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通过溶液插层法和静电纺丝技术制备聚丙烯腈/蒙脱土(PAN-MMT)复合纳米纤维膜,测试了其对亚甲基蓝的吸附行为。研究了吸附过程中的吸附时间、溶液酸碱度、染液初始浓度等影响因素对吸附平衡量的影响,并对PANMMT复合纳米纤维膜的吸附行为和等温线模型进行模拟。结果表明,PAN-MMT纳米纤维膜在40℃条件下,吸附5h后达到吸附平衡;当亚甲基蓝的初始浓度为80mg/L时,吸附量最大,达到23.90mg/g;当溶液pH=11时,纳米纤维膜对亚甲基蓝染液的脱色率最大,可达到100%;PAN-MMT复合纳米纤维膜的吸附行为遵循拟二级动力学模型和Langmuir等温线模型。
Polyacrylonitrile / montmorillonite (PAN-MMT) composite nanofibers were prepared by solution intercalation and electrospinning, and their adsorption behaviors on methylene blue were tested. The effects of adsorption time, pH value of the solution and initial concentration of the dye solution on the equilibrium amount of adsorption were studied. The adsorption behavior and isotherm model of PANMMT nanofiber membrane were simulated. The results showed that PAN-MMT nanofiber membrane adsorbed at 40 ℃ for 5h and reached equilibrium adsorption. When the initial concentration of methylene blue was 80mg / L, the adsorption capacity reached the maximum of 23.90mg / g. When pH = 11, The decolorization rate of methylene blue dye was the largest, which could reach 100%. The adsorption behavior of PAN-MMT composite nanofiber membrane followed the pseudo-second-order kinetic model and Langmuir isotherm model.