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<p>Ubiquitous pollution due to microplastics through the food chain is a major cause of various deleterious effects on human and animal health. This study aimed to investigate the existence and characterization of microplastics in earthworms (<i>Lampito mauritii</i>) collected from the Kaveri River, Mettur Dam, Southern India. The MPs were extracted from 40 earthworms by 10% of potassium hydroxide digestion medium. The extracted MPs were characterized using an optical microscope, Attenuated total reflectance-Fourier-transform infrared (ATR-FT-IR) spectroscopy, and field emission scanning electron microscopy-energy dispersive X-ray analysis (FESEM-EDX). Totally, 435 MPs are particles in the gut of the 40 earthworms, and four forms of MPs are fragments, films, threads, and pellets along with the smallest (0.1&#xa0;mm) and greatest (1&#xa0;mm) of MPs. ATR-FT-IR spectrum indicated three prominent polymer compounds, namely cellophane (CP), polyamide (PA), and polyarylether (PAE). The FESEM images observed that the majority of the microfibers had smooth surfaces and linear forms along with attachment of heavy metals. Our results highlight the preliminary insights into the presence of MPs in earthworm gut.</p> Graphical Abstract <p></p>

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Microplastics Occurrence in Earthworm (Lampito mauritii) from the Mettur Dam, Southern India and Contamination Indices: Investigation and Indication

  • 期刊论文

  • 发表日期：

    2025年10月2日

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  • Arunagiri Ragu Prasath,
  • Kandasamy Selvam,
  • Krishna Kumar Yadav,
  • Mosab Kaseem,
  • Chinnappan Sudhakar,
  • Ahmad J. Obaidullah

摘要

Ubiquitous pollution due to microplastics through the food chain is a major cause of various deleterious effects on human and animal health. This study aimed to investigate the existence and characterization of microplastics in earthworms (Lampito mauritii) collected from the Kaveri River, Mettur Dam, Southern India. The MPs were extracted from 40 earthworms by 10% of potassium hydroxide digestion medium. The extracted MPs were characterized using an optical microscope, Attenuated total reflectance-Fourier-transform infrared (ATR-FT-IR) spectroscopy, and field emission scanning electron microscopy-energy dispersive X-ray analysis (FESEM-EDX). Totally, 435 MPs are particles in the gut of the 40 earthworms, and four forms of MPs are fragments, films, threads, and pellets along with the smallest (0.1 mm) and greatest (1 mm) of MPs. ATR-FT-IR spectrum indicated three prominent polymer compounds, namely cellophane (CP), polyamide (PA), and polyarylether (PAE). The FESEM images observed that the majority of the microfibers had smooth surfaces and linear forms along with attachment of heavy metals. Our results highlight the preliminary insights into the presence of MPs in earthworm gut.

Graphical Abstract