Su Ting, Shang Hongxia, Su Xinru, Sun Zhixian, Li Yuehan, Li Linwen, Zhang Zhen, Geng Renyong, Chen Shuisheng
Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Fuyang Normal University, Fuyang 236037, China.
School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, China.
Carbohydr Polym. 2024 Dec 1;345:122562. doi: 10.1016/j.carbpol.2024.122562. Epub 2024 Jul 31.
In this investigation, a hydrogel adsorbent featuring remarkable efficiency in dye adsorption was successfully synthesized by the integration of natural polysaccharide (pullulan) and nanoparticles (ZIF-8@PDA). The prepared natural polysaccharide nanocomposite hydrogels not only exhibit superior mechanical strength and biocompatibility, but also demonstrate adeptness in the removal of dye pollutants. The dye removal capacities were 615.4 mg/g for malachite green (MG) and 525.8 mg/g for Congo red (CR), respectively. Notably, the adsorption process exhibits minimal susceptibility to variations in water quality and the presence of co-existing ions. The pH-responsive surface charge conversion capability of the adsorbent renders it recyclable, maintaining a dye adsorption performance exceeding 88 % even after 5 cycles of repeated usage. Overall, these environmentally friendly natural polysaccharide nanocomposite hydrogels hold potential for addressing complex wastewater treatment challenges and long-term use.
在本研究中，通过将天然多糖（普鲁兰多糖）和纳米颗粒（ZIF-8@PDA）结合，成功合成了一种对染料吸附具有显著效率的水凝胶吸附剂。制备的天然多糖纳米复合水凝胶不仅具有优异的机械强度和生物相容性，而且在去除染料污染物方面表现出色。对孔雀石绿（MG）和刚果红（CR）的染料去除容量分别为615.4 mg/g和525.8 mg/g。值得注意的是，吸附过程对水质变化和共存离子的存在表现出最小的敏感性。吸附剂的pH响应表面电荷转换能力使其可回收利用，即使在重复使用5个循环后，仍保持超过88%的染料吸附性能。总体而言，这些环境友好的天然多糖纳米复合水凝胶在应对复杂的废水处理挑战和长期使用方面具有潜力。
