Recycling Gadolinium from Hospital Effluent via Electrochemical Aerosol Formation
Recycling Gadolinium from Hospital Effluent via Electrochemical Aerosol Formation
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通过电化学气溶胶形成从医院废水中回收钆
DOI：
10.1021/acsestengg.3c00377
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发表时间：
2023
影响因子：
7.1
通讯作者：
Luo, Long
中科院分区：
文献类型：
--
作者：
Ranaweera, Ruchiranga;Wijesinghe, Sethma;Weerarathna, Udeshika;Chowdhury, Aneesa;Kajjam, Aravind Babu;Wang, Bingwen;Dittrich, Timothy M.;Allen, Matthew J.;Luo, Long
医院和研究中心越来越多地使用基于Gd的造影剂进行磁共振成像，导致对地表水中Gd和Gd异常的需求迅速增长。回收医院污水中的Gd可以同时解决对Gd的需求和对Gd污染的严重担忧。在这里，我们提出了一项相关的研究，通过配体辅助的电化学气溶胶形成(LEAFE)过程从含有十亿分之一级Gd的医院污水中提取和预浓缩Gd。我们证明，叶过程从添加了50 ppb Gd的水样中提取75%的GdIII，包括稀释的人工尿样，同时将Gd预浓缩高达390倍。机理研究证实，Gd结合配体的表面活性是成功提取叶片所必需的。通过在折纸设备中进行电泳分离，然后水提取，配体是可回收的。折纸装置中陡峭的pH梯度和较强的电场使Gd-配体络合物解离，Gd和配体在空间上分离，并沉淀出Gd(OH)3。约80%的配体通过水提取从纸器中回收并在随后的提取循环中重复使用。该方法简单、环保，将来也可应用于其他含水稀土金属废料的处理。
The increasing use of Gd-based contrast agents for magnetic resonance imaging at hospitals and research centers has led to the rapidly growing demand for Gd and Gd anomalies in surface waters. Recycling Gd from hospital effluents could simultaneously address Gd demand and severe concerns about Gd contamination. Here, we present a study relevant to the extraction and preconcentration of Gd from hospital effluents that contain parts per billion-level Gd via the ligand-assisted electrochemical aerosol formation (LEAF) process. We demonstrate that the LEAF process extracts ∼75% GdIIIfrom 50 ppb Gd-spiked water samples, including diluted artificial urine samples while preconcentrating Gd by up to 390-fold. Mechanistic studies confirm that the surface activity of the Gd-binding ligand is essential for successful LEAF extraction. The ligands are recyclable by performing electrophoretic separation in an origami paper device, followed by water extraction. The steep pH gradient and strong electric field in the origami paper device enabled the dissociation of Gd-ligand complexes, spatial separation of Gd and ligand, and precipitation of GdIIIas Gd(OH)3. Approximately 80% of the ligands were recovered from the paper device by water extraction and reused in subsequent extraction cycles. This straightforward and green method could also be adapted to other aqueous rare earth metal wastes in the future.
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钆足迹：从摇篮到摇篮？
DOI：
--
发表时间：
2020
期刊：
Journal of neuroradiology = Journal de neuroradiologie
影响因子：
--
作者：
Julien Ognard;J. Barrat;A. Chazot;Z. Alavi;Douraied BEN SALEM
通讯作者：
Douraied BEN SALEM
影响因子：
4.3
作者：
Loreti, V;Bettmer, J
通讯作者：
Bettmer, J
影响因子：
18.2
作者：
Dong Z;Mattocks JA;Deblonde GJ;Hu D;Jiao Y;Cotruvo JA Jr;Park DM
通讯作者：
Park DM
影响因子：
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作者：
Barge, Alessandro;Cravotto, Giancarlo;Fedeli, Franco
通讯作者：
Fedeli, Franco
影响因子：
19.7
作者：
McDonald, Robert J.;Levine, Deborah;Kressel, Herbert Y.
通讯作者：
Kressel, Herbert Y.