354300,China;2. Fujian Provincial Key Laboratory of Eco-Industrial Green Technology,Wuyi University,Wuyishan Fujian 354300,China;3. Fujian Provincial Bamboo Engineering Technology Reserach Center,Wuyi University,Wuyishan Fujian 354300,China |
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| Abstract: | Biochar was made from adlay husk by the oxygen-limited thermal decomposition method under various temperatures. The adsorption ability to low-concentration Cr（Ⅵ）and the adsorption mechanism of adlay husk biochar were investigated. The results showed that the microporous structure of the tubular channel in adlay husk gradually appeared and the degree of aromaticity increased on the surface of the biochar with the increase of carbonization temperature. The Langmuir model was a feasible way to describe the adsorption behavior of Cr（Ⅵ）on adlay husk biochar. The adsorption process was carried out in the case of monolayer chemical adsorption,and it was a spontaneous,entropy increasing and endothermic reaction. The process followed the quasi secondary-order adsorption kinetic model. The adsorption rate was controlled by membrane diffusion and intraparticle diffusion. |
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| Keywords: | adlay husk biochar chromium isothermal adsorption model adsorption kinetics intraparticle diffusion |
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