Nano-sized Zero-Valent Iron Coupled with Sulfidation and Ferrous Implantation Enhances the Reduction–Oxidation Removal of Iodinated Contrast Medium
Nano-sized Zero-Valent Iron Coupled with Sulfidation and Ferrous Implantation Enhances the Reduction–Oxidation Removal of Iodinated Contrast Medium
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纳米零价铁结合硫化和亚铁注入增强碘造影剂的还原氧化去除
DOI：
10.1021/acsestwater.1c00199
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发表时间：
2021-08
期刊：
影响因子：
--
通讯作者：
Mu Yang
中科院分区：
文献类型：
--
作者：
Zhou Guannan;Chen Jia-Qi;He Chuan-Shu;Ding Rongrong;Mu Yang
纳米零价铁（nZVI）结合硫化和亚铁植入（S-nZVI/Fe 2+）的可行性和机制，特别是用于去除碘化造影剂（ICM）的可行性和机制知之甚少。研究表明，在中性好氧条件下，S-nZVI/Fe 2+可有效去除ICM中的泛影葡胺（DTA）。S-nZVI/Fe ~（2+）体系的DTA降解速率显著提高，其去除速率常数分别是nZVI、nZVI/Fe ~（2+）和S-nZVI体系的38.2、29.5和13.0倍。产物分析和活性物种的检测表明，在好氧条件下，S-nZVI/Fe 2+增强了DTA的还原和氧化去除。硫化和Fe ~（2+）离子注入的耦合作用可使溶液pH值维持在5左右，延缓O ~ 2对Fe（0）的消耗，从而促进Fe（0）的腐蚀。这种效应不仅抑制了生成的原子氢的复合，而且促进了生成·OH的类Fenton反应，从而增强了DTA的去除，包括两个基本阶段：有效脱碘阶段和温和氧化阶段。一般来说，这些研究结果提供了新的见解，以提高复杂的ICM在温和条件下，通过增强的nZVI策略的去除效率。
The feasibility and mechanism of nanosized zerovalent iron (nZVI) coupled with sulfidation and ferrous implantation (S-nZVI/Fe2+) especially for the removal of iodinated contrast medium (ICM) are poorly known. This study showed that the efficient removal of ICM diatrizoate (DTA) could be achieved by S-nZVI/Fe2+under neutral and aerobic conditions. The DTA degradation rate was significantly elevated in the S-nZVI/Fe2+system, with an increase of 38.2, 29.5, and 13.0 times the removal rate constants compared with those of the nZVI, nZVI/Fe2+and S-nZVI systems, respectively. Analysis of the products and detection of reactive species suggested that both the reductive and oxidative removal of DTA were enhanced by S-nZVI/Fe2+under aerobic conditions. The coupled effect of sulfidation and Fe2+implantation could maintain the solution pH around 5 and retard the consumption of Fe(0) by O2, thereby promoting the corrosion of Fe(0). This effect not only inhibited the recombination of the generated atomic hydrogen but also facilitated the Fenton-like reaction for•OH production, resulting in enhanced DTA removal with two fundamental stages: the efficient deiodination stage and the mild oxidation stage. Generally, these findings provided new insights into improving the removal efficiency of complicated ICM under mild conditions through an enhanced-nZVI strategy.
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影响因子：
11.4
作者：
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通讯作者：
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纳米零价铁有氧去除碘造影剂：氧化与还原的结合
影响因子：
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作者：
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作者：
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影响因子：
11.4
作者：
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通讯作者：
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影响因子：
12.8
作者：
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通讯作者：
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