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HNO3 浓度对新型硅胶基吸附剂分离模拟高放废液中 Pd(II)的影响。

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

机构信息

Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan, 430073, China.

出版信息

Sci Rep. 2017 Sep 12;7(1):11290. doi: 10.1038/s41598-017-11879-6.

DOI:10.1038/s41598-017-11879-6
PMID:28900306
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5595992/
Abstract

A new kind of silica-based (Crea + TODGA)/SiO-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)/SiO-P adsorbent and stability of adsorbent against HNO solution were investigated by batch method. The degradation parts of (Crea + TODGA)/SiO-P dissolved in liquid phase were estimated by total organic carbon (TOC) analyzer. (Crea + TODGA)/SiO-P adsorbent showed good selectivity adsorption for Pd(II) and reached equilibrium within 24 hr. The adsorption ability of (Crea + TODGA)/SiO-P for Pd(II) and the content of TOC leaked decreased with the increasing of HNO concentration. In 3 M HNO, the average of K values were 85.03 cm/g and 26.10 cm/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)/SiO-P can be proposed as an applicable and efficient absorbent for separation of Pd(II) in 3 M HNO at 298 K.

摘要

一种新型基于二氧化硅的（Crea+TODGA）/SiO-P 吸附剂，对钯（Pd）具有高选择性吸附，用于研究高放废液（HLLW）的分离过程。采用间歇法研究了 Pd(II)在（Crea+TODGA）/SiO-P 吸附剂上的吸附行为以及吸附剂在 HNO 溶液中的稳定性。通过总有机碳（TOC）分析仪估算了溶解在液相中的（Crea+TODGA）/SiO-P 的降解部分。（Crea+TODGA）/SiO-P 吸附剂对 Pd(II)具有良好的选择性吸附，在 24 小时内达到平衡。（Crea+TODGA）/SiO-P 对 Pd(II)的吸附能力和 TOC 泄漏量随 HNO 浓度的增加而降低。在 3 M HNO 中，298 K 和 323 K 下接触时间为 1 至 28 天，K 值的平均值分别为 85.03 cm/g 和 26.10 cm/g。而在 28 天后，从吸附剂中泄漏的 TOC 含量分别为 1095 ppm（298 K）和 2989 ppm（323 K）。因此，该吸附剂在长时间接触硝酸后，在 298 K 下表现出良好的稳定性。所有结果表明，（Crea+TODGA）/SiO-P 可作为一种适用且有效的吸附剂，用于 298 K 下 3 M HNO 中 Pd(II)的分离。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/626b806b73d1/41598_2017_11879_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/552135beb250/41598_2017_11879_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/06135a8ac36c/41598_2017_11879_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/6c359ef29c2c/41598_2017_11879_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/b559f4a3e232/41598_2017_11879_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/977c0086b7e9/41598_2017_11879_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/6bc1ac09c2b9/41598_2017_11879_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/992d0bdde1bc/41598_2017_11879_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/3b7af91ddf21/41598_2017_11879_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/626b806b73d1/41598_2017_11879_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/552135beb250/41598_2017_11879_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/06135a8ac36c/41598_2017_11879_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/6c359ef29c2c/41598_2017_11879_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/b559f4a3e232/41598_2017_11879_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/977c0086b7e9/41598_2017_11879_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/6bc1ac09c2b9/41598_2017_11879_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/992d0bdde1bc/41598_2017_11879_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/3b7af91ddf21/41598_2017_11879_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0857/5595992/626b806b73d1/41598_2017_11879_Fig9_HTML.jpg

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