Physical processes behind interactions of microplastic particles with natural ice

海冰 海冰生长过程 北极冰盖 卤水 透明冰 薄饼冰 水柱 铅(地质) 极地的 地质学 环境科学 海洋学
作者
Irina Chubarenko
出处
期刊:Environmental research communications [IOP Publishing]
标识
DOI:10.1088/2515-7620/ac49a8
摘要

Abstract Microplastic particles (MPs, <5 mm) are found in marine ice in larger quantities than in seawater, however, the distribution pattern within the ice cores is not consistent. To get insights into the most general physical processes behind interactions of ice and plastic particles in cool natural environments, information from academic and applied research is integrated and verified against available field observations. Non-polar molecules of common-market plastics are hydrophobic, so MPs are weak ice nucleators, are repelled from water and ice, and concentrate within air bubbles and brine channels. A large difference in thermal properties of ice and plastics favours concentration of MPs at the ice surface during freeze/thaw cycles. Under low environmental temperatures, falling in polar regions below the glass / brittle-ductile transition temperatures of the common-use plastics, they become brittle. This might partially explain the absence of floating macroplastics in polar waters. Freshwater freezes at the temperature well below that of its maximum density, so the water column is stably stratified, and MPs eventually concentrate at the ice surface and in air bubbles. In contrast, below growing sea ice, mechanisms of suspension freezing under conditions of (thermal plus haline) convection should permanently entangle MPs into ice. During further sea ice growth and aging, MPs are repelled from water and ice into air bubbles, brine channels, and to the upper/lower boundaries of the ice column. Sea ice permeability, especially while melting periods, can re-distribute sub-millimeter MPs through the brine channels, thus potentially introducing the variability of contamination with time. In accord with field observations, analysis reveals several competing factors that influence the distribution of MPs in sea ice. A thorough sampling of the upper ice surface, prevention of brine leakage while sampling and handling, considering the ice structure while segmenting the ice core – these steps may be advantageous for further understanding the pattern of plastic contamination in natural ice.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
小小化学人完成签到,获得积分20
刚刚
1秒前
轩然发布了新的文献求助10
1秒前
顾矜应助炙热的橘子采纳,获得10
1秒前
1秒前
2秒前
tyughi完成签到,获得积分10
3秒前
小蚂蚁发布了新的文献求助20
4秒前
4秒前
6秒前
yqb发布了新的文献求助10
6秒前
cuin0发布了新的文献求助10
6秒前
轩然完成签到,获得积分10
7秒前
7秒前
钰钰完成签到,获得积分20
8秒前
8秒前
8秒前
bz发布了新的文献求助10
9秒前
meiyangyang完成签到,获得积分10
9秒前
小鱼发布了新的文献求助10
9秒前
9秒前
零零灵发布了新的文献求助30
10秒前
10秒前
在水一方应助abcd_1067采纳,获得10
11秒前
南宫完成签到,获得积分20
12秒前
13秒前
万能图书馆应助Hohowinnie采纳,获得10
13秒前
zhuzixuan发布了新的文献求助10
13秒前
深情安青应助yrmm采纳,获得10
13秒前
乐观的西装完成签到,获得积分10
13秒前
ehinqz发布了新的文献求助10
13秒前
14秒前
科研通AI5应助勤奋曼雁采纳,获得10
15秒前
15秒前
元谷雪发布了新的文献求助10
15秒前
16秒前
lull发布了新的文献求助10
16秒前
天天快乐应助小蚂蚁采纳,获得10
16秒前
yqb完成签到,获得积分10
17秒前
高分求助中
Les Mantodea de Guyane Insecta, Polyneoptera 2500
Technologies supporting mass customization of apparel: A pilot project 450
A Field Guide to the Amphibians and Reptiles of Madagascar - Frank Glaw and Miguel Vences - 3rd Edition 400
Brain and Heart The Triumphs and Struggles of a Pediatric Neurosurgeon 400
Cybersecurity Blueprint – Transitioning to Tech 400
Mixing the elements of mass customisation 400
Периодизация спортивной тренировки. Общая теория и её практическое применение 310
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3786075
求助须知:如何正确求助?哪些是违规求助? 3331598
关于积分的说明 10251651
捐赠科研通 3046943
什么是DOI,文献DOI怎么找? 1672302
邀请新用户注册赠送积分活动 801223
科研通“疑难数据库(出版商)”最低求助积分说明 760027