We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Development of Sampling and Analytical Methods for Measuring Microplastics with Sizes Greater than 20 μm in Tap Water
Summary
Researchers (in Japan) developed an improved sampling and analysis method for measuring microplastics larger than 20 micrometers in tap water, achieving 91% recovery efficiency. The method detected microplastics from 12 different polymer types in groundwater-sourced tap water, demonstrating that even treated drinking water contains microplastic contamination.
水道水中の20 μm以上のマイクロプラスチック (MPs) の汚染状況を高精度に把握する採取分析方法を開発した。比重分離法と顕微フーリエ変換赤外分光光度計を用いた機器分析により, 水道水中から91.0%のMPsを回収できた。水道水試料量の増加に伴い, MPs濃度の標準偏差は減少し, 1000 Lで変動係数は14.9%まで低下した。未使用のプランクトンネットろ過による屋外蛇口直下でのMPs採取では, 大気降下由来の汚染量は16.7 ± 6.4個だったが, 蓋の使用により低下した。最後に, 地下水を取水源とする水道水1000 Lを分析した結果, 12種のポリマーが検出され, 合計濃度は78 ± 10.4～2130 ± 358個 m-3であった。主要ポリマーはポリエチレン, アルキド樹脂およびポリメタクリル酸メチルで全体の56.5～94.0%を占めた。粒径分布のミディアン径は30.1～60.4 μmであり, 形状は破片状が多かった。
Sign in to start a discussion.
More Papers Like This
Microplastic and nanoplastic concentration in tap water in the US
Researchers analyzed microplastic and nanoplastic concentrations in tap water samples across the United States, detecting particles in the majority of samples and characterizing their size distribution, polymer type, and geographic variation.
Identifying microplastic contamination in drinking water: analysis and evaluation using spectroscopic methods
Researchers developed analytical methods to identify and quantify microplastic contamination in drinking water, evaluating extraction efficiency and detection accuracy across different water types and plastic particle sizes. The study assessed health implications based on measured plastic loads in treated water.
Global prevalence of microplastics in tap water systems: Abundance, characteristics, drivers and knowledge gaps
A global analysis of tap water from 34 countries found that microplastics were present in 87% of over 1,100 samples tested, with particles smaller than 50 micrometers being the most common. When researchers looked for particles as small as 1 micrometer, concentrations were more than 20 times higher than studies that only counted larger particles. This means that most people worldwide are regularly drinking microplastics in their tap water, and the true extent of exposure has likely been underestimated.
Occurrence and identification of microplastics in tap water from China
Researchers analyzed 38 tap water samples from cities across China and found microplastics in all of them, with concentrations averaging around 440 particles per liter. Most particles were smaller than 50 micrometers, and the dominant types were polyethylene and polypropylene fragments. The findings highlight that drinking water treatment plants face a significant challenge in addressing microplastic contamination in the water supply.
Microplastic Contamination in Drinking Water: A Review
This review summarized current research on microplastic contamination in drinking water, covering detection methods, occurrence data, and health implications. The authors found microplastics widely present in tap and bottled water worldwide and noted that conventional treatment processes remove them incompletely, raising ongoing concerns about chronic low-level human ingestion.