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Comprehensive multipathway risk assessment of chemicals associated with recycled ('crumb') rubber in synthetic turf fields

机译：人造草皮领域中与再生（“废料”）橡胶有关的化学品的综合多径风险评估

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Background Thousands of synthetic turf fields in the US are regularly used by millions of individuals (particularly children and adolescents). Although many safety assessments have concluded that there are low or negligible risks related to exposure to chemicals found in the recycled rubber used to make these fields, concerns remain about the safety of this product. Existing studies of recycled rubber's potential health risks have limitations such as small sample sizes and limited evaluation of relevant exposure pathways and scenarios. Objective: Conduct a comprehensive multipathway human health risk assessment (HHRA) of exposure to chemicals found in recycled rubber. Methods: All available North American data on the chemical composition of recycled rubber, as well as air sampling data collected on or near synthetic turf fields, were identified via a literature search. Ingestion, dermal contact, and inhalation pathways were evaluated according to US Environmental Protection Agency (US EPA) guidance, and exposure scenarios for adults, adolescents, and children were considered. Results: Estimated non-cancer hazards and cancer risks for all the evaluated scenarios were within US EPA guidelines. In addition, cancer risk levels for users of synthetic turf field were comparable to or lower than those associated with natural soil fields. Conclusions: This HHRA's results add to the growing body of literature that suggests recycled rubber infill in synthetic turf poses negligible risks to human health. This comprehensive assessment provides data that allow stakeholders to make informed decisions about installing and using these fields.
机译：背景技术在美国，成千上万的人造草皮田地被数百万个人（尤其是儿童和青少年）定期使用。尽管许多安全评估得出的结论是，与用于制造这些领域的再生橡胶中所含化学物质的暴露相关的风险较低或可忽略不计，但仍对该产品的安全性感到担忧。现有的再生橡胶潜在健康风险研究存在局限性，例如样本量小以及对相关暴露途径和情景的评估有限。目的：对暴露于再生橡胶中的化学物质进行全面的多途径人类健康风险评估（HHRA）。方法：通过文献检索，确定了北美所有有关再生橡胶化学成分的可用数据，以及在人造草皮田或附近收集的空气采样数据。根据美国环境保护局（US EPA）的指导评估了摄入，皮肤接触和吸入途径，并考虑了成人，青少年和儿童的接触情况。结果：所有评估情况下的估计非癌症危害和癌症风险均在美国EPA准则之内。另外，人造草皮田使用者的癌症风险水平可与自然土壤田相比或低于自然土壤田。结论：HHRA的结果增加了越来越多的文献，这些文献表明，人造草皮中的再生橡胶填充物对人体健康的影响可忽略不计。这项全面的评估提供的数据使利益相关者可以就安装和使用这些字段做出明智的决定。

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