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颗粒密度对在人造和天然多孔介质中的微塑料运输的影响

Wang Li¹, Giuseppe Brunetti², Anastasiia Bolshakova¹

¹University of Natural Resources and Life Sciences, Vienna, Department of Water, Atmosphere and Environment, Institute of Soil Physics and Rural Water Management, Muthgasse 18, 1190 Vienna, Austria.

The Science of the total environment

|May 23, 2024

概括

颗粒密度显著影响沉积物中的微塑料 (MP) 流动性. 漂浮和中立的MP为地下环境带来更高的风险,因为它们的移动性比沉没的MP更高.

科学领域:

环境科学环境科学
地质化学地质化学
材料科学是一种材料科学.

背景情况:

微塑料 (MP) 污染是一个日益严重的环境问题.
沉积物中的MP传输受大小,形状和溶液化学等因素的影响,但粒子密度的影响不太了解.

研究的目的:

为了研究微塑料颗粒密度对MP传输和和沉积物的保留的影响.
为了量化运输参数,使用一个具有深度依赖阻塞功能的两站动力运输模型.

主要方法:

在自然沉积物和玻璃珠中使用可变浮力MP (中性,沉降,浮力) 的柱体实验.
稳定的水同位素被用作水和MP运动的保守标记物.
运输参数量化使用两个位置的动力运输模型与深度依赖的阻断功能.

主要成果:

沉没的MP显示在石柱中保持率最高 (95.5±1.4%),表明密度会影响流动性.
沉积物类型没有显著影响玻璃珠柱中的MP沉积行为.
模型准确地描述了突破曲线,但高估了靠近柱入口的保留.

结论:

颗粒密度是MP移动性的关键因素,沉没的MP被更有效地保留.
中立和浮动的MP表现出更高的流动性,可能会对地下环境造成更大的污染风险.
需要进一步的模型开发,以准确地捕捉受粒子密度影响的MP沉积.

关键词:

密度密度是指密度.玻璃珠子玻璃珠子水瓶座1D是一个巨大的行星.微塑料是一种微塑料.沉积物沉积物是一种沉积物.交通运输交通运输交通运输交通运输

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