Wang Xiaohong, Wu Xingli, Wen Yun, Zhou Jiayi, Xu Yannan, Yang Lingze, Wu Jingbo, Hao Chen
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China.
Int J Biol Macromol. 2025 Jul;318(Pt 1):144814. doi: 10.1016/j.ijbiomac.2025.144814. Epub 2025 May 30.
Sodium humate (SH)/guar gum (GG)@MIL-100 (Fe) composite hydrogel absorbent was successfully prepared by combining free radical polymerization and in-situ growth technology, which was subsequently applied to remove Cu, methylene blue (MB) and malachite green (MG) from wastewater. In this study, the effects of adsorption time, solution pH, adsorbent quality and initial concentration of pollutants on the adsorption performance of SH/GG@MIL-100 hydrogel were investigated. The adsorption process and rate-limiting steps involved in the removal of pollutants by SH/GG@MIL-100 were scrutinized using a multifaceted approach that encompassed the Langmuir isotherm model, Freundlich isotherm model, pseudo-first-order and pseudo-second-order kinetic models, along with the intraparticle diffusion kinetic model. The maximum adsorption capacity of Cu, MB and MG by SH/GG@MIL-100 can reach 311.48 mg g, 834.16 mg g and 794.45 mg g, respectively. The adsorption process involves many mechanisms such as hydrogen bonding, electrostatic attraction, surface complexation and π-π conjugation.
通过自由基聚合和原位生长技术相结合，成功制备了腐植酸钠（SH）/瓜尔胶（GG）@MIL-100（Fe）复合水凝胶吸附剂，并将其应用于去除废水中的铜、亚甲基蓝（MB）和孔雀石绿（MG）。本研究考察了吸附时间、溶液pH值、吸附剂质量和污染物初始浓度对SH/GG@MIL-100水凝胶吸附性能的影响。采用包括朗缪尔等温线模型、弗伦德利希等温线模型、准一级和准二级动力学模型以及颗粒内扩散动力学模型在内的多方面方法，对SH/GG@MIL-100去除污染物的吸附过程和限速步骤进行了仔细研究。SH/GG@MIL-100对铜、MB和MG的最大吸附容量分别可达311.48 mg/g、834.16 mg/g和794.45 mg/g。吸附过程涉及氢键、静电吸引、表面络合和π-π共轭等多种机制。
