Yin Lianwei, Li Yanhui, Zhang Jie, Wang Xinxin, Chen Botong, Du Qiuju, Pi Xinxin, Zhang Yinxiao, Li Yichen, Zhou Haitong, He Yan
College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, China.
College of Mechanical and Electrical Engineering, Qingdao University, 308 Ningxia Road, Qingdao, 266071, China; State Key Laboratory of Bio-polysaccharide Fiber Forming and Eco-Textile, Qingdao University, 308 Ningxia Road, Qingdao, 266071, China.
Int J Biol Macromol. 2025 Sep 13;328(Pt 1):147630. doi: 10.1016/j.ijbiomac.2025.147630.
The removal of pollutants from wastewater using metal-organic frameworks (MOFs) has attracted increasing attention. In this study, an efficient composite adsorbent, UiO-67-NH@CA, was prepared by in-situ anchoring amino-functionalized UiO-67-NH onto cellulose aerogel (CA) derived from natural wood. The porous structure of CA facilitates the integration of MOF crystals and helps preserve their crystallinity. The adsorption performance of Congo Red (CR) was systematically evaluated through a series of batch experiments. UiO-67-NH@CA exhibited a high maximum adsorption capacity of 759.21 mg/g, which was well-fitted by both the pseudo-first-order kinetic and Sips isotherm models. Thermodynamic analysis confirmed that the process is spontaneous and endothermic. The proposed adsorption mechanism involves van der Waals forces, electrostatic interactions, coordination bonds, hydrogen bonding, and π-π interactions/stacking. Furthermore, the material maintained a high CR removal efficiency of 92 % under dynamic flow conditions. In addition, the influence of coexisting cations and anions was relatively minor, with a performance decrease of less than 7 %. After five adsorption-desorption cycles, the composite retained 82 % CR removal efficiency, indicating good reusability. These findings underscore the applicability of UiO-67-NH@CA as a stable and high-performance adsorbent for practical dye wastewater remediation.
