采用氧化-还原聚合制备了聚丙烯酰胺/桃胶多糖/凹凸棒土杂化水凝胶(PAAm/PGP/ATP),以其作为吸附剂去除水溶液中阴离子染料新胭脂红。采用傅里叶红外光谱、热失重、扫描电子显微镜等手段对杂化水凝胶进行了表征,并研究了杂化水凝胶的吸附动力学、热力学和等温吸附行为。结果表明:通过氧化-还原聚合制备了含有微米孔道的杂化水凝胶,最大吸水率为11.2g/g。PAAm/PGP/ATP杂化水凝胶达到吸附平衡的时间为10min,吸附过程符合准一级动力学模型,为吸热的自发过程,且符合Langmuir等温线模型,杂化水凝胶对新胭脂红的最大吸附容量为504.5mg/g。
Polyacrylamide/peach gum polysaccharide/attapulgite hybrid hydrogel (PAAm/PGP/ATP) was prepared by redox polymerization,and used as an adsorbent to remove the anionic dye neocarmine from aqueous solution.The hybrid hydrogel was characterized by Fourier transform infrared spectroscopy (FT-IR),thermogravimetry (TG) and scanning electron microscope (SEM),and the adsorption kinetics,thermodynamics and isothermal adsorption behavior of the hybrid hydrogel were studied.The results showed that the hybrid hydrogel with micron pores was successfully prepared by redox polymerization,and the maximum water uptake was 11.2g/g.The adsorption equilibrium time of PAAm/PGP/ATP hybrid hydrogel was 10 min,and the adsorption process with endothermic and spontaneous feature fitted the pseudo-first-order kinetic model and followed the Langmuir isotherm model.The maximum adsorption capacity of the hydrogel towards neocarmine was 504.5mg/g.
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基金资助
江苏省研究生实践创新计划项目(KYCX23-3052)
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