Chen Tao, Liu Haochen, Gao Jie, Hu Guowen, Zhao Yuan, Tang Xiuqin, Han Xiaobing
Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Non-Power Nuclear Technology, Collaborative Innovation Center, Hubei University of Science and Technology, Xianning 437100, China.
Polymers (Basel). 2022 Jul 19;14(14):2917. doi: 10.3390/polym14142917.
Dye pollution is a serious issue in current environment protection, and bio-based adsorbents have been receiving much attention in wastewater treatment, due to their low cost, renewable, and environmentally friendly characteristics. Bio-based sodium alginate/lignin composite (SA/Lig) hydrogel beads were fabricated by a facile cross-linking with calcium ion and used for the removal of methylene blue (MB). The obtained SA/Lig microbeads were characterized with SEM, FTIR, and TG, and the effect of lignin content, pH, and temperature on the MB adsorption was investigated. The results indicated that the introduction of aromatic lignin can not only enhance thermal stability but also can improve the adsorption performance. Under optimal conditions, the maximum adsorption capacity (254.3 mg/g) was obtained for the SA/Lig-20% beads, with a removal efficiency of 84.8%. The adsorption process for MB is endothermic, and the rate-limiting step is chemical adsorption. The removal efficiency is higher than 90% after five cycles, revealing that the prepared beads show good regeneration ability.
染料污染是当前环境保护中的一个严重问题，由于其低成本、可再生和环境友好的特性，生物基吸附剂在废水处理中受到了广泛关注。通过与钙离子进行简便的交联制备了生物基海藻酸钠/木质素复合（SA/Lig）水凝胶珠，并用于去除亚甲基蓝（MB）。利用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）和热重分析（TG）对所得的SA/Lig微珠进行了表征，并研究了木质素含量、pH值和温度对MB吸附的影响。结果表明，芳香族木质素的引入不仅可以提高热稳定性，还可以改善吸附性能。在最佳条件下，SA/Lig-20%珠的最大吸附容量为254.3 mg/g，去除效率为84.8%。MB的吸附过程是吸热的，限速步骤是化学吸附。经过五个循环后，去除效率高于90%，表明所制备的珠子具有良好的再生能力。
Zotero 插件
