| 微波辐照活性炭改性机理研究 |
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| 引用本文： | 曹晓强,陆洪省,黄学敏.微波辐照活性炭改性机理研究[J].环境科学与技术,2011,34(6):89-91,97. |
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| 作者姓名： | 曹晓强 陆洪省 黄学敏 |
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| 作者单位： | 1. 山东科技大学化学与环境工程学院,山东青岛,266510
2. 西安建筑科技大学环境与市政工程学院,陕西西安,710055 |
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| 基金项目： | 山东科技大学“春蕾”计划项目(2009BWZ004); 陕西省教育厅专项科研计划项目(06JK269) |
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| 摘 要： | 利用微波辐照作为改性手段,在450℃、N2气氛下对椰壳基颗粒活性炭进行了改性研究,测定了活性炭改性前后对甲苯的吸附性能.结果表明:微波改性后,单位质量活性炭(1 g)对甲苯的吸附能力由182 mg提高到193 mg;试验中,吸附床层的穿透时间由2.5 h提高至35 h.改性活性炭的表面碱性官能团含量、比表面积、孔容积、...
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| 关 键 词： | 微波辐照 颗粒活性炭 改性 吸附 机理 |
Mechanism of Activated Carbon Modified by Microwave Irradiation |
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| CAO Xiao-qiang,LU Hong-sheng,HUANG Xue-min.Mechanism of Activated Carbon Modified by Microwave Irradiation[J].Environmental Science and Technology,2011,34(6):89-91,97. |
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| Authors: | CAO Xiao-qiang LU Hong-sheng HUANG Xue-min |
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| Institution: | CAO Xiao-qiang1,LU Hong-sheng1,HUANG Xue-min2(1.School of Chemistry and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266510,China,2.School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China) |
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| Abstract: | Microwave irradiation technology was used to modify coconut shell-based granular activated carbon(GAC)in N2 at 450 ℃.The modified and unmodified GAC adsorption capacity for toluene was measured.Results indicated that adsorption capacity of 1 g modified GAC to toluene can be improved from 182 mg to 193 mg,and breakthrough time of adsorption bed can be prolonged from 2.5 h to 3.5 h.After modification,alkali functional group content,specific surface area,iodine number and surface morphology of modified GAC were enhanced,but acid functional group content of modified GAC was less than unmodified GAC.Analysis of results and SEM photos indicated that mechanism of GAC modified by microwave irradiation can be explained from two aspects,including cleaning of holes in GAC by microwave heat enhances its physical adsorption capacity and plays a leading role while increase of alkali functional group on GAC surface by reducing atmosphere enhances its chemical adsorption capacity. |
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| Keywords: | microwave irradiation granular activated carbon(GAC) modification adsorption mechanism |
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