ArticleAnalytical sciences : the international journal of the Japan Society for Analytical Chemistry2023
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.
Article in Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
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
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