2025-05-06 スイス連邦工科大学ローザンヌ校(EPFL)
<関連情報>
- https://actu.epfl.ch/news/tire-additives-found-deposited-on-fruits-and-veget/
- https://www.sciencedirect.com/science/article/pii/S0304389425013470
タイヤ由来の添加物とその代謝物の果実、根菜、葉菜類への混入の評価とスイス成人における食事からの摂取量の評価 Assessment of tire-derived additives and their metabolites into fruit, root and leafy vegetables and evaluation of dietary intake in Swiss adults
Florian Breider, Thibault Masset, Kelyan Prud’homme, Beat J. Brüschweiler
Journal of Hazardous Materials Available online: 30 April 2025
DOI:https://doi.org/10.1016/j.jhazmat.2025.138432
Graphical Abstract
Highlights
- Tire-derived additives were detected in fruit, root, and leafy vegetables.
- 6-PPD and DPG were among the most frequently detected compounds.
- Daily dietary intake of these contaminants was quantified for the first time.
Abstract
Tire wear particles, released at an estimated 6 million tons annually worldwide, introduce various chemical substances into agricultural environments through atmospheric deposition, road runoff, and reclaimed wastewater. These tire-derived compounds are known to impact ecosystem health. This study investigates the transfer of such additives and their metabolites into vegetables, assessing human dietary intake. Using UPLC-MS/MS, eleven tire-related compounds were analyzed in 100 vegetable samples from nine Swiss retailers, including leafy (lettuce, cabbage, spinach), root (onion, potato, carrot), and fruit (tomato, bell pepper, zucchini, pumpkin) vegetables. Contamination was detected in all vegetable varieties. 31 % of the 100 samples contained benzothiazole (BTH), 1,3-diphenylguanidine (DPG), 6-PPD, or 1,3-dicyclohexylurea (DCU) at levels exceeding the limit of quantification (LOQ) whereas blank values remained below LOD. DPG was most frequently detected (18 %, n = 100), followed by 6-PPD (15 %, n = 100), DCU (10 %, n = 100), and BTH (3 %, n = 100). Spinach comprised 78 % of DPG-positive leafy samples. Daily intakes of 6-PPDQ, DCU, 6-PPD, and DPG from vegetables were estimated at 0–18.7, 0–57.7, 0–42.3, and 0–42.4 ng/person/day, respectively. While current toxicological data suggest no immediate health concerns, significant knowledge gaps remain regarding long-term toxicity. This study offers critical insights into the presence of tire-derived substances in agriculture and underscores the need for further research to better assess environmental and human health risks.
