相关实验视频

Updated: Jun 20, 2025

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

微塑料在不同的自然降雨和短期肥料应用下在农业表面下水的发生和排放特征

Dengping Liu¹, Zhimin Yang¹, Yang Gong¹

¹College of Resources and Environment, Southwest University, Chongqing 400715, China; Chongqing Engineering Research Center of Rural Cleaning, Chongqing 400715, China.

Journal of hazardous materials

|July 22, 2024

概括

农业排水将微塑料 (MP) 从陆地运送到水中. 像聚乙烯这样的小小,低密度的MP具有很高的流动性,降雨强度显著影响了下水中的MP丰度.

科学领域:

环境科学环境科学
土壤科学土壤科学
水的质量水的质量

背景情况:

陆地微塑料 (MP) 是水生MP的主要来源.
农业排水是MP从土壤转移到地表水中的重要途径.
在农业下游的MP运输特征并未得到充分理解.

研究的目的:

调查农业表面下水的MPs的发生和排放特征.
确定施加肥料和降雨对MP运输的影响.
量化农业地区的MP排放负载.

主要方法:

使用激光直接红外成像分析 (LDIR) 来分析MPs.
收集了各种短期肥料应用和自然降雨事件下的下水样本.
检查了MP的丰度,度,大小,密度和聚合物类型.

主要成果:

来自肥料和土壤的MP与农业下水一起迁移.
流出MP的丰度在145.90 ± 22.48到2043.38 ± 89.51项之间;L-1.1.
小型,低密度的MP (PE,CPE,PU) 在薄膜/片段形式 (20-50μm) 显示出更高的移动性.
不同的肥料应用中没有发现MP分布的显著差异.
流出MP的丰度与降雨强度正相关.
年度排放负载估计为116.73g·hm-2.2.

结论:

农业表面下水是微塑料运输的关键途径.
小和低密度的国会议员在下一轮选举中更具流动性.
降雨强度是微塑料排放的一个关键驱动因素.
年度排放量突显了农业排放在PM污染中的重要性.

关键词:

农业土壤农业土壤排放负载的排放负载是什么微塑料是一种微塑料.排水过程中的排水.运输的特点运输的特点

更多相关视频

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

Published on: July 27, 2022

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy

Quantification of Polybutylene Adipate Terephthalate-based Micro- and Nano-plastics from Soil Using Proton Nuclear Magnetic Resonance Spectroscopy

Published on: June 6, 2025

相关概念视频

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.