海藻酸钠/聚乙烯醇复合凝胶的制备及吸附Co2+、MB的研究
Study on Preparation of SA/PVA Composite Hydrogel and Adsorption of Co2+and MB
吴淑茗 1梁雯霞 1吴佳斌1
作者信息
- 1. 闽南科技学院生命科学与化学学院,福建泉州 362332
- 折叠
摘要
以海藻酸钠(SA)、聚乙烯醇(PVA)为原料,以丙烯酸(AA)为单体合成SA/PVA-g-AA复合凝胶吸附剂,对凝胶材料的官能团结构和微观形貌进行表征.以Co2+、亚甲基蓝(MB)为吸附对象,考察了pH值、Co2+/MB初始质量浓度、凝胶投加量等对凝胶吸附性能的影响,并对吸附动力学进行探究.结果表明:复合凝胶的比表面积和平均孔径分别为120.896 7 m2/g和8.069 08 nm,呈现多孔结构,有利于对Co2+、MB的吸附.凝胶在60 min内对Co2+和MB的吸附都达到平衡,且均与准二级吸附动力学模型拟合较好.pH值分别为3和7、凝胶投加量为0.15 g、初始质量浓度均为100 mg/L条件下,凝胶对Co2+、MB的最大去除率分别为95.01%和98.78%.
Abstract
Using sodium alginate(SA),polyvinyl alcohol(PVA)as raw materials,acrylic acid(AA)as monomer to synthesize SA/PVA-g-AA hydrogel,the functional group structure and micromorphology of the hydrogel material were characterized.Using Co2+/MB as the adsorption object,the effects of pH,initial mass concentration,hydrogel addition on the adsorption of hydrogel performance were investigated,and the adsorption dynamics were explored.The results show that SA/PVA-g-AA hydrogel is a porous surface area of 120.896 7 m2/g and an average adsorption pore diameter of 8.069 08 nm which is beneficial to the adsorption of Co2+and MB.The composite hydrogel has a fast adsorption rate for Co2+/MB,and can reach adsorption equilibrium within 60 min,which is consistent with the quasi-second-order kinetic model.The maximum removal rates of Co2+and MB reaches 95.01%and 98.78%,respectively,when the pH value is 3 and 7,the hydrogel dosage is 0.15 g,and the initial mass concentration is 100 mg/L.
关键词
海藻酸钠/聚乙烯醇/复合凝胶/Co2+/MB/动力学Key words
Sodium alginate/PVA/Composite hydrogel/Co2+/MB/Dynamics引用本文复制引用
基金项目
福建省大学生创新创业训练计划(S202412992019)
闽南科技学院数字化课程建设项目(MKJG-2023-005)
闽南科技学院校级课程思政示范课程(MKKCSZ-2023-07)
出版年
2024
国家科技期刊平台
NSTL
万方数据