| 酸碱连续改性木质活性炭及其吸附水中苯酚的动力学研究 |
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| 作者单位： | ;1.中国矿业大学环境与测绘学院;2.河南科技大学化工与制药学院 |
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| 摘 要： | 为了了解木质活性炭酸碱连续改性前后其表征变化及对水中苯酚的吸附机理,对市售木质活性炭进行先酸(12mol/L HCl)后碱(1mol/L NaOH)改性处理,测定了改性前后其表面灰分变化并进行了红外光谱(FTIR)分析,并对改性前后活性炭吸附水中苯酚的动力学进行了研究.结果表明,经酸碱改性后,活性炭表面灰分含量降低了37.5%;增加了活性炭表面官能团累积双键(=C=C=C=)和三键(-C≡C-)的数量;常温下,二级动力学模型能更好地模拟木质活性炭对水中苯酚的吸附过程.
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| 关 键 词： | 活性炭 苯酚 酸碱改性 吸附动力学 |
Study on Kinetics of Wooden Activated Carbon Modified by Acid and Alkali Continuously and Its Adsorption of Phenol in Water |
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| Affiliation: | ,School of Environment Science and Spatial Informatics,China University of Mining and Technology,School of Chemical Engineering and Pharmacy,Henan University of Science and Technology |
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| Abstract: | In order to understand adsorption mechanism of phenol in water with wooden activated carbon pre and post modified by acid and alkali,here dealt the wooden activated carbon with Hydrochloric acid(12 mol/L)and sodium hydrate(1mol/L)in turn.Then,mensurated the changes of activated carbon surface ash content and analysed by FR-IT,moreover,adsorption kinetics of phenol in water with wooden activated carbon pre and post modified was studied.The results showed that surface ash content of activated carbon reduced by 37.5% after modification;accumulated double bonds(=C=C=C=)and triple bonds(-C≡C-)of surface functional groups increased;under normal temperature,the second order kinetic can better describe the adsorption process of phenol in water with wooden activated carbon. |
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| Keywords: | activated carbon phenol modified by acid and alkali adsorption kinetics |
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