Ecological Risk Assessment of Neodymium and Yttrium on Rare Earth Element Mine Sites in Ganzhou, China
| Autor: | Rongliang Qiu, Erkai He, Ye-Tao Tang, Si-Qi Xie, Xing Shi, Chun-Mei Zhao, Wen-Shen Liu |
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| Rok vydání: | 2019 |
| Předmět: |
China
Soil test Health Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences Toxicology Risk Assessment 01 natural sciences Mining Soil Soil Pollutants Yttrium Organic matter Triticum 0105 earth and related environmental sciences Neodymium chemistry.chemical_classification Rare-earth element Vigna 04 agricultural and veterinary sciences General Medicine Pollution Tailings Hazard quotient Phytoremediation Biodegradation Environmental chemistry Environmental chemistry Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science |
| Zdroj: | Bulletin of Environmental Contamination and Toxicology. 103:565-570 |
| ISSN: | 1432-0800 0007-4861 |
| DOI: | 10.1007/s00128-019-02690-2 |
| Popis: | Nowadays rare earth elements (REEs) are widely applied in high-technology and clean energy products, but their environmental risks are still largely unknown. To estimate the ecological risk of REEs, soil samples were collected from REE mine tailings with and without phytoremediation. The results showed that the tailings had rather low organic matter and high total REE concentrations, up to 808.5 mg/kg. The 10% effective concentration (EC10) of neodymium (Nd) and yttrium (Y) were calculated based on the toxicity tests of seed germination and root growth. For both wheat and mung bean, the EC10 of Nd and Y in soils were in the range of 1053.1-1300.1 mg/kg. The average hazard quotient of mine tailing soil without phytoremediation was higher than that with phytoremediation. All the hazard quotient of Nd and Y were less than 1, indicating that Nd or Y alone was unlikely to cause adverse ecological effects. Given to the coexistence of REEs on mine sites, the ecological risk of REE mixture could be potentially high towards local soil environments, even for soils with phytoremdiation. |
| Databáze: | OpenAIRE |
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