Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, T6G 2P5, Canada; School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China.
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, T6G 2P5, Canada.
Carbohydr Polym. 2019 Apr 15;210:314-321. doi: 10.1016/j.carbpol.2019.01.080. Epub 2019 Jan 24.
This work has developed a convenient way of constructing wood cellulose and clay green composite hydrogel as efficient adsorbent of colored organic effluent. The optimized cellulose/montmorillonite(MTM) hydrogels showed excellent methylene blue (MB) absorption with the maximum capacity of adsorption (Q) of 277 mg/g, which is not only higher than MTM alone, but also higher than many other natural clay composite adsorbents. Adsorption mechanism and kinetic studies that the physisorption was a major processing in MB absorption and the adsorption mainly occurred in the internal structure of composite hydrogel. This indicated that the MTM embedded inside played the most critical role for the MB dye adsorption. Owing to its biodegradability and excellent adsorption capacity, cellulose/MTM hydrogel has good potential for colored organic effluent treatment. The simple procedure and cost effective wood cellulose as raw material for the composite absorbent construction presented in this research are favorable for industrial applications.
本工作开发了一种方便的构建木纤维素和粘土绿色复合水凝胶的方法，将其作为有效吸附剂来吸附有色有机废水。优化后的纤维素/蒙脱土（MTM）水凝胶对亚甲基蓝（MB）具有优异的吸附能力，最大吸附容量（Q）为 277mg/g，不仅高于单独的 MTM，而且高于许多其他天然粘土复合吸附剂。吸附机制和动力学研究表明，物理吸附是 MB 吸收的主要过程，吸附主要发生在复合水凝胶的内部结构中。这表明，嵌入的 MTM 对 MB 染料吸附起着最关键的作用。由于其生物降解性和优异的吸附能力，纤维素/MTM 水凝胶在处理有色有机废水中具有良好的应用前景。本研究中采用简单的工艺和具有成本效益的木纤维素作为复合材料吸收剂的原料，有利于工业应用。
