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dc.contributor.authorGong, Bing
dc.contributor.authorHe, Erkai
dc.contributor.authorXia, Bing
dc.contributor.authorYing, Rongrong
dc.contributor.authorPeijnenburg, Willie J G M
dc.contributor.authorLiu, Yang
dc.contributor.authorQiu, Hao
dc.date.accessioned2020-10-04T18:27:43Z
dc.date.available2020-10-04T18:27:43Z
dc.date.issued2020-09-22
dc.identifier.issn1090-2414
dc.identifier.pmid32977285
dc.identifier.doi10.1016/j.ecoenv.2020.111346
dc.identifier.urihttp://hdl.handle.net/10029/624414
dc.description.abstractIt is a daunting challenge to predict toxicity and accumulation of rare earth metals (REMs) in different exposure scenarios (e.g., varying water chemistry and metal combinations). Herein, we investigated the toxicity and uptake of La and Ce in the presence of various levels of Ca, Mg, Na, K, and at different pH values, as well as the combined effects of La and Ce in wheat Triticum aestivum. Major cations (Ca2+ and Mg2+) significantly mitigated the toxicity and accumulation of La3+/Ce3+. Toxicity and uptake of La, Ce, and La-Ce mixtures could be well quantified by the multi-metal biotic ligand model (BLM) and by the Langmuir-type uptake model with the consideration of the competitive effects of Ca2+ and Mg2+, with more than 85.1% of variations explained. The derived binding constants of Ca, Mg, La, and Ce to wheat root were respectively 3.87, 3.59, 6.97, and 6.48 on the basis of toxicity data, and 3.23, 2.84, 6.07, and 5.27 on the basis of uptake data. The use of the alternative WHAM-Ftox approach, requiring fewer model parameters than the BLM but with similar Akaike information criterion (AIC) values, successfully predicted the toxicity and accumulation of La/Ce as well as toxicity of La-Ce mixtures, with at least 76.4% of variations explained. However, caution should be taken when using this approach to explain the uptake of La-Ce mixtures. Our results provided promising tools for delineating REMs toxicity/uptake in the presence of other toxicity-modifying factors or in mixture scenarios.en_US
dc.language.isoenen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectBLMen_US
dc.subjectBioavailabilityen_US
dc.subjectRare earth metalsen_US
dc.subjectToxicityen_US
dc.subjectUptakeen_US
dc.subjectWHAM-F(tox)en_US
dc.titleBioavailability and phytotoxicity of rare earth metals to Triticum aestivum under various exposure scenarios.en_US
dc.typeArticleen_US
dc.identifier.journalcotoxicol Environ Safe 2020; 205:111346en_US
dc.source.journaltitleEcotoxicology and environmental safety


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