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纤维素吸附絮凝双功能材料合成与性能研究

发表时间:2018-09-30  浏览量:140  下载量:23
全部作者: 范志磊,谈学松,张勇
作者单位: 浙江理工大学材料与纺织学院
摘 要: 利用氯乙酸钠(sodium chloroacetate,SMA)对竹浆纤维素(bamboo pulp cellulose,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,利用扫描电子显微镜(scanning electron microscopy,SEM)、傅里叶变换红外光谱(Fourier transform infrared spectroscopy,FTIR)、Zeta电位分析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的用量对材料处理废水的效果影响最大。同时,BPC-SMA-Bent在pH=2~3时呈正电性,在pH=3~11时呈负电性,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。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为93.9%、93.7%、90.4%. 最后对实际印染废水进行处理,其浊度、色度、重铬酸化学需氧量(dichromate chemical oxygen demand,CODCr)去除率分别为91.2%、94.4%、78.0%,去除效果均优于商业聚丙烯酰胺(polyacrylamide,PAM)。
关 键 词: 环境工程学;吸附絮凝材料;阴离子化;纤维素;膨润土;印染废水
Title: Synthesis and properties of cellulose-based adsorption flocculation bifunctional materials
Author: FAN Zhilei, TAN Xuesong, ZHANG Yong
Organization: College of Materials and Textiles, Zhejiang Sci-Tech University
Abstract: The bamboo pulp cellulose (BPC) was modified and anionized by sodium chloroacetate (SMA) and then it was combined with bentonite (Bent) calcined at 450℃ 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 (SEM), Fourier transform infrared spectroscopy (FTIR) and Zeta potential analyzer. This material was applied to the treatment of industrial printing and dyeing wastewater. The results show that the amount of SMA and Bent has the greatest impact on the effect of material to treat the wastewater. At the same time, BPC-SMA-Bent exhibites positive in the range of pH=2-3. Compared with BPC, BPC-SMA-Bent has stronger electronegativity in the range of pH=3-11 that is 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 dichromate chemical oxygen demand (CODCr) removal rates were 91.2%, 94.4% and 78.0%, respectively. The removal efficiency is better than commercial polyacrylamide (PAM).
Key words: environmental engineering; adsorption flocculation material; anionization; cellulose; bentonite; printing and dyeing wastewater
发表期数: 2018年9月第18期
引用格式: 范志磊,谈学松,张勇. 纤维素吸附絮凝双功能材料合成与性能研究[J]. 中国科技论文在线精品论文,2018,11(18):1823-1831.
 
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