Ph.D. Program in Maritime Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Faculty of Environment and Natural Resources, Nong Lam University of Ho Chi Minh City, Hamlet 6, Linh Trung Ward, Thu Duc Dist., Ho Chi Minh City 700000, Viet Nam.
Ph.D. Program in Maritime Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan.
Environ Res. 2023 Mar 1;220:115190. doi: 10.1016/j.envres.2022.115190. Epub 2022 Dec 29.
This study aims to investigate the distribution and ecological risk assessment of microplastics (MPs) in peatland areas located in Long An province, Vietnam's Mekong Delta. In general, polyvinyl chloride (60.7%), polyethylene (25.8%), and polypropylene (11.9%) were the most abundant polymers determined in the thirty sediment samples. The hazard index (HI) remarked a level of III for MPs contamination in Tan Thanh and Thanh Hoa districts. The pollution load index (PLI) and potential ecological risk index (RI) indicated that the contamination risk of MPs polymer types in the studied sites is relatively high. According to PLI values, MPs levels of peatlands in Tan Thanh and Thanh Hoa are high and moderate, respectively, while the peatland sediments in Duc Hue district are less contaminated. Furthermore, ecological risk indexes in the peatland areas were relatively high, with PLI (level III); HI (level V), and RI (extreme danger). Hence, this study proposed a SWOT framework for challenges of MPs pollution in order to manage peatlands appropriately and minimize ecological risks. As a result, several practical strategies and appropriate approaches have been recommended to reduce microplastics towards a circular economy. These findings provide the initial quantitative assessment insights into hazard levels and ecological impacts of MPs in Vietnam's Mekong Delta peatlands.
本研究旨在调查位于越南湄公河三角洲龙安省的泥炭地中微塑料（MPs）的分布和生态风险评估。总体而言，在三十个沉积物样本中，聚氯乙烯（60.7%）、聚乙烯（25.8%）和聚丙烯（11.9%）是最丰富的聚合物。在 Tan Thanh 和 Thanh Hoa 区，危害指数（HI）表明 MPs 污染处于 III 级水平。污染负荷指数（PLI）和潜在生态风险指数（RI）表明，研究地点 MPs 聚合物类型的污染风险相对较高。根据 PLI 值，Tan Thanh 和 Thanh Hoa 的泥炭地 MPs 水平分别为高和中，而 Duc Hue 区的泥炭地沉积物污染程度较低。此外，泥炭地地区的生态风险指数较高，其中 PLI（III 级）；HI（V 级）和 RI（极度危险）。因此，本研究提出了一个 SWOT 框架，以应对 MPs 污染的挑战，从而对泥炭地进行适当管理并最大程度地降低生态风险。结果，提出了一些实用的策略和适当的方法来减少微塑料，以实现循环经济。这些发现为评估越南湄公河三角洲泥炭地中 MPs 的危害水平和生态影响提供了初步的定量评估。
