Song Jie, Yuan Zhiwen, Chen Lijun, Zhou Yingnan, Niu Yuhua, Wei Zhiqiang
Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, 710021 Xi'an, China.
Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, 710021 Xi'an, China.
Int J Biol Macromol. 2025 Sep;321(Pt 2):146303. doi: 10.1016/j.ijbiomac.2025.146303. Epub 2025 Jul 24.
In order to break through the double bottleneck of traditional single skeleton adsorbent materials in terms of adsorption capacity and selectivity, and realize the efficient removal of typical aromatic pollutants in the environment. In this study, using coal gangue (CG) as the raw material, the first skeleton was formed by thermal activation and modification of gangue (MCG) with organic acid. The sol-gel technology was adopted, and sodium alginate (SA) connected by potassium humate (KHA) was used as the second skeleton material. An adsorption material with a dual skeleton structure of P-KHA/SA/PEI/GLU/MCG (P-KSGM) was successfully synthesized, and apply it to the removal of Methylene blue (MB) and Phenol (pH). The adsorption of MB and Ph by P-KSGM is consistent with a pseudo-second order kinetic model, the isothermal adsorption process for MB is more consistent with the Langmuir model and the isothermal adsorption process for Ph is more consistent with the Freundlich model, with maximum adsorption capacities of 813.01 mg/g for MB and 418.41 mg/g for Ph, and adsorption MB is a heat-absorbing process, while adsorption Ph is an exothermic process. The adsorption process is a dynamic process constructed by chemical/physical adsorption, so as to realize the effective removal of MB and Ph from wastewater. Through five adsorption-desorption cycle experiments P-KSGM still has 81.36 % and 35.20 % removal efficiency for MB and Ph, with excellent recycling performance.
为突破传统单一骨架吸附材料在吸附容量和选择性方面的双重瓶颈，实现对环境中典型芳香族污染物的高效去除。本研究以煤矸石（CG）为原料，通过热活化和用有机酸改性煤矸石（MCG）形成第一骨架。采用溶胶 - 凝胶技术，以通过腐植酸钾（KHA）连接的海藻酸钠（SA）作为第二骨架材料。成功合成了具有P - KHA/SA/PEI/GLU/MCG双骨架结构的吸附材料（P - KSGM），并将其应用于亚甲基蓝（MB）和苯酚（pH）的去除。P - KSGM对MB和Ph的吸附符合准二级动力学模型，MB的等温吸附过程更符合Langmuir模型，Ph的等温吸附过程更符合Freundlich模型，对MB的最大吸附容量为813.01 mg/g，对Ph的最大吸附容量为418.41 mg/g，吸附MB是吸热过程，而吸附Ph是放热过程。吸附过程是由化学/物理吸附构建的动态过程，从而实现从废水中有效去除MB和Ph。通过五次吸附 - 解吸循环实验，P - KSGM对MB和Ph的去除效率仍分别为81.36%和35.20%，具有优异的循环性能。
