胺基功能化介孔硅材料对铀(VI)的吸附及机理研究  

Absorption and Mechanism of Amine-Functionalized Mesoporous Silica Materi⁃als for Uranium(VI)

作　　者：韦克钢 WEI Kegang(Jiangxi Copper Technology Institute Co.,Ltd.,Nanchang 330500,China)

机构地区：[1]江西铜业技术研究院有限公司,江西南昌330500

出　　处：《铜业工程》2024年第4期105-112,共8页Copper Engineering

基　　金：江西省重大科技研发专项项目(20232ACE01010)资助。

摘　　要：本研究探讨了胺基功能化介孔硅材料(AFPS)对水体中铀(VI)的吸附性能及其吸附机理。通过合成8种具有不同孔径和胺基功能团(APTES和AEPTES)的AFPS,评估了这些材料在不同pH条件下对铀(VI)的吸附效果。实验结果显示,在pH值约为5.5的条件下,AFPS对铀(VI)的吸附效率最高。孔径分析表明,AEPTES功能团的最佳孔径为4.1 nm,而APTES功能团的最佳孔径为2.7 nm。吸附机理研究表明,胺基通过与水合铀酰分子团表面的羟基(OH-)结合,实现了对铀(VI)的有效吸附。本研究不仅为理解AFPS吸附铀(VI)的机制提供了科学依据,也为开发新型高效吸附材料提供了理论支持和研究方向。This study investigates the absorption performance and mechanism of amine-functionalized mesoporous silica(AFPS)materi⁃als for uranium(VI)in water.Eight AFPS materials with varying pore sizes and amino functional groups(APTES and AEPTES)were synthesized to assess their absorption effects on uranium(VI)under different pH conditions.The experimental findings reveal that AF⁃PS exhibits the highest absorption efficiency for uranium(VI)at a pH of approximately 5.5.Aperture analysis indicates that the optimal pore size for the AEPTES functional group is 4.1 nm,whereas for the APTES functional group,being 2.7 nm.Investigation into the ad⁃sorption mechanism suggests that amine groups effectively adsorb uranium(VI)by binding with hydroxyl groups(OH-)on the surface of hydrated uranyl groups.This study provides a scientific basis for understanding the mechanism of AFPS absorption of uranium(VI)and offers theoretical support and research direction for developing new and efficient absorption materials.

关 键 词：铀(VI) 胺基功能化 介孔硅 吸附机理 环境工程 

分 类 号：TF813[冶金工程—有色金属冶金] TF804.2