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Comparison of Microplastic Pollution in Beach Sediment and Seawater at UNESCO Can Gio Mangrove Biosphere Reserve
Global Challenges ( IF 4.4 ) Pub Date : 2021-07-16 , DOI: 10.1002/gch2.202100044 Vo Thi Kim Khuyen 1 , Dinh Vu Le 2 , Axel René Fischer 1 , Christina Dornack 1
Global Challenges ( IF 4.4 ) Pub Date : 2021-07-16 , DOI: 10.1002/gch2.202100044 Vo Thi Kim Khuyen 1 , Dinh Vu Le 2 , Axel René Fischer 1 , Christina Dornack 1
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Microplastics have become a global concern due to their persistent properties and impacts on the marine environment. This research investigates pollution sources and behaviors of microplastics at UNESCO Can Gio Mangrove Biosphere Reserve. Density flotation with sodium chloride is employed to extract microplastics from sand at Can Gio Beach, and a double-filtration procedure is developed to recover microplastics from seawater at the beach and Dong Tranh Cape. The microplastics’ morphology and type are analyzed by micro-Raman spectroscopy. The results show that microplastics are accumulated at concentrations from 31.99 to 92.56 MPs g−1 at various sand layers. The seawater at Can Gio Beach and Dong Tranh Cape contains 6.44 and 3.75 MPs L−1 of microplastics, respectively. White polyethylene fragments predominate, and all the microplastics comprise small secondary microplastics with a minimum size of 25 µm and a maximum size of 260 µm for fragments and a length of 640 µm for fibers. The proportions of polyethylene, polypropylene, polystyrene, and polymethylmethacrylate are similar. The differing percentages of other compositions in sand and seawater are attributed to the morphology and density of the microplastics. The results indicate the extent of microplastic pollution and suggest appropriate strategies for tourism development at the Biosphere Reserve.
中文翻译：
联合国教科文组织 Can Gio 红树林生物圈保护区海滩沉积物和海水中微塑料污染的比较
由于其持久特性和对海洋环境的影响，微塑料已成为全球关注的问题。这项研究调查了联合国教科文组织 Can Gio 红树林生物圈保护区的微塑料污染源和行为。采用氯化钠密度浮选法从 Can Gio 海滩的沙子中提取微塑料，并开发了双重过滤程序从海滩和 Dong Tranh Cape 的海水中回收微塑料。通过显微拉曼光谱分析微塑料的形态和类型。结果表明，不同沙层的微塑料累积浓度为31.99至92.56 MPs g -1 。Can Gio海滩和Dong Tranh海角的海水分别含有6.44和3.75 MPs L -1的微塑料。白色聚乙烯碎片占主导地位，所有微塑料均包含小型次生微塑料，碎片的最小尺寸为 25 µm，最大尺寸为 260 µm，纤维长度为 640 µm。聚乙烯、聚丙烯、聚苯乙烯、聚甲基丙烯酸甲酯的比例相似。沙子和海水中其他成分的不同百分比归因于微塑料的形态和密度。结果表明了微塑料污染的程度，并为生物圈保护区的旅游业发展提出了适当的策略。
更新日期：2021-07-16
中文翻译：
联合国教科文组织 Can Gio 红树林生物圈保护区海滩沉积物和海水中微塑料污染的比较
由于其持久特性和对海洋环境的影响，微塑料已成为全球关注的问题。这项研究调查了联合国教科文组织 Can Gio 红树林生物圈保护区的微塑料污染源和行为。采用氯化钠密度浮选法从 Can Gio 海滩的沙子中提取微塑料，并开发了双重过滤程序从海滩和 Dong Tranh Cape 的海水中回收微塑料。通过显微拉曼光谱分析微塑料的形态和类型。结果表明，不同沙层的微塑料累积浓度为31.99至92.56 MPs g -1 。Can Gio海滩和Dong Tranh海角的海水分别含有6.44和3.75 MPs L -1的微塑料。白色聚乙烯碎片占主导地位，所有微塑料均包含小型次生微塑料，碎片的最小尺寸为 25 µm，最大尺寸为 260 µm，纤维长度为 640 µm。聚乙烯、聚丙烯、聚苯乙烯、聚甲基丙烯酸甲酯的比例相似。沙子和海水中其他成分的不同百分比归因于微塑料的形态和密度。结果表明了微塑料污染的程度，并为生物圈保护区的旅游业发展提出了适当的策略。
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