Surface complexation modeling of U(VI) sorption on TiO2 in the presence of fulvic acid

被引：5

作者：

Ye, Yuanlv ^{[1
,2
]}

Qiao, Yahua ^{[1
]}

Wang, Liang ^{[1
]}

Liu, Fudong ^{[1
]}

Guo, Zhijun ^{[2
]}

Wu, Wangsuo ^{[2
]}

Zhang, Chunming ^{[1
]}

机构：

[1] Minist Environm Protect, Nucl & Radiat Safety Ctr, Beijing 100082, Peoples R China

[2] Lanzhou Univ, Sch Nucl Sci & Technol, Radiochem Lab, Lanzhou 730000, Peoples R China

来源：

RADIOCHIMICA ACTA | 2016年 / 104卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Sorption; fulvic acid/humic substance; oxides; uranyl ions; solutions; surface properties; SCM model; NUCLEAR-MAGNETIC-RESONANCE; TITANIUM-DIOXIDE; IONIC-STRENGTH; HUMIC SUBSTANCES; EU(III) SORPTION; SINGLE-CRYSTAL; ADSORPTION; GOETHITE; BINDING; URANIUM(VI);

D O I：

10.1515/ract-2015-2449

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In this work, experiments and modeling for the interactions between uranyl ion and TiO2 in the presence of fulvic acid are presented. The results demonstrated that FA is strongly bound to TiO2, and these molecules have a very large effect on the U(VI) sorption, and vice versa. The results also demonstrated that U(VI) sorption to TiO2 in the presence and absence of sorbed FA can be well predicted with the SCD model (surface and complex distribution). According to the model calculations, the nature of the interactions between FA with U(VI) at TiO2 surface is mainly surface complex and electrostatic potential.

引用

页码：85 / 95

页数：11

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