In Vitro Digestion of Tire Particles in a Fish Model (Oncorhynchus mykiss): Solubilization Kinetics of Heavy Metals and Effects of Food Coingestion,Environmental Science & Technology

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In Vitro Digestion of Tire Particles in a Fish Model (Oncorhynchus mykiss): Solubilization Kinetics of Heavy Metals and Effects of Food Coingestion
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-11-22 , DOI: 10.1021/acs.est.1c04385
Thibault Masset ₁ , Benoit J D Ferrari _{2,

3} , Dean Oldham ₄ , William Dudefoi ₅ , Matteo Minghetti ₄ , Kristin Schirmer _{5,

6,

7} , Alan Bergmann ₃ , Etienne Vermeirssen ₃ , Florian Breider ₁

Affiliation

Tire and road wear particles (TRWP) have been shown to represent a large part of anthropogenic particles released into the environment. Nevertheless, the potential ecological risk of TRWP in the different environmental compartments and their potential toxic impacts on terrestrial and aquatic organisms remain largely underinvestigated. Several heavy metals compose TRWP, including Zn, which is used as a catalyst during the vulcanization process of rubber. This study investigated the solubilization potential of metals from cryogenically milled tire tread (CMTT) and TRWP in simulated gastric fluids (SF_GASTRIC) and simulated intestinal fluids (SF_INTESTINAL) designed to mimic rainbow trout (Oncorhynchus mykiss) gastrointestinal conditions. Our results indicate that the solubilization of heavy metals was greatly enhanced by gastrointestinal fluids compared to that by mineral water. After a 26 h in vitro digestion, 9.6 and 23.0% of total Zn content of CMTT and TRWP, respectively, were solubilized into the simulated gastrointestinal fluids. Coingestion of tire particles (performed with CMTT only) and surrogate prey items (Gammarus pulex) demonstrated that the animal organic matter reduced the amount of bioavailable Zn solubilized from CMTT. Contrastingly, in the coingestion scenario with vegetal organic matter (Lemna minor), high quantities of Zn were solubilized from L. minor and cumulated with Zn solubilized from CMTT.

中文翻译：

鱼模型中轮胎颗粒的体外消化 (Oncorhynchus mykiss)：重金属的溶解动力学和食物摄入的影响

轮胎和道路磨损颗粒 (TRWP) 已被证明代表了释放到环境中的大部分人为颗粒。然而，TRWP 在不同环境部分的潜在生态风险及其对陆地和水生生物的潜在毒性影响在很大程度上仍未得到充分研究。几种重金属构成 TRWP，包括 Zn，它在橡胶硫化过程中用作催化剂。本实验研究从低温研磨轮胎胎面（CMTT）和TRWP金属的溶解电位在模拟胃液（SF_胃癌）和模拟肠液（SF_肠设计为模拟虹鳟鱼）（虹鳟) 胃肠道疾病。我们的结果表明，与矿泉水相比，胃肠液对重金属的溶解作用大大增强。在体外消化26 小时后，CMTT 和 TRWP 总锌含量的 9.6% 和 23.0% 分别溶解到模拟胃肠液中。轮胎颗粒（仅使用 CMTT 进行）和替代猎物（Gammarus pulex）的共摄入表明，动物有机物减少了从 CMTT 溶解的生物可利用锌的量。相比之下，在与植物有机质（Lemna minor）共摄入的情况下，大量的 Zn 从L. minor中溶解，并与从 CMTT 中溶解的 Zn 累积。

更新日期：2021-12-07

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