Characterization of microplastics in soil, leachate and groundwater at a municipal landfill in Rayong Province, Thailand

IF 3.5 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Wanlapa Wisitthammasri , Phatchareeporn Promduang , Srilert Chotpantarat
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Abstract

Recent years have witnessed a dramatic increase in global plastic production, leading to heightened concerns over microplastics (MPs) contamination as a significant environmental challenge. MP particles are ubiquitously distributed across both continental and marine ecosystems. Given the paucity of research on MPs in Thailand, particularly regarding MPs contamination in terrestrial environments, this study focused on investigating the distribution and characteristics of MPs in a landfill area. We collected 15 soil samples, 2 leachate samples, and 7 groundwater samples from both inside and outside a municipal landfill situated in the urbanized coastal region of Rayong Province. Our findings revealed variability in MPs concentration across different sample types. In soil, the MP count ranged from 240 to 26,100 pieces per kg of dry soil, 58.71 % of all sample sizes are lower than 0.5 mm. Similarly, the size found in the leachate sample, and the average MP in the leachate samples was 139 pieces per liter of MPs. The groundwater samples showed a fluctuation in MPs count from 18 to 94 pieces per liter, and the size of MPs ranged mostly from 0.5 to 1 mm. The predominant forms of MPs identified were sheets, followed by fragments, fibers, and granules. According to μ-FTIR analysis, the majority of the MPs were composed of polyethylene and polypropylene, commonly used in plastic packaging and ropes. The observed high concentrations and extensive distribution of MP contamination underscore the urgency for further studies and effective management strategies to mitigate the adverse impacts of this pollution on various organisms and ecosystems.
泰国罗勇府一个城市垃圾填埋场的土壤、沥滤液和地下水中微塑料的特征。
近年来,全球塑料产量急剧增加,导致人们更加关注微塑料(MPs)污染这一重大环境挑战。微塑料颗粒在大陆和海洋生态系统中无处不在。鉴于泰国有关 MPs 的研究很少,特别是有关陆地环境中 MPs 污染的研究,本研究重点调查了垃圾填埋场中 MPs 的分布和特征。我们从罗勇府城市化沿海地区的一个市政垃圾填埋场内外采集了 15 份土壤样本、2 份沥滤液样本和 7 份地下水样本。我们的研究结果表明,不同类型的样本中 MPs 的浓度存在差异。在土壤中,每公斤干土中的 MP 数量从 240 到 26,100 不等,58.71% 的样本尺寸小于 0.5 毫米。同样,在沥滤液样本中也发现了这种尺寸,沥滤液样本中的 MP 平均值为每升 139 粒。地下水样本中的 MPs 数量从每升 18 个到 94 个不等,MPs 的大小大多在 0.5 毫米到 1 毫米之间。经鉴定,主要的 MPs 形态是片状,其次是碎片、纤维和颗粒。根据μ-傅立叶变换红外分析,大多数 MPs 由聚乙烯和聚丙烯组成,常用于塑料包装和绳索。观察到的 MP 污染物浓度高、分布广,突出表明迫切需要进一步研究和制定有效的管理策略,以减轻这种污染对各种生物和生态系统的不利影响。
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来源期刊
Journal of contaminant hydrology
Journal of contaminant hydrology 环境科学-地球科学综合
CiteScore
6.80
自引率
2.80%
发文量
129
审稿时长
68 days
期刊介绍: The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide). The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.
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