嗜硫原始红藻表面自组装ZIF及其对铀(Ⅵ)的吸附性能研究  

Enhancing adsorption capacities of uranium(VI)by assembling metal-organic frameworks on Galdieria suluraria

作　　者：周昌友 陈元涛 张炜 王海洋 韩珊珊 荆永康 ZHOU Changyou;CHEN Yuantao;ZHANG Wei;WANG Haiyang;HAN Shanshan;JING Yongkang(College of Chemistry and Chemical Engineering,Qinghai Normal University,Xining 810008)

机构地区：[1]青海师范大学化学化工学院,西宁810008

出　　处：《环境科学学报》2024年第10期257-267,共11页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.22266027)。

摘　　要：采用一锅法在嗜硫原始红藻表面成功实现了ZIF-8和ZIF-67的自组装,并考察了Gs/ZIF-8和Gs/ZIF-67在不同pH、浓度、温度、时间等条件下对铀(Ⅵ)的吸附性能.结果表明,Gs/ZIF-8和Gs/ZIF-67最佳吸附pH值分别为5和5.5.热力学和动力学模型分析表明,吸附过程以单分子层的化学吸附为主导,且为自发的吸热过程.在25℃下,Gs/ZIF-8和Gs/ZIF-67的最大吸附量分别为393.04 mg·g^(-1)和619.07 mg·g^(-1),与纯藻粉相比,吸附量分别提升了24.11%和94.99%.这一研究为金属有机框架化合物提高微藻对铀(Ⅵ)的吸附量提供了新思路,也为解决铀(Ⅵ)污染问题提供了有益参考.The composites Gs/ZIF-8 and Gs/ZIF-67 were prepared by self-assembly of ZIF-8 and ZIF-67 on the surface of Galdieria suluraria by the onepot method.The adsorption performance of the composites on U(VI)was then investigated under different pH,concentration,temperature conditions.The results demonstrated that the optimal pH for the adsorption of U(VI)were 5 and 5.5,respectively.Thermodynamic and kinetic analyses indicated that the adsorption process was dominated by the chemisorption of the monomolecular layer and was a spontaneous adsorption process.The maximum adsorption capacities of Gs/ZIF-8 and Gs/ZIF-67 were 393.04 mg·g^(-1) and 619.07 mg·g^(-1) at 25℃,respectively,representing enhancements of 24.11%and 94.99%in adsorption amounts compared to that of pure algal powder.This study introduces a novel approach for enhancing the adsorption of U(VI)by algae using metal-organic framework compounds.It also serves as a valuable reference for addressing the U(VI)contamination problem.

关 键 词：嗜硫原始红藻 金属有机框架 铀酰 吸附 

分 类 号：X703[环境科学与工程—环境工程]