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

被引：7

作者：

Zheng, Jie ^{[2
,3
]}

Luo, Daojun ^{[3
]}

Qiao, Yahua ^{[1
]}

Wang, Liang ^{[1
]}

Wu, Wangsuo ^{[2
]}

Zhang, Chunming ^{[1
]}

Ye, Yuanlv ^{[1
,2
]}

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

[3] Minist Ind & Informat Technol, Elect Res Inst 5, Guangzhou 510610, Guangdong, Peoples R China

来源：

RADIOCHIMICA ACTA | 2017年 / 105卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Sorption; fulvic acid/humic substance; GMZ bentonite; uranyl ions; Stockholm humic model; NUCLEAR-MAGNETIC-RESONANCE; AQUATIC HUMIC SUBSTANCES; OXIDE-WATER INTERFACE; IONIC-STRENGTH; NA-MONTMORILLONITE; CA-MONTMORILLONITE; CARBON NANOTUBES; GRAPHENE OXIDES; CLAY-MINERALS; FOREIGN IONS;

D O I：

10.1515/ract-2016-2654

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 GMZ bentonite in the presence of fulvic acid are presented. The results demonstrated that FA is strongly bound to GMZ bentonite, and these molecules have a very large effect on the U(VI) sorption. The results also demonstrated that U(VI) sorption to GMZ bentonite in the presence and absence of sorbed FA can be well predicted by combining SHM and DLM. According to the model calculations, the nature of the interactions between FA with U(VI) at GMZ bentonite surface is mainly surface complex. The first attempt to simulate clay interaction with humus by the SHM model.

引用

页码：33 / 41

页数：9

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