Phosphorylation of graphehe oxide to improve adsorption of U(VI) from aquaeous solutions

被引：46

作者：

Chen, Haijun ^{[1
]}

Wang, Youqun ^{[1
,2
,3
]}

Zhao, Wuwei ^{[1
]}

Xiong, Guoxuan ^{[1
,2
,3
]}

Cao, Xiaohong ^{[1
,2
]}

Dai, Ying ^{[1
,2
]}

Le, Zhanggao ^{[1
,2
,3
]}

Zhang, Zhibin ^{[1
,2
]}

Liu, Yunhai ^{[1
,2
,3
]}

机构：

[1] East China Univ Technol, State Key Lab Breeding Base Nucl Resources & Envi, Nanchang 330013, Jiangxi, Peoples R China

[2] East China Univ Technol, Fundamental Sci Radioact Geol & Explorat Technol, Nanchang 330013, Jiangxi, Peoples R China

[3] East China Univ Technol, Minist Educ, Engn Res Ctr Nucl Technol Applicat, Nanchang 330013, Jiangxi, Peoples R China

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2017年 / 313卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Uranium; Adsorption; Graphene oxide; Phosphorylation; PHOSPHATE-FUNCTIONALIZED GRAPHENE; AQUEOUS-SOLUTION; SELECTIVE ADSORPTION; MESOPOROUS CARBON; URANIUM RECOVERY; HIGH-PERFORMANCE; REMOVAL; SORPTION; ACID; ADSORBENT;

D O I：

10.1007/s10967-017-5274-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学];

摘要：

The graphene oxide (GO) was functionalized with phosphate groups and applied as an effective adsorbent for the removal of uranium from aqueous solutions under various environmental conditions (e.g., solution pH, ions strength, contact time and temperature). Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy have confirmed that the phosphorylate group was successfully introduced on the surface of GO. The adsorption experiments indicated that the monolayer adsorption capacity has been increased from 249.38 mg/g (GO) to 336.70 mg/g [phosphorylated graphene oxide (PGO)] calculated by Langmuir model. Moreover, the adsorptive selectivity coefficients S (U(VI)/M(x)) increase from 42.43 to 51.96% after functionalized with phosphate group. The mechanism of U(VI) absorbed on PGO surface was dominated by surface complexation and electrostatic interaction. The results demonstrate that PGO will be a promising material for the efficient removal of U(VI) in the environment pollution remediation.

引用

页码：175 / 189

页数：15

共 51 条

[1]

Adsorption of heavy metals on Na-montmorillonite. Effect of pH and organic substances [J].