Efficient removal and immobilization of radioactive iodide and iodate from aqueous solutions by bismuth-based composite beads

被引：47

作者：

Zhao, Qian ^{[1
,2
,3
]}

Chen, Guangyuan ^{[1
,2
,3
]}

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

Jiang, Mei ^{[1
,2
,3
,4
]}

Lin, Jingruolan ^{[1
,2
,3
]}

Zhang, Ling ^{[1
,2
,3
]}

Zhu, Lin ^{[1
,2
,3
]}

Duan, Tao ^{[1
,2
,3
]}

机构：

[1] Southwest Univ Sci & Technol, Natl Coinnovat Ctr Nucl Waste Disposal & Environm, Mianyang 621010, Sichuan, Peoples R China

[2] Southwest Univ Sci & Technol, Fundamental Sci Nucl Wastes & Environm Safety Lab, Mianyang 621010, Sichuan, Peoples R China

[3] Southwest Univ Sci & Technol, Sch Natl Def Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China

[4] China West Normal Univ, Sch Phys & Space Sci, Nanchong 637002, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 426卷

基金：

中国国家自然科学基金;

关键词：

Iodide; Iodate; Bismuth-based material; Adsorption; Immobilization; ENHANCED REMOVAL; PHOTOCATALYTIC PERFORMANCE; SELECTIVE CAPTURE; COLLOIDAL SILVER; OXIDE; IO3; ADSORPTION; NANOSHEETS; WATER; IONS;

D O I：

10.1016/j.cej.2021.131629

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Effectively remove radioactive iodine from aqueous solutions is highly desirable for the purpose of radioactive liquid waste treatment. However, anionic radioiodine species do not prefer to sorb on minerals or inorganic sorbents. Herein, we report a stable millimeter-level bismuth-based polymer composite beads (delta-Bi2O3@PES) with fast removal kinetics and high adsorption capacities for both iodide (I-) and iodate (IO3-). Abundant micro flower-like delta-Bi2O3 was embedded in the porous interconnection network of polymer composite beads, making it an effective adsorbent for removing radioactive iodine. delta-Bi2O3@PES composite beads showed high adsorption capacities of 95.4 mg/g and 170.6 mg/g for I- and IO3- by forming an insoluble Bi4I2O5 and BiOIO3 phase, respectively, which also can selectively remove iodine anions in the presence of large excesses of NO3- and SO42-. Furthermore, delta-Bi2O3@PES composite beads can highly reduce the Bi-3(+) leaching of delta-Bi2O3 powder after immersed in the acid solution and can be easily separated from the liquid after sorption. The performance of delta-Bi2O3@PES in dynamic column experiments indicates that economical Bi-based composite bead is a promising candidate sorbent for environmental remediation of actual iodine-contaminated water.

引用

页数：10