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<p>Environmental contamination by heavy metals in water and Particulate Matter (PM) in air poses severe risk to the ecosystems and human health. Presence of toxic heavy metals such as Arsenic (As), Lead (Pb) and Mercury (Hg) in drinking water are strongly correlated with cancer, neurological damage, and developmental disorders, while airborne particulate matter especially, PM₂.₅ and PM₁₀ significantly contribute to the respiratory and cardiovascular diseases. Laser-Induced Fluorescence (LIF) offers a sensitive, portable, and rapid choice for pollutant monitoring, making it highly suitable for environmental quality assessment. In this study, Laser-Induced Fluorescence (LIF)-based sensing responses for arsenic, lead and mercury were evaluated primarily using controlled laboratory-prepared aqueous standards, demonstrating trace-level sensitivity relevant to World Health Organization (WHO) guideline limits under proof-of-concept conditions. While analyte-specific approaches for selected heavy metals have been reported previously, the present work extends these concepts into a broader environmental monitoring framework by integrating aqueous contaminant sensing with atmospheric particulate matter characterization using a common Laser-Induced Fluorescence platform. Also, in air quality monitoring, LIF has been employed for rapid characterization of particulate matter (PM ₂.₅ and PM₁₀). By detecting intrinsic fluorescence of organic compounds, LIF provides chemical fingerprints that support source identification along with real-time pollution assessment. Overall, this study highlights the capability of Laser-Induced Fluorescence spectroscopy to serve as a versatile and cost-effective sensing framework for monitoring environmental contaminants across both aqueous and atmospheric systems through a shared optical excitation-emission methodology.</p>

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Laser-induced fluorescence spectroscopy based sensors for environmental monitoring: applications in water and air quality assessment

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Pragya Parmita Konwar,
  • Seikh Mustafa Radiul,
  • Manoj Saikia,
  • Gautom Bhuyan,
  • Simanta Hazarika

摘要

Environmental contamination by heavy metals in water and Particulate Matter (PM) in air poses severe risk to the ecosystems and human health. Presence of toxic heavy metals such as Arsenic (As), Lead (Pb) and Mercury (Hg) in drinking water are strongly correlated with cancer, neurological damage, and developmental disorders, while airborne particulate matter especially, PM₂.₅ and PM₁₀ significantly contribute to the respiratory and cardiovascular diseases. Laser-Induced Fluorescence (LIF) offers a sensitive, portable, and rapid choice for pollutant monitoring, making it highly suitable for environmental quality assessment. In this study, Laser-Induced Fluorescence (LIF)-based sensing responses for arsenic, lead and mercury were evaluated primarily using controlled laboratory-prepared aqueous standards, demonstrating trace-level sensitivity relevant to World Health Organization (WHO) guideline limits under proof-of-concept conditions. While analyte-specific approaches for selected heavy metals have been reported previously, the present work extends these concepts into a broader environmental monitoring framework by integrating aqueous contaminant sensing with atmospheric particulate matter characterization using a common Laser-Induced Fluorescence platform. Also, in air quality monitoring, LIF has been employed for rapid characterization of particulate matter (PM ₂.₅ and PM₁₀). By detecting intrinsic fluorescence of organic compounds, LIF provides chemical fingerprints that support source identification along with real-time pollution assessment. Overall, this study highlights the capability of Laser-Induced Fluorescence spectroscopy to serve as a versatile and cost-effective sensing framework for monitoring environmental contaminants across both aqueous and atmospheric systems through a shared optical excitation-emission methodology.