酸化蒙脱石对挥发性有机物的吸附研究
Preparation and Characterization of Acid Activated Montmorillonites for VOCs Removal
查看参考文献33篇
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文摘
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通过对蒙脱石矿物表面与结构改性优化处理,增大其比表面积,扩大有效吸附孔洞,增强表面疏水性能,从而提高其对挥发性有机物(VOCs)的吸附能力。本研究通过酸化法对蒙脱石(Mt)进行活化,在固定活化的温度、时间、固液比和搅拌速率的条件下,探讨不同浓度硫酸活化对Mt结构的影响,并研究相应酸化产物对作为指示VOCs的甲苯、二氯甲烷的吸附效果,进而推断酸活化产物与VOCs的构-效关系。结果表明,Mt经过酸活化后,其BET比表面积达到373.8 m~2/g,孔体积为0.52 cm~3/g。酸活化产物对甲苯、二氯甲烷的饱和吸附容量最高分别达到156.6、119.7 mg/g,相比原土的吸附量分别提高了1.46和1.62倍。吸附容量与吸附剂的BET比表面积和孔体积并非简单线性正相关关系,VOC分子的尺寸也有一定的影响。 |
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其他语种文摘
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Montmorillonite (Mt) was activated by acid treatment with different concentrations of sulfuric acid, under the condition with a fixed activation temperature, time, solid-liquid ratio and stirring speed. Acid activation resulted in the high BET specific surface area (ca.373.8 m~2/g) and high pore volume (ca.0.52 cm~3/g). The saturation capacity of acid activation product for toluene and dichloromethane are 156.6 and 119.7 mg/g, which were 1.46 and 1.62 times larger than those of raw Mt, respectively. Adsorption capacity is not positively correlated with BET specific surface area and pore volume, while the size of the VOC molecules has a certain effect on montmorillonite's adsorption capacity. |
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来源
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矿物学报
,2015,35(3):281-287 【核心库】
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DOI
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10.16461/j.cnki.1000-4734.2015.03.001
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关键词
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蒙脱石
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酸化
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吸附
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挥发性有机物
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地址
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中国科学院广州地球化学研究所, 中国科学院矿物学与成矿学重点实验室;;广东省矿物物理与材料研究开发重点实验室, 广东, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4734 |
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学科
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环境污染及其防治 |
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基金
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国家自然科学基金
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广东省自然科学基金研究团队项目
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中国科技部国家重点技术研究与开发项目
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中国科学院战略重点支持研究项目
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文献收藏号
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CSCD:5486023
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