不同土地利用模式下的土壤微塑料的垂直分布和特征:中国光市的案例研究
Jizhi Li1, Bin Zhu1, Bin Huang2
1Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100039, China.
The Science of the total environment
|August 12, 2023
概括
土壤微塑料污染很普遍,在农业设施的表层土壤中发现的度更高. 微塑料的丰富性随着土壤深度的下降而减少,受环境因素的影响.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 污染研究 污染研究
背景情况:
- 微塑料污染是一个全球性的环境问题.
- 了解微塑料在土壤中的垂直分布对于评估污染水平和生态影响至关重要.
- 关于微塑料在各种土地使用类型的分布的数据有限.
研究的目的:
- 调查土壤中微塑料的丰富性,特性和垂直分布,涉及7种土地使用类型.
- 确定不同土壤层和土地用途中普遍存在的微塑料类型 (大小,形状,颜色,聚合物).
- 探索土壤环境因素与微塑料污染之间的关系.
主要方法:
- 系统地从森林,草原,玉米,小麦,棉花,多道和温室用地的0-60厘米深度取土壤样本.
- 分析微塑料的丰富度,颗粒大小,形状,颜色和聚合物类型,使用既定的方法.
- 微塑料特性与土壤特性 (pH,EC,总,总,有机碳) 之间的相关性分析.
主要成果:
- 随着土壤深度的增加,微塑料的丰富程度显著下降,平均分别在顶层,中层和深层土壤中分别为1948.1,1349.4和670.1个物品/公斤.
- 与其他土地用途相比,设施土壤 (多道,温室) 在表层土壤中显示出显著更高的微塑料丰度.
- 小型 (<0.5毫米) 微塑料,主要是聚乙烯 (PE) 和聚烯 (PP) 的薄膜和碎片,主导着农业土壤;颗粒形式随着深度的增加而增加.
- 土壤环境因素显著影响了微塑料的分布,碎片化和运输.
结论:
- 土壤微塑料污染表现出明显的垂直分布模式,受土地使用类型和土壤特性的影响.
- 农业实践,特别是在设施环境中,对表面微塑料积累有很大的贡献.
- 研究结果为制定有效策略,管理和减轻土壤微塑料污染提供了关键数据.
更多相关视频
相关概念视频
Environmental Applications of Microorganisms
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
Soil Microbial Ecology
Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
Microbial Bioremediation of Uranium
Microorganisms play a critical role in the transformation and immobilization of uranium in contaminated environments through four main pathways: bioreduction, biosorption, bioaccumulation, and biomineralization. These mechanisms reduce uranium’s toxicity and prevent its migration through groundwater systems, offering sustainable approaches for in situ bioremediation.Bioreduction of UraniumBioreduction is driven by anaerobic bacteria such as certain strains of Geobacter and Shewanella, which use...
Microbial Bioremediation of Plastics
Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...


