Shen Jun-Ju, Ren Lei-Lei, Zhuang Yuan-Yi
College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China; School of Chemistry and Material Science, Shanxi Teachers University, Linfen 041004, PR China.
J Hazard Mater. 2006 Aug 25;136(3):809-15. doi: 10.1016/j.jhazmat.2006.01.013. Epub 2006 Feb 14.
Copolymer of acrylamide and 2-[(methacryloyloxy)ethyl]trimethylammonium chloride [P(AM-DMC)] is found to be effective to combine anionic dyes with strong aqueous solubility. This work aims mainly at revealing the interaction between anionic dyes and [P(AM-DMC)] by running jar test, spectra analysis and equilibrium dialysis experiments. The results show that P(AM-DMC) effectively decolorizes the tested strong water soluble anionic dyes, such as acidic, reactive and direct dyes, from their aqueous solutions under mild acidic and neutral conditions. Higher cationicity and optimal dose of flocculant P(AM-DMC) have to be used to achieve satisfactory and effective decolorization. Comparison of IR spectra of dye, flocculant P(AM-DMC) and the floc formed indicates chemical interaction occurred between sulfonic groups of dye and quaternary ammonium of flocculant. Plots of r-logC suggest cooperative interaction exists evidently for some dyes tested. Addition of KCl or urea reduces binding extent evidently, which shows the importance of electrostatic and hydrophobic interaction. Therefore the interaction between dyes tested and P(AM-DMC) might be controlled by hydrophobic, cooperative interaction and energetic interaction which includes chemical and electrostatic interactions.
丙烯酰胺与2-[(甲基丙烯酰氧基)乙基]三甲基氯化铵的共聚物[P(AM-DMC)]被发现能有效地结合具有强水溶性的阴离子染料。这项工作主要旨在通过进行烧杯试验、光谱分析和平衡透析实验来揭示阴离子染料与[P(AM-DMC)]之间的相互作用。结果表明，在温和酸性和中性条件下，P(AM-DMC)能有效地使测试的强水溶性阴离子染料，如酸性染料、活性染料和直接染料，从其水溶液中脱色。必须使用更高的阳离子度和絮凝剂P(AM-DMC)的最佳剂量才能实现令人满意和有效的脱色。染料、絮凝剂P(AM-DMC)和形成的絮凝物的红外光谱比较表明，染料的磺酸基团与絮凝剂的季铵之间发生了化学相互作用。r-logC图表明，对于一些测试染料，明显存在协同相互作用。添加KCl或尿素会明显降低结合程度，这表明静电和疏水相互作用的重要性。因此，测试染料与P(AM-DMC)之间的相互作用可能受疏水、协同相互作用以及包括化学和静电相互作用在内的能量相互作用的控制。
