this is, really, a big problem. tire particulate is particularly nasty. Internalization, reduced growth, and behavioral effects following exposure to micro and

this is, really, a big problem. tire particulate is particularly nasty. Internalization, reduced growth, and behavioral effects following exposure to micro and nano tire particles in two estuarine indicator species https://doi.org/10.1016/j.chemosphere.2022.133934 https://doi.org/10.1016/j.chemosphere.2022.133934 >The presence of adverse effects in M. beryllina and A. bahia indicate that even at current environmental levels of tire-related pollution, which are expected to continue to increase, aquatic ecosystems may be experiencing negative impacts. Toxicity of micro and nano tire particles and leachate for model freshwater organisms https://doi.org/10.1016/j.jhazmat.2022.128319 https://doi.org/10.1016/j.jhazmat.2022.128319 >TP leachate was the main driver of toxicity for D. magna and larval zebrafish. Exposure to nano TPs enhanced toxicity in comparison to leachate alone. A ubiquitous tire rubber–derived chemical induces acute mortality in coho salmon https://www.science.org/doi/10.1126/science.abd6951 https://www.science.org/doi/10.1126/science.abd6951 >Regular acute mortality events are tied, in particular, to stormwater runoff, but the identity of the causative toxicant(s) has not been known. Starting from leachate from new and aged tire tread wear particles, Tian et al. followed toxic fractions through chromatography steps, eventually isolating a single molecule that could induce acute toxicity at threshold concentrations of ∼1 microgram per liter. Tire-wear-particle leachate toxicity to Americamysis bahia: analysis of sublethal and molecular effects https://cedar.wwu.edu/wwuet/1132/ https://cedar.wwu.edu/wwuet/1132/ >There were 80 dysregulated contigs across all tested weathered leachate concentrations and 139 dysregulated contigs across all tested un-weathered concentrations. [...] Many contig sequences mapped to gene descriptions that regulated physical body structure, inflammatory response, and mediated protein-protein interactions, signifying that TWP leachate exposure disrupts many internal molecular processes in A. bahia. Tribes Petition Environmental Protection Agency to Ban Toxic Chemical from Tires https://earthjustice.org/press/2023/tribes-petition-environmental-protection-agency-to-ban-toxic-chemical-from-tires https://earthjustice.org/press/2023/tribes-petition-environm... >When 6PPD reacts with ground-level ozone, it breaks down into 6PPD-q — the second most toxic chemical to aquatic species ever evaluated by the EPA. Exposure to 6PPD-q can kill coho salmon within hours, and the chemical is responsible for “urban runoff mortality syndrome,” which kills up to 100% of coho returning to spawn in urban streams. The Tribes contend that 6PPD in tires poses unreasonable risks to the environment, requiring the EPA to regulate the chemical under the Toxic Substances Control Act (TSCA).