Abstract：
Little research exists on the magnitude, variability, and uncertainty of human exposure to airborne micro- and nanoplastics (AMNPs), despite their critical role in human exposure to MNPs. We probabilistically estimate the global intake of AMNPs through three main pathways: indoor inhalation, outdoor inhalation, and ingestion during indoor meals, for both children and adults. The median inhalation of AMPs is 1,207.7 (90% CI, 42.5-8.48 × 104) and 1,354.7 (90% CI, 47.4-9.55 × 104) N/capita/day for children and adults, respectively. The annual intake of AMPs is 13.18 mg/capita/a for children and 19.10 mg/capita/a for adults, which is approximately one-fifth and one-third of the mass of a standard stamp, assuming a consistent daily intake of medians. The majority of AMP number intake occurs through inhalation, while the ingestion of deposited AMPs during meals contributes the most in terms of mass. Furthermore, the median ANP intake through outdoor inhalation is 9,638.1 N/day (8.23 × 10-6 μg/d) and 5,410.6 N/day (4.62 × 10-6 μg/d) for children and adults, respectively, compared to 5.30 × 105 N/day (5.79 × 10-4 μg/d) and 6.00 × 105 N/day (6.55 × 10-4 μg/d) via indoor inhalation. Considering the increased toxicity of smaller MNPs, the significant number of ANPs inhaled warrants great attention. Collaborative efforts are imperative to further elucidate and combat the current MPN risks.
摘要：
关于大小的研究很少，可变性，以及人类暴露于空气中的微米和纳米塑料(AMNP)的不确定性，尽管它们在人类暴露于MNPs中起关键作用。我们通过三种主要途径对全球AMNP的摄入量进行概率估计：室内吸入，户外吸入,以及在室内用餐时的摄入，对于儿童和成人。儿童和成人的AMPs吸入中位数为1,207.7（90％CI，42.5-8.48×104）和1,354.7（90％CI，47.4-9.55×104）N/人均/天，分别。儿童的AMPS年摄入量为13.18毫克/人均/a，成人为19.10毫克/人均/a，大约是标准邮票质量的五分之一和三分之一，假设每天的中位数摄入量一致。大多数AMP数量的摄入是通过吸入发生的，而在进餐期间摄入沉积的AMP在质量方面贡献最大。此外，儿童和成人通过室外吸入的平均ANP摄入量为9,638.1N/天（8.23×10-6μg/d）和5,410.6N/天（4.62×10-6μg/d），分别,室内吸入分别为5.30×105N/天（5.79×10-4μg/d）和6.00×105N/天（6.55×10-4μg/d）。考虑到较小MNPs的毒性增加，吸入的大量ANP值得高度重视。必须共同努力，以进一步阐明和应对当前的MPN风险。
