使い捨てプラスチック製水ボトルの慢性的なリスクは危険なほど研究不足である(The chronic risks from single-use plastic water bottles are dangerously understudied, new Concordia research shows)

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2025-09-09 カナダ・コンコルディア大学

コンコルディア大学の研究は、使い捨てプラスチック水ボトルが放出するマイクロ・ナノプラスチックの慢性的リスクが危険なほど過小評価されていると指摘した。140以上の研究レビューから、人は年間約3.9~5.2万個の粒子を摂取し、ボトル水利用者は水道水利用者より約9万個多く取り込む可能性があると判明。ボトルは製造や輸送、温度変化や日光で劣化し、微細粒子を放出する。これらは体内に入り込み炎症や酸化ストレス、ホルモンかく乱、生殖障害、神経毒性、がんを引き起こす恐れがある。しかし長期影響を測定する標準法や追跡研究は不足している。研究者は常用を避け、教育・規制を強化すべきと提言した。

<関連情報>

Unveiling the hidden chronic health risks of nano- and microplastics in single-use plastic water bottles: A review

Sarah Sajedi, Chunjiang An, Zhi Chen
Journal of Hazardous Materials  Available online: 14 June 2025
DOI:https://doi.org/10.1016/j.jhazmat.2025.138948

Graphical Abstract

使い捨てプラスチック製水ボトルの慢性的なリスクは危険なほど研究不足である(The chronic risks from single-use plastic water bottles are dangerously understudied, new Concordia research shows)

Highlights

  • Nano and microplastics in bottled water pose risks to human health and ecosystems.
  • NMPs can infiltrate the body, raising concerns over long-term health effects.
  • Exposure to NMPs may cause respiratory, reproductive, neurological, and cancer risks.
  • Lack of standardized testing hinders accurate assessment of health impacts.
  • Focused regulations to reduce single-use water bottles are essential.

Abstract

Single-use plastic products, such as water bottles, have become ubiquitous in modern society, contributing significantly to the growing problem of plastic waste in landfills, rivers, oceans, and natural habitats. This poses severe threats to biodiversity and ecosystem stability. The emergence of microplastics (1 µm to 5 mm) and nanoplastics (less than 1 µm) has raised alarms about their harmful effects on human health. Nanoplastics are especially hazardous due to their smaller size and enhanced ability to infiltrate the human body. There are critical gaps in the literature regarding the contamination of nano- and microplastics from single-use plastic water bottles, emphasizing the urgent need for further research. Here we review, we examine the global impact of nano- and microplastics from single-use plastic water bottles on human health, drawing insights from over 141 scientific articles. Key findings include the annual ingestion of 39,000–52,000 microplastic particles by individuals, with bottled water consumers ingesting up to 90,000 more particles than tap water consumers. The literature reveals variations in the number of nano- and microplastics particles, their sizes, and a lack of information on their physical properties. Moreover, the review highlights the chronic health issues linked to exposure to nano- and microplastics, including respiratory diseases, reproductive issues, neurotoxicity, and carcinogenicity. We highlight the challenges of standardized testing methods and the need for comprehensive regulations targeting nano- and microplastics in water bottles. This review article underscores the pressing need for expanding research, increasing public awareness, and implementing robust regulatory measures to address the adverse effects of nano- and microplastics from single-use plastic water bottles.

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