Effect of HNO3 concentration on a novel silica-based adsorbent for separating Pd(II) from simulated high level liquid waste

被引：8

作者：

Guo Ge ^{[1
]}

Xu Yuanlai ^{[1
]}

Yang Xinxin ^{[1
]}

Wang Fen ^{[1
]}

Zhou Fang ^{[1
]}

Yu Junxia ^{[1
]}

Chi Ruan ^{[1
]}

机构：

[1] Wuhan Inst Technol, Key Lab Green Chem Proc, Hubei Key Lab Novel Reactor & Green Chem Technol, Minist Educ, Wuhan 430073, Hubei, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

基金：

中国国家自然科学基金;

关键词：

PLATINUM-GROUP METALS; NITRIC-ACID; SOLVENT-EXTRACTION; MINOR ACTINIDES; PALLADIUM; RHODIUM;

D O I：

10.1038/s41598-017-11879-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A new kind of silica-based (Crea + TODGA)/SiO2-P adsorbent with high selectivity adsorption for palladium (Pd) was synthesized to examined the applicability for partitioning process of high level liquid waste (HLLW). Adsorption behavior of Pd(II) towards (Crea + TODGA)/SiO2-P adsorbent and stability of adsorbent against HNO3 solution were investigated by batch method. The degradation parts of (Crea + TODGA)/SiO2-P dissolved in liquid phase were estimated by total organic carbon (TOC) analyzer. (Crea + TODGA)/SiO2-P adsorbent showed good selectivity adsorption for Pd(II) and reached equilibrium within 24 hr. The adsorption ability of (Crea + TODGA)/SiO2-P for Pd(II) and the content of TOC leaked decreased with the increasing of HNO3 concentration. In 3 M HNO3, the average of K-d values were 85.03 cm(3)/g and 26.10 cm(3)/g after contact time one to 28 days at 298 K and 323 K, respectively. While the content of TOC leaked from the adsorbent after 28 days were 1095 ppm (298 K) and 2989 ppm (323 K), respectively. Therefore, the adsorbent showed good stability at 298 K after contact with nitric acid for a long time. All results indicated (Crea + TODGA)/SiO2-P can be proposed as an applicable and efficient absorbent for separation of Pd(II) in 3 M HNO3 at 298 K.

引用

页数：9

共 21 条

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