https://scholars.lib.ntu.edu.tw/handle/123456789/629756
標題: | Revealing the toxicity of monovalent and trivalent thallium to medaka fish in controlled exposure conditions | 作者: | Yang, Ching-Hsin Tan, Shih-Wei Cheng, Chiung-Ju PEI-JEN CHEN |
關鍵字: | Bioconcentration; Matrix effect; Potassium (K) competition; Technology critical elements (TCEs); Thallium (Tl) speciation | 公開日期: | 九月-2022 | 出版社: | ELSEVIER | 卷: | 250 | 來源出版物: | Aquatic toxicology (Amsterdam, Netherlands) | 摘要: | Thallium (Tl) is a rare earth element increasingly being used in high-technology manufacturing. It is also an emerging pollutant with high exposure and toxicity risks to aquatic ecosystems. Tl exists in the environment in a monovalent [thallous, Tl(I)] or trivalent [thallic, Tl(III)] state. Currently, the stability of the two Tl species in natural water is uncertain and the toxicity in algae and daphnia are inconsistent due to lack of robust characterization of Tl species and matrix effects, while studies with fish are sparse. In this study, larvae of medaka fish (Oryzias latipes) were dosed with environmentally relevant concentrations of Tl(I) or Tl(III) spiked into synthetic and natural river water for 7 days to observe the toxic effects of two Tl species on fish. The transformation of Tl(I) and Tl(III) in water was analyzed by high performance liquid chromatography coupled with inductively coupled plasma and mass spectrometry. Analytical and toxicity results showed that Tl(I) is more stable presenting higher mortality and bioconcentration in medaka than Tl(III) in different water matrices. Tl(I)-induced LC50 and body burden in treated fish were highly correlated with its competitive ion, potassium (K), especially in waters containing medium K levels. This study provides reliable evidence regarding the stability and toxicity of Tl(I) and Tl(III) as well as the interaction of aqueous K versus Tl(I) in fish. Such information is useful for justifying water-quality guidelines and ecological risks of Tl pollution in natural water ecosystems. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/629756 | ISSN: | 0166-445X | DOI: | 10.1016/j.aquatox.2022.106258 |
顯示於: | 農業化學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。