| 酸活化对膨润土比表面积和孔径的影响研究 |
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| 引用本文： | 温淑瑶,马占青,马毅杰.酸活化对膨润土比表面积和孔径的影响研究[J].实验技术与管理,2011(10):44-46. |
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| 作者姓名： | 温淑瑶 马占青 马毅杰 |
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| 作者单位： | 北京师范大学地理学与遥感科学学院;杭州职业技术学院化学工程系;中国科学院南京土壤研究所; |
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| 基金项目： | 国家基础科学人才培养基金项目资助(J0630532) |
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| 摘 要： | 分别用质量分数为5%、10%、15%、20%、25%和30%的硫酸溶液对黑山膨润土进行酸化改性,用乙二醇乙醚吸附法和氮气吸附法对黑山膨润土及其酸化土的比表面积和孔体积进行分析。结果表明:膨润土酸化改性后,随着硫酸质量分数的增加,外表面积增加不明显,内表面积及总表面积减小;半径大于1nm的孔的体积明显增加,半径小于1nm的孔的体积逐渐减小直至为0。可见,本实验条件下膨润土酸化改性后性质的变化,并不是主要由表面积增加引起的,而是由有效孔(半径>1nm)的大量增加引起的。
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| 关 键 词： | 膨润土 酸活化 比表面积 孔径 |
Research on influence of acid modification upon specific surface area and hole radius of bentonite |
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| Wen shuyao,Ma Zhanqing,Ma Yijie.Research on influence of acid modification upon specific surface area and hole radius of bentonite[J].Experimental Technology and Management,2011(10):44-46. |
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| Authors: | Wen shuyao Ma Zhanqing Ma Yijie |
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| Institution: | Wen shuyao1,Ma Zhanqing2,Ma Yijie3 (1.School of Geography.Beijing Normal University,Beijing 100875,China,2.Department of Chemical Engineering,Hangzhou Vocation and Technical College,Hangzhou 310018,3.Nanjing Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China) |
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| Abstract: | Heshan bentonite is used to react to different concentration sulphuric acid(5%,10%,15%,20%,25%,30%) respectively.Specific surface area and the volume of holes of bentonite and acid-activated bentonite have been studied with adsorption method of ethylene glycol monoethyl ether and adsorption method of nitrogen.After acid modification,along with the increase of concentration of sulphuric acid,external surface area of bentonite does not increase obviously,internal surface area and total surface area decrease,v... |
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| Keywords: | bentonite acid modification specific surface area hole radius |
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