...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemical engineering journal >Enhanced removal of bisphenol A from aqueous solution by organomontmorillonites modified with novel Gemini pyridinium surfactants containing long alkyl chain
【24h】

Enhanced removal of bisphenol A from aqueous solution by organomontmorillonites modified with novel Gemini pyridinium surfactants containing long alkyl chain

机译：新型含长烷基链的Gemini吡啶鎓表面活性剂改性的有机蒙脱土增强了水溶液中双酚A的去除

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To utilize the it-it interaction and the hydrophobic affinity of modifiers with long alkyl chain in the interlayer of montmorillonites for effective removal of bisphenol A (BPA) from aqueous solution, organo-montmorillonites modified with novel Gemini pyridinium surfactants containing both the aromatic ring and long alkyl chain, 1,1'-didodecy1-4,4'-trimethylene bispyridiniurn bromide (BPy-12-3-12) and 1,1'-dihexadecy1-4,4'-trimethylene bispyridinium bromide (BPy-16-3-16) were designed and prepared in this study. The raw montmorillonite and organo-montmorillonites (BPy-12-3-12-Mt and BPy-16-3-16-Mt) were specified with X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), thermogravimetric analysis (TGA). The main effect factors which played a significant role in removal of BPA from aqueous solution, such as the amount of modifier, alkyl chain length, contact time and solution pH were investigated in detail. The experimental results indicated that the maximum adsorption capacities of BPA obtained from Langmuir isotherms were 222.2 mg/g for BPy-12-3-12-Mt and 208.3 mg/g for BPy-16-3-16-Mt at pH 6, suggesting that organoclays with shorter alkyl chain presented higher affinity for BPA. This may be due to the combined contribution of pi-pi interaction and hydrophobic interaction, especially pi-pi interaction played a dominated role in BPA adsorption. Additionally, the experimental data were best fitted with the Langmuir isotherm model. The obtained kinetics data for BPA adsorption onto the organoclays were described well by the pseudo-second-order model. Thermodynamic parameters demonstrated that the adsorption process of BPA was spontaneous and exothermic in nature. (C) 2015 Elsevier B.V. All rights reserved.
机译：为了利用蒙脱石中间层中长烷基链的改性剂的it-it相互作用和疏水亲和力来有效地从水溶液中去除双酚A（BPA），用新型的含有芳香环和芳烃的Gemini吡啶鎓表面活性剂改性的有机蒙脱土长烷基链，1,1'-双十二烷基1-4,4'-三亚甲基双吡啶溴化物（BPy-12-3-12）和1,1'-二十六烷基1-4,4'-三亚甲基双吡啶鎓溴化物（BPy-16-3 -16）是在这项研究中设计和准备的。通过X射线衍射（XRD），傅立叶变换红外（FTIR）光谱，扫描电子显微镜对原始蒙脱土和有机蒙脱土（BPy-12-3-12-Mt和BPy-16-3-16-Mt）进行了指定（SEM），热重分析（TGA）。详细研究了影响水溶液中双酚A去除的主要影响因素，如改性剂的用量，烷基链长，接触时间和溶液pH值。实验结果表明，在pH 6下，Langmuir等温线获得的BPA对BPy-12-3-12-Mt的最大吸附容量为222.2 mg / g，对BPy-16-3-16-Mt的最大吸附容量为208.3 mg / g。烷基链较短的有机粘土对BPA的亲和力更高。这可能是由于pi-pi相互作用和疏水相互作用的共同作用，尤其是pi-pi相互作用在BPA吸附中起着主导作用。此外，实验数据最适合Langmuir等温线模型。通过拟二级模型很好地描述了获得的BPA吸附到有机粘土上的动力学数据。热力学参数表明，BPA的吸附过程是自然的，并且是放热的。 （C）2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号