Investigation of potential anthropogenic pollution of rare metals in Tama River followed by establishment of a comprehensive multielement analysis of major-to-ultratrace elements in river water and sewage treatment effluent
Investigation of potential anthropogenic pollution of rare metals in Tama River followed by establishment of a comprehensive multielement analysis of major-to-ultratrace elements in river water and sewage treatment effluent
复制标题
调查多摩川稀有金属的潜在人为污染，并建立河水和污水处理出水中主要至超痕量元素的综合多元素分析
DOI：
10.1007/s44211-023-00287-8
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发表时间：
2023
影响因子：
1.6
通讯作者：
Itoh Akihide
中科院分区：
文献类型：
--
作者：
Yaida Akane;Otsuka Riko;Yamada Asaki;Nakano Kazuhiko;Itoh Akihide
采用电感耦合等离子体质谱(ICPMS)、络合固相萃取(SPE)/电感耦合等离子体质谱(ICPMS)和回流式加热酸解/络合固相萃取/电感耦合等离子体质谱(ICPMS)三种分析方法，对城市河流和污水处理厂出水中的至少53种元素进行了全面的多元素分析，其中包括40种稀有金属。络合固相萃取与回流式加热酸分解相结合，可以有效地降解污水处理出水中的EDTA等有机物，提高了污水处理出水中某些元素的回收率。特别是回流型加热酸分解/络合固相萃取/电感耦合等离子体质谱(SPE/ICP-MS)方法，实现了Co、In、Eu、Pr、Sm、Tb和Tm的测定，这些元素在没有这种分解过程的情况下是很难测定的。利用建立的分析方法对塔玛河稀有金属潜在的人为污染进行了研究。结果，来自污水处理出水进水区的河水样品中有25种元素比清洁区高出几到几十倍。其中，Mn、Co、Ni、Ge、Rb、Mo、Cs、Gd、Pt的浓度比清水增加了一个数量级以上。这些因素被认为是PAP。5个污水处理厂出水中Gd浓度在60~120 ng L−1之间，是清水中Gd浓度的40~80倍，所有污水处理厂出水中Gd浓度都有一定的升高。这表明在所有污水处理流出物中都发生了磁共振造影剂泄漏。此外，所有污水处理出水中的16种稀有金属元素(Li、B、Ti、Cr、Mn、Ni、Ga、Ge、Se、Rb、Mo、In、Cs、Ba、W和Pt)的含量均高于清洁河水中的含量，表明许多稀有金属元素可能是PAP。在污水处理出水合并后的河水中，Gd和In的浓度高于大约20年前的报告值。
In this study, comprehensive multi-element analysis of at least 53 elements, including 40 rare metals, in river water at all points from upstream to the estuary in urban rivers and sewage treatment effluent was established using three analytical methods of ICP-MS, chelating solid-phase extraction (SPE)/ICP-MS, and reflux-type heating acid decomposition/chelating SPE/ICP-MS. Recoveries of some elements for sewage treatment effluent in chelating SPE were improved by being combined with reflux-type heating acid decomposition, because organic substances, such as EDTA, in sewage treatment effluent could be effectively decomposed. In particular, the reflux-type heating acid decomposition/chelating SPE/ICP-MS method enabled the determination of Co, In, Eu, Pr, Sm, Tb, and Tm, which had been difficult to determine in chelating SPE/ICP-MS without this decomposition procedure. A potential anthropogenic pollution (PAP) of rare metals in Tama River was investigated by the established analytical methods. As a result, 25 elements in river water samples from the inflow area of sewage treatment effluent were several to several dozen times higher than those in the clean area. In particular, the concentrations of Mn, Co, Ni, Ge, Rb, Mo, Cs, Gd, and Pt increased by more than one order of magnitude compared to the river water from clean area. These elements were suggested to be PAP. The concentrations of Gd in the effluents from five sewage treatment plants ranged from 60 to 120 ng L−1, 40 to 80 times higher than those in clean river water, and all sewage treatment plants effluents showed the definite elevation of Gd concentrations. This indicates that MRI contrast agent leakage is occurring in all sewage treatment effluents. In addition, concentrations of 16 rare metal elements (Li, B, Ti, Cr, Mn, Ni, Ga, Ge, Se, Rb, Mo, In, Cs, Ba, W, and Pt) in all sewage treatment effluents were higher than those in clean river water, suggesting that many rare metal elements may be PAP. In the river water after the merging of sewage treatment effluent, the concentrations of Gd and In were higher than the reported values about 20 years ago.Graphical abstract