Analysis of microplastics in the fjords of Tunu (East Greenland)

IF 5.3 3区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Marine pollution bulletin Pub Date : 2025-05-24 DOI:10.1016/j.marpolbul.2025.118192

C.B. Vetter , L. Hildebrandt , T. Zimmermann , C.E. Schmidt , F. El Gareb , D.M. Mitrano , D. Pröfrock , H. Thomas

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Abstract

Microplastics (MPs) were surveyed in the fjords of Tunu (East Greenland), contributing important information to the scarce database on plastics in the Arctic. A total of 18 subsurface water samples were collected at eight stations along the northeast coast of Kalaallit Nunaat (Greenland) in August 2022. Sampling of the MPs was optimized and validated using traceable metal-doped model MPs. Recovery rates of the metal-doped MPs for validation of the sampling process using the Geesthacht Inert MP Fractionator were 78.7 ± 0.7 % (1 SD, n = 3) for a mixture of biofilm-coated Polyethylene terephthalate (PET) and Polylactic acid (PLA) particles. Samples were analyzed using laser direct infrared (LDIR) imaging. The reported MP number concentrations ranged from 1.0 ± 0.8 L⁻¹ (1 SD, n = 3) to 12 ± 4 L⁻¹ (n = 4) in the size range of 20–500 μm. The highest concentrations were observed at the mouth of the Kangertittivaq (Scoresby Sound), in the vicinity of the settlement Ittoqqortoormiit. PET was identified as the predominant polymer type, representing an average share of 96 %. PLA featured the second highest abundance, accounting for an average 1.6 % share. The analysis of conductivity-temperature-depth profiles revealed no significant evidence of MP input from glacial runoff. The results demonstrate the critical importance of collecting replicate samples, as short-term fluctuations in MP concentration and composition exceeded potential differences in their spatial distribution.

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图努峡湾（东格陵兰）微塑料分析

在图努（东格陵兰岛）峡湾调查了微塑料（MPs），为北极稀缺的塑料数据库提供了重要信息。2022年8月，在Kalaallit Nunaat（格陵兰）东北海岸的8个站点共采集了18个地下水样本。使用可追溯的金属掺杂模型MPs对MPs的采样进行了优化和验证。对于生物膜包覆的聚对苯二甲酸乙二醇酯（PET）和聚乳酸（PLA）颗粒的混合物，使用Geesthacht惰性MP分馏塔对金属掺杂MPs进行取样过程验证的回收率为78.7±0.7% （1 SD, n = 3）。采用激光直接红外（LDIR）成像对样品进行分析。在20 ~ 500 μm范围内，MP数浓度范围为1.0±0.8 L−1 (1 SD, n = 3) ~ 12±4 L−1 （n = 4）。在Ittoqqortoormiit定居点附近的Kangertittivaq （Scoresby Sound）河口观察到的浓度最高。PET被确定为主要的聚合物类型，平均占96%。PLA的丰度第二高，平均占1.6%。电导率-温度-深度剖面分析显示，冰川径流没有显著的MP输入证据。结果表明，收集重复样品至关重要，因为MP浓度和组成的短期波动超过了它们空间分布的潜在差异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine pollution bulletin 环境科学-海洋与淡水生物学

CiteScore

10.20

自引率

15.50%

发文量

1077

审稿时长

68 days

期刊介绍： Marine Pollution Bulletin is concerned with the rational use of maritime and marine resources in estuaries, the seas and oceans, as well as with documenting marine pollution and introducing new forms of measurement and analysis. A wide range of topics are discussed as news, comment, reviews and research reports, not only on effluent disposal and pollution control, but also on the management, economic aspects and protection of the marine environment in general.