基于沉降实验的微塑料静水沉降公式拟合  

Fitting of static water settlement formula of microplastics based on settlement experiment

作　　者：王振[1,2] 窦明[1,2] 任鹏举 王偲[3] 李桂秋[2] WANG Zhen;DOU Ming;REN Pengju;WANG Cai;LI Guiqiu(School of Water Conservancy Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China;Nantong Branch of the Hydrology and Water Resources Survey Bureau of Jiangsu Province,Nantong 226000,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450001 [2]郑州大学生态与环境学院,河南郑州450001 [3]江苏省水文水资源勘测局南通分局,江苏南通226000

出　　处：《武汉大学学报（工学版）》2021年第8期687-693,共7页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目(编号:51679218,51779230,51879239);河南省高校科技创新人才支持计划项目(编号:17HASTIT031)。

摘　　要：为了探究微塑料在水环境中的运移机制,采用对照实验方法,从微塑料的物理形状、粒径、密度及水体盐度4个方面研究了各因素对微塑料在静水条件下沉降速率的影响。选取了常用的泥沙颗粒沉降公式对微塑料的沉降规律进行拟合。结果表明,物理形状对其沉降影响较大,颗粒状微塑料的沉降速率要远大于其他形状的微塑料,且沉降速率会随着粒径与密度的增大而增大;在各类沉降公式中,沙玉清与武水公式能较好地拟合微塑料的沉降规律。In order to explore the migration mechanism of microplastics in water environment, the influence of various factors on the settling rate of microplastics under hydrostatic conditions is studied from physical shape,particle size, density of microplastics and water salinity by the contrast experiment method. At the same time,the commonly used formula of sediment particle settlement is also selected to simulate the settlement law of microplastics. The results show that physical shape has a great influence on the settlement, and the settlement rate of granular microplastics is much higher than that of other microplastics, and the settlement rate of microplastics will increase with the increase of particle size and density. In all kinds of settlement formulas, Sha Yuqing’and Wushui formulae can fit the settlement rules of microplastics better.

关 键 词：微塑料 静水沉降实验 沉降速率 沉降公式 

分 类 号：X52[环境科学与工程—环境工程]