Experimental detection of marine plastic litter in surface waters by 405 nm LD-based fluorescence lidar.

Autor: Cadondon J; Environment And RemoTe sensing researcH (EARTH) Laboratory, Department of Physics, College of Science, De La Salle University Manila 0922, Philippines; Division of Physical Sciences and Mathematics, College of Arts and Sciences, University of the Philippines Visayas, Miagao 5023, Iloilo, Philippines. Electronic address: jgcadondon@up.edu.ph., Vallar E; Environment And RemoTe sensing researcH (EARTH) Laboratory, Department of Physics, College of Science, De La Salle University Manila 0922, Philippines., Shiina T; Graduate School of Science and Engineering, Chiba University, Chiba-Shi, Chiba 263-8522, Japan., Galvez MC; Environment And RemoTe sensing researcH (EARTH) Laboratory, Department of Physics, College of Science, De La Salle University Manila 0922, Philippines.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2024 Oct; Vol. 207, pp. 116842. Date of Electronic Publication: 2024 Aug 21.
DOI: 10.1016/j.marpolbul.2024.116842
Abstrakt: Plastic pollution has become a global challenge, affecting water quality and health. Plastics including polystyrene (PS), polyvinyl chloride (PVC), polypropylene (PP), polyethylene terephthalate (PET), and high-density polyethylene (HDPE), are significant contributors to environmental pollution. With the growing need for investigation and detection of plastics found in natural waters, we propose the use of a portable laser diode (LD)-based fluorescence lidar system for in-situ detection of plastic litters in surface waters based on excitation-emission fluorescence spectroscopic data. The experiments were carried out in a controlled environment using a fluorescence lidar system with 405 nm excitation wavelength to determine the fluorescence signals of several plastics at 470 nm emission wavelength. Simultaneous detection of PET plastic and Chlorella vulgaris were also observed to determine the fluorescence influence of chlorophyll in surface waters. Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy was employed to study the chemical composition of the plastics used before and after being submerged in the water. Scanning electron microscopy (SEM) and high-resolution camera microscopy were used to analyze the morphology of the submerged PET samples. This study provides a basis for a new in-situ technique using a fluorescence lidar system for submerged or transparent plastics in surface waters.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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