Indirect determination of environmental polylactic acid microplastic residues using a single-atom nickel composite electrode

文献类型： 外文期刊

第一作者： Pei, Yuexin

作者： Pei, Yuexin;Pei, Xinlong;Shang, Ruichao;Wang, Zehui;Li, Long;Zhu, Hong;Liang, Gang;Gong, Wenwen;Yue, Ying

作者机构：

关键词： Environmental monitoring; Mulch contamination; Polylactic acid microplastics; Single-atom Ni; Electrochemical detection

期刊名称：ANALYTICAL AND BIOANALYTICAL CHEMISTRY （ 影响因子：3.8； 五年影响因子：3.8 ）

ISSN： 1618-2642

年卷期： 2025 年

页码：

收录情况： SCI

摘要： The widely accepted application of polylactic acid (PLA) films as agricultural mulch films has led to the accumulation of microplastics (MPs) in soil ecosystems, causing severe white pollution. Developing a convenient method to detect PLA in the environment is essential for pollution control. In this study, single-atom nickel-doped nitrogen on carbon nanosheets (Ni-N-C) combined with gold-palladium nanoparticles (AuPdNPs) enabled highly sensitive lactic acid detection. Through oxidation catalyzed by the single-atom metal, the detection range for lactic acid was 50 mu molL(-)1 to 50 mmolL(-)1, with a detection limit of 10 mu molL(-)1. This approach indirectly quantified PLA in MPs via lactic acid detection on Ni-N-C + AuPdNPs. This is the first electrochemical method to indirectly determine depolymerized polylactic acid for environmental PLA quantification. The detection current showed minimal fluctuation over 7 days and remained unaffected by common soil interferents. It demonstrates strong applicability in real environments by indirectly assessing MP residues through their depolymerization products, avoiding complex separation processes. High PLA recovery rates in water and soil highlight its potential for environmental monitoring. A stable electrochemical detection of microplastic monomers was provided for such detection approaches.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序