■微塑料(MP)污染现在是一个全球性的关键问题,并且已经成为对多种类型的栖息地相当担忧的主题,特别是在与海洋相连的沿海地区的泻湖中。议员们很担心,特别是因为地表水中的漂浮MP可以被许多海洋生物摄入。东南亚的海岸线上有几个泻湖,但宋卡泻湖是泰国唯一拥有丰富生物多样性的出口。迄今为止,在这个泻湖中,对MP的研究很少,因此,迫切需要更多地了解MP在泻湖水中的存在。
■我们调查宋卡泻湖地表水中的国会议员,泰国。在2022年12月的雨季和2023年2月的旱季,在泻湖的十个站点进行了采样。用过氧化氢消化样品以除去有机物质,随后使用饱和氯化钠进行密度分离。在立体显微镜下目测检查MPs以描述和确定形状,尺寸,和颜色。使用显微傅里叶变换红外(FTIR)光谱仪鉴定聚合物类型。此外,使用多参数探头测量了地表水的原位水质。进行了Mann-WhitneyU测试,以研究雨季和旱季之间MP水平和水质参数的变化。相关性分析(Spearmanrho)用于确定MP与水质之间相关性的显著性(p<0.05)。
■在所有十个采样点检测到MPs。最丰富的MPs是小型类(<500µm,主要由纤维组成)。在地表水中看到五种类型的聚合物,包括聚对苯二甲酸乙二醇酯,人造丝,聚丙烯,聚酯,和聚(乙烯:丙烯)。人造丝和聚酯是主要的聚合物。此外,议员在雨季和旱季最主要的颜色是黑色和蓝色,分别。雨季和旱季MPs的平均含量分别为0.43±0.18和0.34±0.08项目/L,分别。Mann-WhitneyU检验表明,干湿季节的水质存在显着差异(p<0.05)。相关分析(Spearmanrho)表明,在雨季,MPs与总溶解固体(TDS)值之间存在显着的负相关关系(r=-0.821,p=<0.05)。揭示了大量的MP可能分散在TDS浓度低的地表水体内。根据总体调查结果,泻湖地表水中的MP污染未发现受季节性环境的影响。河流流入泻湖,尤其是U-Taphao河,可能是导致泻湖中MP污染负荷增加的主要途径。这些结果可以作为基线数据,进行与来源相关的进一步研究工作,命运,分布,以及国会议员对其他沿海泻湖的影响。
UNASSIGNED: Microplastic (MP) pollution is now a global critical issue and has been the subject of considerable worry for multiple various types of habitats, notably in lagoons which are coastal areas connected to the ocean. MPs are of concern, particularly because floating MP in surface water can be ingested by a number of marine organisms. There are several lagoons along Southeast Asia\'s coastline, but Songkhla Lagoon is Thailand\'s only exit with a rich biodiversity. To date, there has been little research undertaken on MP in this lagoon, so there is a pressing need to learn more about the presence of MP in the lagoon\'s water.
UNASSIGNED: We investigate MPs in the surface water of Songkhla Lagoon, Thailand. Sampling took place at ten stations in the lagoon during the wet season in December 2022 and the dry season in February 2023. Samples were digested with hydrogen peroxide to remove organic matter followed by density separation using saturated sodium chloride. MPs were visually examined under a stereo microscope to describe and determine the shape, size, and color. Polymer type was identified using a micro Fourier transform infrared (FTIR) spectrometer. Moreover, the in-situ of water quality of the surface water was measured using a multi-parameter probe. A Mann-Whitney U test was performed to investigate the variations in MP levels and water quality parameters between the wet and dry seasons. Correlation analysis (Spearman rho) was used to determine the significance of correlations between MP and water quality (p < 0.05).
UNASSIGNED: MPs were detected at all ten of the sites sampled. The most abundant MPs were small size class (<500 µm, primarily consisting of fibers). Five types of polymers were seen in surface water, including polyethylene terephthalate, rayon, polypropylene, polyester, and poly (ethylene:propylene). Rayon and polyester were the dominant polymers. Additionally, the most dominant color of MPs in the wet and dry season was black and blue, respectively. The mean contents of MPs in the wet and dry season were 0.43 ± 0.18 and 0.34 ± 0.08 items/L, respectively. The Mann-Whitney U test suggested a significant difference between water quality in the wet and dry seasons (p < 0.05). Correlation analysis (Spearman rho) indicated a negative significant difference relationship between the MPs and the values of total dissolved solid (TDS) in the wet season (r = -0.821, p = <0.05), revealing that the large amounts of MPs may possibly be dispersed within surface water bodies with low TDS concentrations. Based on the overall findings, MP pollution in the surface water of the lagoon is not found to be influenced by the seasonal context. Rivers flowing into the lagoon, especially the U-Taphao River, may be a principal pathway contributing to increased MP pollution loading in the lagoon. The results can be used as baseline data to undertake further research work relevant to sources, fates, distribution, and impacts of MPs in other coastal lagoons.