Measurements and future projections of Gd-based contrast agents for MRI exams in wastewater treatment plants in the Tokyo metropolitan area
Measurements and future projections of Gd-based contrast agents for MRI exams in wastewater treatment plants in the Tokyo metropolitan area
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东京都地区废水处理厂 MRI 检查用钆基造影剂的测量和未来预测
DOI：
10.1016/j.marpolbul.2021.113259
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发表时间：
2022
影响因子：
5.8
通讯作者：
Natarajan Thennaarassan
中科院分区：
文献类型：
--
作者：
Inoue Kazumasa;Fukushi Masahiro;Sahoo Sarata Kumar;Veerasamy Nimelan;Furukawa Akira;Soyama Sho;Sakata Ami;Isoda Ryo;Taguchi Yoshiaki;Hosokawa Shota;Sagara Hiroaki;Natarajan Thennaarassan
磁共振成像(MRI)中使用了大量的基于Gd的造影剂，然后这些造影剂会从尿液中排出。这些试剂随后被排放到环境中，因为它们很难通过常规的污水处理技术去除。在本研究中，通过对废水样品的分析，确定了废水处理过程中Gd异常的变化，并根据Gd异常与使用的MRI设备数量之间的关系，评估了未来预测变化的可能性。污水处理后，最终出水比进水增加1.8倍，出水Gd异常与MRI设备数呈正相关。这一发现表明，根据核磁共振设备的数量，环境影响的变化是可以预测的。
Large amounts of Gd-based contrast agents are used in magnetic resonance imaging (MRI) that are then excreted in urine. These agents are subsequently discharged into the environment because they are difficult to remove by usual sewage treatment techniques. In this study, changes of the Gd anomaly during wastewater treatment processes were determined by analyzing wastewater samples and the possibility for future prediction of the changes was evaluated based on the relationship between the Gd anomaly and the number of MRI devices in use. After the wastewater treatment processes, the values of final effluent were increased 1.8 times compared to those of influent, and the Gd anomaly of effluent had a positive correlation to the number of MRI devices. The finding suggested that the changes of environmental impact were predictable based on the number of MRI devices.