微型多孔材料
膜
化学
环境化学
聚苯乙烯
超滤(肾)
过滤(数学)
质谱法
集聚经济
气相色谱-质谱法
色谱法
环境科学
化学工程
有机化学
聚合物
生物化学
工程类
数学
统计
作者
Qingcun Li,Yujian Lai,Peng Li,Xing Liu,Ziwei Yao,Jingfu Liu,Sujuan Yu
标识
DOI:10.1021/acs.est.2c02033
摘要
Although nanoplastics (NPs) are recognized as emerging anthropogenic particulate pollutants, the occurrence of NPs in the environment is rarely reported, partly due to the lack of sensitive methods for the concentration and detection of NPs. Herein, we present an efficient method for enriching NPs of different compositions and various sizes. Alkylated ferroferric oxide (Fe3O4) particles were prepared as adsorbents for highly efficient capture of NPs in environmental waters, and the formed large Fe3O4–NP agglomerates were separated by membrane filtration. Detection limits of 0.02–0.03 μg/L were obtained for polystyrene (PS) and poly(methyl methacrylate) (PMMA) NPs by detection with pyrolysis–gas chromatography–mass spectrometry (Py-GC/MS). When analyzing real water samples from different sources, it is remarkable that PS NPs were detected in 11 out of 15 samples with concentrations ranging from <0.07 to 0.73 μg/L, while PMMA were not detected. The wide detection of PS NPs in our study confirms the previous speculation that NPs may be ubiquitous in the environmental waters. The accurate quantification of PS NPs in environmental waters make it possible to monitor the pollution status of NPs in aquatic systems and evaluate their potential risks.
科研通智能强力驱动
Strongly Powered by AbleSci AI