College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China.
College of Chemistry, Chemical Engineering and Resource Utilization, Key Laboratory of Forest Plant Ecology, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China.
Int J Biol Macromol. 2023 May 31;238:124080. doi: 10.1016/j.ijbiomac.2023.124080. Epub 2023 Mar 20.
Hybrid lignin (HL) particles were synthesized by compounding lignosulfonate and carboxylated chitosan through a simple ionic cross-linking method, and modifying by polyvinylpolyamine. Due to the synergistic effect of recombination and modification, the material exhibits excellent adsorption performance for anionic dyes in water. The structural characteristics and adsorptive behavior were systematically investigated. The pseudo-second-order kinetic model and the Langmuir model were revealed to well describe the sorption procedure of HL for anionic dyes. The results exhibited that the sorption capacities of HL on sodium indigo disulfonate and tartrazine were 1099.01 mg/g and 436.68 mg/g, respectively. Simultaneously, the adsorbent behaved no significant adsorption capacity loss after five adsorption-desorption cycles, indicating its superb stability and recyclability. Additionally, the HL exhibited excellent selective adsorption of anionic dyes form binary dye adsorption systems. The interaction forces between adsorbent and dye molecules, such as hydrogen bonding, π-π stacking, electrostatic attraction and cation bonding bridge, are discussed in detail. The facile preparation process and superior dyes removal performance of HL were considered a potential adsorbent to remove anionic dyes from wastewater.
通过简单的离子交联法将木质素磺酸盐和羧化壳聚糖复合，并通过聚乙烯多胺进行修饰，合成了杂化木质素（HL）颗粒。由于重组和修饰的协同效应，该材料对水中的阴离子染料表现出优异的吸附性能。系统研究了其结构特征和吸附行为。结果表明，HL 对亚甲基蓝和柠檬黄的吸附过程符合准二级动力学模型和 Langmuir 模型。HL 对亚甲基蓝和柠檬黄的吸附容量分别为 1099.01mg/g 和 436.68mg/g。同时，该吸附剂在五次吸附-解吸循环后表现出没有明显的吸附容量损失，表明其具有优异的稳定性和可回收性。此外，HL 对二元染料吸附体系中的阴离子染料表现出优异的选择吸附性能。详细讨论了吸附剂与染料分子之间的相互作用力，如氢键、π-π堆积、静电吸引和阳离子桥键。HL 具有制备过程简单、去除染料性能优异的特点，有望成为一种从废水中去除阴离子染料的潜在吸附剂。
