| 疏水性二氧化硅气凝胶吸附水中微量苯酚和甲醛的研究 |
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| 引用本文： | 刘善云,王涛. 疏水性二氧化硅气凝胶吸附水中微量苯酚和甲醛的研究[J]. 离子交换与吸附, 2009, 25(4) |
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| 作者姓名： | 刘善云 王涛 |
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| 作者单位： | 化学工程国家重点实验室,清华大学化学工程系,北京,100084;化学工程国家重点实验室,清华大学化学工程系,北京,100084 |
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| 摘 要： | 气凝胶是一种新型纳米多孔非晶材料,其密度低、比表面积大、孔隙率高,可以作为吸附剂.本文研究了稻壳灰为硅源制成的合甲基的疏水性二氧化硅气凝胶对水中微量苯酚和甲醛的吸附性能.结果表明,疏水性气凝胶对水中微量苯酚和甲醛具有一定的吸附能力,实验中对苯酚的吸附容量是1.93mg/g,要大于对甲醛的吸附容量0.92mg/g;增大气凝胶的疏水化程度可以增加其对水中微量苯酚和甲醛的平衡吸附容量;苯酚的吸附平衡等温曲线符合Langmuir和Freundlich方程,甲醛的吸附平衡等温曲线符合Freundlich方程.
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| 关 键 词： | 疏水性气凝胶 苯酚 甲醛 吸附 |
ADSORPTION OF TRACE PHENOL AND FORMALDEHYDE IN WATER WITH HYDROPHOBIC SILICA AEROGEL |
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| LIU Shanyun,WANG Tao. ADSORPTION OF TRACE PHENOL AND FORMALDEHYDE IN WATER WITH HYDROPHOBIC SILICA AEROGEL[J]. Ion Exchange and Adsorption, 2009, 25(4) |
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| Authors: | LIU Shanyun WANG Tao |
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| Affiliation: | LIU Shanyun WANG Tao State Key Lab of Chemical Engineering,Department of Chemical Engineering Tsinghua University,Beijing 100084,China |
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| Abstract: | Silica aerogel,due to its properties of highly porous,low density,high surface area and nano-size pores,has potential applications in adsorption. The adsorption of trace phenol and formaldehyde in water on a hydrophobic silica aerogel was investigated. The effects of on the adsorption of the temperature,the hydrophobility of the aerogel were studied. The adsorption equilibrium characteristics were determined. The adsorption capacity for phenol is 1.93mg/g,which is higher than 0.92mg/g for formaldehyde. Incr... |
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| Keywords: | Hydrophobic aerogel Phenol Formaldehyde Adsorption. |
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