纤维素吸附絮凝双功能材料合成与性能研究
首发时间:2018-07-30
摘要:利用氯乙酸钠(SMA)对竹浆纤维素(BPC)进行改性,使其阴离子化,再与450℃焙烧的膨润土(Bent)结合,制备出一种吸附絮凝的双功能材料(BPC-SMA-Bent)。优化制备工艺,并利用扫描电子显微镜,傅里叶变换红外光谱仪,Zeta电位分析仪等对最优条件下制备的材料进行结构和形貌的表征,并最终将其应用于工厂印染废水处理中。结果表明,SMA和 Bent的用量对材料效果影响最大。同时,BPC-SMA-Bent在pH 2-3呈现正电性,pH 3-11均为负电性,相对于BPC其电负性明显增强,这有利于吸附絮凝过程的进行。同时利用BPC-SMA-Bent对模拟高岭土悬浊液,亚甲基蓝和分散黄E-3G进行处理,其浊度和色度去除率分别是93.9%、93.7%、90.4%。最后对实际印染废水进行处理,其浊度、色度、CODCr去除率分别是91.2%、94.4%、78.0%,其去除效果均优于商业聚丙烯酰胺(PAM)。
关键词: 纤维素 膨润土 氯乙酸钠 阴离子化 吸附絮凝材料 印染废水
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Synthesis and Properties of Cellulose Based Adsorption Flocculation Bifunctional Materials
Abstract:The bamboo pulp cellulose (BPC) was modified by sodium chloroacetate (SMA) and then it was combined with bentonite(Bent) calcined at 450 C to obtain the bifunctional material (BPC-SMA-Bent)with the function of adsorption and flocculation. The optimal preparation process was gained by adjusting the reaction conditions. The structure and morphology of the materials prepared under the optimal conditions were characterized by scanning electron microscopy, Fourier transform infrared spectrometer and Zeta potential analyzer. This material was applied to the treatment of printing and dyeing wastewater. The results showed that the amount of SMA and Bent have the greatest impact on the final product. At the same time, BPC-SMA-Bent exhibited positive in the range of pH 2-3. Compared with BPC, BPC-SMA-Bent had stronger electronegativity in the range of pH 3-11 that was beneficial to the adsorption and flocculation process. The simulated kaolin suspension, methylene blue and disperse yellow E-3G were treated with BPC-SMA-Bent. The turbidity and color removal rates were 93.9%, 93.7%, and 90.4%, respectively. Finally, the printing and dyeing wastewater was treated by BPC-SMA-Bent. The turbidity, color and CODCr removal rates were 91.2%, 94.4% and 78.0%, respectively. The removal efficiency was better than commercial PAM.
Keywords: cellulose bentonite sodium chloroacetate anionization adsorption flocculation material printing and dyeing wastewater
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