Distribution of microplastics in surface water of tropical urban lakes: A case study in Ha Noi, Vietnam

IF 2.4 Q2 GEOSCIENCES, MULTIDISCIPLINARY VIETNAM JOURNAL OF EARTH SCIENCES Pub Date : 2023-08-01 DOI:10.15625/2615-9783/18595
H. Mai, Van Hoi Bui, Thanh Duong Dao, Thanh Duong Nguyen, Danh Thien Nguyen, Toan Khanh Vu, Nguyen Hoang Anh Chu, Manh Quan Tran, Emillie Stragy
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引用次数: 1

Abstract

Microplastics are nowadays considered ubiquitous pollutants since they have been found widespread in all environmental compartments, particularly in aquatic systems. In urban water bodies, municipal wastewater discharges and overflows of combined storm and wastewater drains are the sources of microplastic pollution. The investigation was performed on the distribution of microplastics in the surface water of three urban lakes: West Lake, Yen So Lake, and Bay Mau Lake, from February 2020 to January 2021. Results show that microplastics were widely and unevenly distributed in all three lakes in Ha Noi and reached a high abundance on the site of West Lake, which is most intensively surrounded by population density, restaurants/bars, and aquaculture activities. Microplastic abundance was highest in February 2020 for all three urban lakes, with 154.92 items m-3 in Bay Mau, 589.46 items m-3 in West Lake, and 139.86 items m-3 in Yen So Lake. There was a decreasing trend in the following sampling times of July, October 2020, and January 2021 (range: Bay Mau: 16.02-59.04 items m-3; West Lake: 36.51-201.08 items m-3; Yen So: 14.07-67.27 items m-3). The dominant microplastics in urban lakes were fibers with a size of 1-3 mm, while microplastic fragments were 0.045-0.3 mm2. Analysis of the chemical composition of microplastics indicated dominance by rayon (13.5-58.5%) and polyethylene terephthalate (14.1-30.8%). This study is an essential reference for understanding the characteristics of the variation in microplastics in urban lakes to reduce local microplastic pollution effectively.
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热带城市湖泊地表水中微塑料的分布:以越南河内为例
微塑料如今被认为是普遍存在的污染物,因为它们广泛存在于所有环境分区中,尤其是在水生系统中。在城市水体中,城市污水排放和雨污合流制的溢流是微塑料污染的来源。2020年2月至2021年1月,对西湖、严素湖和茂湾三个城市湖泊地表水中微塑料的分布进行了调查。结果表明,微塑料在河内所有三个湖泊中广泛而不均匀地分布,在人口密度、餐馆/酒吧和水产养殖活动最密集的西湖区域,微塑料的丰度很高。2020年2月,三个城市湖泊的微塑料丰度最高,毛湾有154.92个m-3项目,西湖有589.46个m-3,延梭湖有139.86个m-3项目。2020年7月、10月和2021年1月的以下采样时间呈下降趋势(范围:毛湾:16.02-59.04个m-3项目;西湖:36.51-201.08个m-3;Yen So:14.07-67.27个m-3)。城市湖泊中占主导地位的微塑料是1-3毫米大小的纤维,而微塑料碎片为0.045-0.3平方毫米。对微塑料化学成分的分析表明,人造丝(13.5-58.5%)和聚对苯二甲酸乙二醇酯(14.1-30.8%)占主导地位。本研究为了解城市湖泊中微塑料的变化特征,有效减少当地微塑料污染提供了重要参考。
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来源期刊
VIETNAM JOURNAL OF EARTH SCIENCES
VIETNAM JOURNAL OF EARTH SCIENCES GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.60
自引率
20.00%
发文量
0
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