朝阳某钙基膨润土有机改性及吸附性能研究
发布时间：2019-02-15 19:03
【摘要】：以朝阳某天然钙基膨润土为原料,以十二烷基三甲基溴化铵为改性剂,通过超声辅助法制备有机改性膨润土,利用X射线衍射分析(XRD)、红外吸收光谱(FTIR)、比表面积(BET)和zeta电位等技术手段对改性膨润土进行表征,研究改性膨润土对甲基橙和苯酚的吸附性能,考察反应时间、污染物初始质量浓度及pH值对吸附效果的影响规律。结果表明,改性剂成功插入钙基膨润土层间,致其层间距增大,zeta电位升高;改性膨润土对甲基橙和苯酚的吸附行为均符合准二级动力学和Langmuir等温吸附模型,饱和吸附量分别为197.63 mg/g和10.34 mg/g,吸附机理以物理吸附和电荷吸附为主。
[Abstract]:Organic modified bentonite was prepared from a natural calcium bentonite in Chaoyang by ultrasonic assisted method with dodecyl trimethylammonium bromide as modifier. (XRD), infrared absorption spectrum (FTIR), was analyzed by X-ray diffraction. The surface area of modified bentonite was characterized by (BET) and zeta potential. The adsorption properties of modified bentonite for methyl orange and phenol were studied. The effects of reaction time, initial concentration of pollutants and pH value on the adsorption were investigated. The results showed that the interlayer of calcium bentonite was successfully inserted into the modifier, which led to the increase of the interlayer spacing and the increase of zeta potential. The adsorption behavior of modified bentonite for methyl orange and phenol was in accordance with the quasi-second-order kinetics and Langmuir isothermal adsorption model. The saturated adsorption amounts of 197.63 mg/g and 10.34 mg/g, were mainly physical adsorption and charge adsorption.
【作者单位】： 中国矿业大学(北京)化学与环境工程学院;
【基金】：国家自然科学基金(51504263) 中央高校基本科研业务费资助项目(2015QH01)
【分类号】：O647.3;X703
本文编号：2423638
[Abstract]:Organic modified bentonite was prepared from a natural calcium bentonite in Chaoyang by ultrasonic assisted method with dodecyl trimethylammonium bromide as modifier. (XRD), infrared absorption spectrum (FTIR), was analyzed by X-ray diffraction. The surface area of modified bentonite was characterized by (BET) and zeta potential. The adsorption properties of modified bentonite for methyl orange and phenol were studied. The effects of reaction time, initial concentration of pollutants and pH value on the adsorption were investigated. The results showed that the interlayer of calcium bentonite was successfully inserted into the modifier, which led to the increase of the interlayer spacing and the increase of zeta potential. The adsorption behavior of modified bentonite for methyl orange and phenol was in accordance with the quasi-second-order kinetics and Langmuir isothermal adsorption model. The saturated adsorption amounts of 197.63 mg/g and 10.34 mg/g, were mainly physical adsorption and charge adsorption.
【作者单位】： 中国矿业大学(北京)化学与环境工程学院;
【基金】：国家自然科学基金(51504263) 中央高校基本科研业务费资助项目(2015QH01)
【分类号】：O647.3;X703
【相似文献】
相关期刊论文 前6条
1 崔迎春;钙基膨润土人工升级方法研究[J];西部探矿工程;1995年03期
2 马小隆,刘晓明,宋吉勇;钙基膨润土的改性方法及对Pb~(2+)吸附性能的研究[J];有色矿冶;2005年04期
3 刘晓东,吕宪俊;钙基膨润土酸法活化工艺的研究[J];矿业快报;2003年11期
4 章丽燕;陈曦;丁马太;;不同前驱体有机改性溶胶-凝胶膜对氨响应的研究[J];功能材料;2006年08期
5 刘峥;Fe_3O_4微粒表面有机改性及其应用研究[J];化工技术与开发;2004年03期
6 彭旭慧;乐园;卞曙光;李沃源;毋伟;杨旷;陈建峰;;TiO_2的有机改性及其电泳性能[J];北京化工大学学报(自然科学版);2006年03期
相关会议论文 前1条
1 韦藤幼;李琪琳;吴璇;童张法;;碱性钙基膨润土的制备及其表征[A];第三届全国化学工程与生物化工年会论文摘要集（下）[C];2006年
相关硕士学位论文 前1条
1 杨欣洁;新型磁性复合有机海泡石对双酚A的吸附试验研究[D];湖南大学;2015年
，本文编号：2423638
本文链接：https://www.wllwen.com/shengtaihuanjingbaohulunwen/2423638.html
