Popa Cristina L, Dontu Simona I, Savastru Dan, Carstea Elfrida M
National Institute of R&D for Optoelectronics, INOE2000, Atomistilor 409, 077125 Magurele, Romania.
Materials (Basel). 2025 Apr 1;18(7):1602. doi: 10.3390/ma18071602.
Water contamination with plastic materials represents one of the most pressing environmental problems that the modern world is facing. In this context, the present paper aims to investigate the influence of fluorescent dissolved organic matter (FDOM) released by plastic materials on the aquatic bacterial fraction and evaluate the efficiency of fluorescence spectroscopy in identifying plastic FDOM in freshwater. To this purpose, river and tap water samples were contaminated in a controlled manner in the laboratory, and the water quality parameters and bacterial occurrence for these samples were determined using standard physico-chemical characterization methods: fluorescence spectroscopy, dynamic light scattering, and flow cytometry. The results revealed that plastic debris influenced the dissolved-particulate organic matter continuum, also affecting bacterial cell proliferation in both the river and tap samples. The study highlights that the impact of plastic FDOM on bacterial proliferation should not be taken lightly, while fluorescence spectroscopy proved to be an effective method for identifying the presence of plastic FDOM in water samples of various origins.
塑料材料造成的水污染是现代世界面临的最紧迫的环境问题之一。在此背景下，本文旨在研究塑料材料释放的荧光溶解有机物（FDOM）对水生细菌群落的影响，并评估荧光光谱法在识别淡水中塑料FDOM的效率。为此，在实验室中以可控方式污染了河水和自来水样本，并使用标准物理化学表征方法（荧光光谱法、动态光散射法和流式细胞术）测定了这些样本的水质参数和细菌存在情况。结果表明，塑料碎片影响了溶解-颗粒有机物连续体，也影响了河水和自来水样本中的细菌细胞增殖。该研究强调，不应轻视塑料FDOM对细菌增殖的影响，而荧光光谱法被证明是识别各种来源水样中塑料FDOM存在的有效方法。
