Bluteau Gabriel, Ponton Dominic E, Rosabal Maikel, Amyot Marc
GRIL, Département des Sciences Biologiques, Université de Montréal (UdeM), 1375, Thérèse-Lavoie-Roux Ave., Montréal, Québec H2 V 0B3, Canada.
GRIL, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), 141 Avenue du Président-Kennedy, Montréal, Québec H2X 1Y4, Canada.
Environ Sci Technol. 2025 Apr 1;59(12):6203-6213. doi: 10.1021/acs.est.4c08750. Epub 2025 Mar 21.
Growing reliance on platinum group elements (PGEs) as critical minerals for emerging technologies raises concerns regarding their ecotoxicological behavior. We studied their environmental fate in various inorganic and biological matrices from Canada using ICP-MS/MS analysis. Our findings confirmed previously published rhodium, palladium, and platinum concentration gradients from road dust to sediments, soils, and water, but differed from the literature reporting high biological contamination, which was not observed in our study. We also conducted experiments using a predator-prey model by exposing to PGE mixtures for 24 h and to contaminated prey () for 8 days, followed by a 3-day excretion period. We estimated water uptake rate constants ( = 1.6-3.5 mL g d), assimilation efficiencies (AEs = 0.024-32.2%), and efflux rate constants ( = 0.51-0.69 d) for four PGEs. Overall, showed poor bioaccumulation and low trophic transfer of the PGEs, which were rapidly excreted. Experimental results supported low detection of PGEs in wild organisms, underscoring the need for caution when interpreting studies reporting high PGE levels in biological matrices. Nonetheless, this study improves our understanding of the PGEs' environmental fate, revealing correlations with several quantitative ion character-activity relationships (QICARs) and highlighting chemical bond softness (σ) as a predictor of biological assimilation and excretion.
对铂族元素（PGEs）作为新兴技术关键矿物的依赖日益增加，引发了人们对其生态毒理行为的担忧。我们使用电感耦合等离子体质谱/质谱分析（ICP-MS/MS）研究了它们在加拿大各种无机和生物基质中的环境归宿。我们的研究结果证实了先前发表的从道路灰尘到沉积物、土壤和水的铑、钯和铂浓度梯度，但与文献中报道的高生物污染情况不同，我们的研究中未观察到这种情况。我们还使用捕食者 - 猎物模型进行了实验，将其暴露于PGE混合物中24小时，并暴露于受污染的猎物（）中8天，随后有3天的排泄期。我们估计了四种PGEs的水吸收速率常数（= 1.6 - 3.5 mL g d）、同化效率（AEs = 0.024 - 32.2%）和流出速率常数（= 0.51 - 0.69 d）。总体而言，显示出PGEs的生物累积性差和营养级转移低，它们会迅速排泄。实验结果支持了在野生生物中PGEs检测率低的情况，强调在解释生物基质中高PGE水平的研究时需要谨慎。尽管如此，这项研究增进了我们对PGEs环境归宿的理解，可以揭示与几种定量离子特征 - 活性关系（QICARs）的相关性，并突出化学键柔软度（σ）作为生物同化和排泄的预测指标。
