黄麻粉表面改性条件优化及其对Pd(Ⅱ)吸附行为的研究
Optimization of surface modification conditions of jute powder and its adsorption behavior for Pd(Ⅱ)
卢嫚 1葛漫漫 1李勇 2王国祯 3康欣可 3谭玲 4董海刚 3谢建平1
作者信息
- 1. 中南大学资源加工与生物工程学院,长沙 410083
- 2. 贵研资源(易门)有限公司,云南玉溪 651100
- 3. 云南贵金属实验室有限公司,昆明 650106
- 4. 湖南科技大学生命科学与健康学院,湖南湘潭 411201
- 折叠
摘要
生物基材料是吸附绿色、高效回收钯的重要手段,但是,如何提升生物基吸附材料的吸附量是该技术能否成功应用的关键.本研究利用聚乙烯亚胺(PEI)对黄麻粉(UJT)进行了表面改性条件优化和机理的研究.研究结果表明,黄麻表面改性最优条件为:PEI和戊二醛(GA)添加量分别为(w/V)7％,1.5％时,改性黄麻粉(MJT)对Pd(Ⅱ)的理论吸附量最大(687.01 mg/g),是UJT的4.26倍;改性前后黄麻对Pd(Ⅱ)的吸附均符合Langmuir等温吸附模型和拟二级动力学模型.相比UJT,MJT的N元素质量分数提高了 3.49倍,显示出PEI改性引入的亚氨基(=N-)在提升吸附性能中起关键作用,为植物材料在铂族金属吸附回收产业化方面奠定了理论基础.
Abstract
The adsorption and recovery by bio-based materials is an important means of green and efficient recovery of palladium,but improving the adsorption amount of bio-based adsorption materials is the key to the successful application of this tech.In this study,polyethyleneimine(PEI)was used to realize the surface modification condition optimization and study the mechanism.The results show that when the content of PEI and glutaraldehyde(GA)is(w/V)7％,1.5％,the theoretical adsorption of Pd(Ⅱ)will be maximized(687.01 mg/g),which is 4.26 times that of the original jute powder;and the adsorption of both biomasses to Pd(Ⅱ)is consistent with the Langmuir isothermal adsorption model and the pseudo-second-order kinetic model.Compared with the original jute powder,the N element mass fraction of the modified jute powder increased by 3.49 times,showing the key role of the imino group(=N-)introduced by PEI modification in improving the adsorption performance.This study lays a theoretical foundation for the plant materials'industrialization in platinum group metal adsorption and recovery.
关键词
黄麻粉/钯/表面改性/生物吸附Key words
jute powder/palladium/surface modification/biosorption引用本文复制引用
基金项目
云南贵金属实验室重点研发计划(YPML-2023050224)
中建五局科技研发课题(CSCEC5b-2026-26)
国家自然科学基金面上项目(51871250)
云南省重大科技专项计划(202102AB080007)
出版年
2024
NETL
NSTL
万方数据