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Removal of methyl orange from aqueous solutions using a bentonite modified with a new gemini surfactant

机译:使用新型双子表面活性剂改性的膨润土从水溶液中去除甲基橙

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摘要

Glycol bis-N-cetylnicotinate dibromide (designated as GN16-1-16), a new cationic gemini surfactant, was prepared and used to modify bentonite. Bentonite modified with commercial cetyltrimethylammonium bromide (CTMAB) was also prepared for comparison purposes. FTIR and XRD revealed that both surfactants successfully intercalated into the bentonite layers. The basal spacing was 2.65 nm for GN-Bt (the bentonite modified by GN16-1-16) and 2.14 nm for C-Bt (the bentonite modified by CTMAB), indicating that GN16-1-16 was more efficient than CTMAB in expanding the interlayer space of montmorillonite. The optimum reaction time and temperature in the modification were 1 h and 30 ℃ for GN16-1-16 and 3 h and 70 ℃ for CTMAB. The GN16-1-16 reacted with bentonite faster than CTMAB. The decoloration rate and the COD removal of methyl orange (MO) solution were 99.02% and 90.62% for GN-Bt and 80.12% and 75.49% for C-BT. Therefore, GN-Bt was more effective than C-Bt to remove MO from aqueous solution. However, the efficiency of GN-Bt decreased rapidly at pH>6, which might be due to the hydrolysis of the ester groups in GN16-1-16 molecule under alkaline environment.
机译:制备了一种新的阳离子双子表面活性剂乙二醇双-N-鲸蜡烟酸酯二溴化物(命名为GN16-1-16),并将其用于改性膨润土。还准备了用商品十六烷基三甲基溴化铵(CTMAB)改性的膨润土。 FTIR和XRD表明两种表面活性剂均成功地插入到膨润土层中。 GN-Bt(由GN16-1-16改性的膨润土)的基础间距为2.65 nm,C-Bt(由CTMAB改性的膨润土)的基础间距为2.14 nm,表明GN16-1-16的膨胀效率比CTMAB高蒙脱石的夹层空间。修饰的最佳反应时间和最佳温度为GN16-1-16为1 h和30℃,而CTMAB为3 h和70℃。 GN16-1-16与膨润土的反应比CTMAB的反应快。 GN-Bt的脱色率和甲基橙(MO)溶液的COD去除率分别为GN-Bt和C-BT,分别为99.02%和90.62%和80.12%和75.49%。因此,GN-Bt比C-Bt更有效地从水溶液中去除MO。然而,GN-Bt的效率在pH> 6时迅速下降,这可能是由于碱性环境下GN16-1-16分子中酯基的水解所致。

著录项

  • 来源
    《Applied clay science》 |2011年第2期|p.184-187|共4页
  • 作者单位

    Key Laboratory of Chemical Synthesis and Pollution Control, China West Normal University, Nanchong, Sichuan 637009, China;

    Key Laboratory of Chemical Synthesis and Pollution Control, China West Normal University, Nanchong, Sichuan 637009, China;

    Key Laboratory of Chemical Synthesis and Pollution Control, China West Normal University, Nanchong, Sichuan 637009, China;

    Key Laboratory of Chemical Synthesis and Pollution Control, China West Normal University, Nanchong, Sichuan 637009, China;

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;

    Southwest Electric Power Design Institute, Chengdu, Sichuan 610021, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    gemini surfactant-modified bentonite; methyl orange; adsorption; decoloration; cod removal;

    机译:双子表面活性剂改性膨润土;甲基橙吸附脱色去除鳕鱼;
  • 入库时间 2022-08-17 13:55:18

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