微塑料对冰生消及密度的影响研究
Study on the effect of microplastics on ice formation,melting and density
王志超 1康延秋 1李卫平 1窦雅娇 1李嘉辰 1杨文焕1
作者信息
- 1. 内蒙古科技大学能源与环境学院;黄河流域内蒙古段生态保护与综合利用自治区协同创新中心
- 折叠
摘要
随着海洋及淡水中塑料垃圾数量的急剧增加,以乌梁素海为代表的寒区淡水湖泊中微塑料含量增长显著,冰封期结冰会促进微塑料富集于冰盖中,为深入理解微塑料在寒区冰冻区的环境迁移特点,利用自制结冰装置试验模拟湖水结冰期、融冰期,揭示微塑料对冰厚度增长率、消减率以及冰密度的影响.结果表明,微塑料的赋存促进冰生长,并且冰厚度增长值随微塑料丰度增加呈现出先增加后减小的趋势;且微塑料阻碍冰层融化,随着微塑料丰度的增加阻碍作用愈加明显.通过对不同条件下冰样密度进行观测发现,冰密度的变化是微塑料丰度和结冰温度为主导、微塑料粒径存在微弱影响的一种共同作用,微塑料丰度和结冰温度会对冰的生消过程和冰密度的变化造成影响.
Abstract
With the dramatic increase in the amount of plastic waste in marine and freshwater environment,the microplastic content in freshwater lakes in cold regions,represented by Lake Ulansuhai,has increased significantly.Ice formation during the freezing period will promote the enrichment of microplastics in the ice cover.In order to deeply understand the environmental migration characteristics of microplastics in cold and frozen regions,a self-made icing device was used to simulate the freezing and thawing periods of lake water,to reveal the influence of microplastics on the growth rate and melting rate of ice thickness,and ice density.The results showed that the existence of microplastics could promote ice growth,and the ice thickness growth value showed a trend of increasing first and then decreasing with the increase of microplastic abundance.Microplastics played an obstructive role in the melting of the ice,and with the increase of microplastic abundance,the obstructive role was more obvious.Observations of the density of ice samples under different conditions revealed that the change in ice density was dominated by the abundance of microplastics and the freezing temperature,while the particle size of microplastics had a slight impact,which was a combined effect.The microplastics abundance and icing temperature affected the process of ice formation and melting,as well as changes in the ice density.
关键词
微塑料/室内试验/增长率/消减率/密度Key words
microplastics/indoor experiments/growth rate/melting rate/density引用本文复制引用
基金项目
内蒙古自治区自然科学基金(2023MS05016)
出版年
2024
NETL
NSTL
万方数据