木质素/海藻酸钠水凝胶用于高效去除亚甲基蓝。
Lignin/sodium alginate hydrogel for efficient removal of methylene blue.
机构信息
Institute of Chemical Industry of Forest Products, CAF, China; National Engineering Lab. for Biomass Chemical Utilization, China; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, China; Key Lab. of Biomass Energy and Material, Jiangsu Province, China; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China.
Institute of Chemical Industry of Forest Products, CAF, China; National Engineering Lab. for Biomass Chemical Utilization, China; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, China; Key Lab. of Biomass Energy and Material, Jiangsu Province, China; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China.
出版信息
Int J Biol Macromol. 2023 May 15;237:124200. doi: 10.1016/j.ijbiomac.2023.124200. Epub 2023 Mar 25.
In this work, a class of bio-based hydrogels (LN-NH-SA hydrogel) were prepared from aminated lignin and sodium alginate. The physical and chemical properties of the LN-NH-SA hydrogel were fully characterized using field emission scanning electron microscopy, thermogravimetric analysis, fourier transform infrared spectroscopy, N adsorption-desorption isotherms, and other techniques. LN-NH-SA hydrogels were tested for the adsorption of dyes (methyl orange and methylene blue). The LN-NH-SA@3 hydrogel showed better adsorption efficiency for MB with a maximum adsorption capacity of 388.81 mg·g, a bio-based adsorbent with a high adsorption capacity. The adsorption process followed the pseudo-second-order model and fitted to the Freundlich isotherm equation. More importantly, LN-NH-SA@3 hydrogel maintained 87.64 % adsorption efficiency after 5 cycles. Overall, the proposed hydrogel with environmentally friendly and low cost is promising for the absorption of dye contamination.
在这项工作中，我们制备了一类由氨基化木质素和海藻酸钠组成的生物基水凝胶（LN-NH-SA 水凝胶）。使用场发射扫描电子显微镜、热重分析、傅里叶变换红外光谱、N2 吸附-脱附等温线等技术对 LN-NH-SA 水凝胶的物理化学性质进行了全面表征。对 LN-NH-SA 水凝胶进行了染料（甲基橙和亚甲基蓝）吸附性能测试。LN-NH-SA@3 水凝胶对 MB 具有更好的吸附效率，最大吸附容量为 388.81mg·g，是一种具有高吸附容量的生物基吸附剂。吸附过程符合准二级动力学模型，并符合 Freundlich 等温方程。更重要的是，LN-NH-SA@3 水凝胶在 5 次循环后仍保持 87.64%的吸附效率。总之，这种具有环保、低成本优势的水凝胶有望用于吸收染料污染。
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