New insights into the sorption of U(VI) on kaolinite and illite in the presence of Aspergillus niger

被引：19

作者：

Geng, Rongyue ^{[1
,3
]}

Yuan, Longmiao ^{[1
,3
]}

Shi, Leiping ^{[1
,3
]}

Qiang, Shirong ^{[4
]}

Li, Yuqiang ^{[1
]}

Liang, Jianjun ^{[1
,2
]}

Li, Ping ^{[1
,2
]}

Zheng, Guodong ^{[1
,2
]}

Fan, Qiaohui ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China

[2] Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Lanzhou Univ, Sch Basic Med Sci, Inst Physiol, Key Lab Preclin Study New Drugs Gansu Prov, Lanzhou 730000, Peoples R China

来源：

CHEMOSPHERE | 2022年 / 288卷

基金：

中国国家自然科学基金;

关键词：

Uranium; Sorption; Bio-composites; Clay minerals; Mechanism; SACCHAROMYCES-CEREVISIAE; MICROBIAL REDUCTION; HEAVY-METALS; URANIUM; BACTERIA; ADSORPTION; BIOSORPTION; COMPOSITES; REMOVAL; BIOMINERALIZATION;

D O I：

10.1016/j.chemosphere.2021.132497

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The regulation effect of Aspergillus niger to the sorption behavior of U(VI) on kaolinite and illite was studied through investigating the enrichment of U(VI) on kaolinite-Aspergillus niger and illite-Aspergillus niger composites. Kaolinite-or illite-A. niger composites were prepared through co-culturation method. Results showed that U(VI) sorption on kaolinite and illite in different pH ranges could be attributed to ion exchange, outer-sphere complexes (OSCs), and inner-sphere complexes (ISCs), while only the ISCs on the bio-composites. Moreover, micro spectroscopy tests revealed that U(VI) coordinate with phosphate, amide, and carboxyl groups on illite-and kaolinite-A. niger composites. X-ray photoelectron spectroscopy (XPS) further found that U(VI) was partly reduced to non-crystalline U(IV) by A. niger in the bio-composites, occurring as phosphate coordination polymers or biomass-associated monomers. The findings herein provide further insight into the immobilization and migration of uranium in environments.

引用

页数：9

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