Producing fragmented micro- and nano-plastics from expanded polystyrene with an accelerated mechanical abrasion experiment

Title
Producing fragmented micro- and nano-plastics from expanded polystyrene with an accelerated mechanical abrasion experiment
Author(s)
심원준; 송영경; 홍상희; 장미; 한기명; 정승원
KIOST Author(s)
Shim, Won Joon(심원준)Song, Young Kyoung(송영경)Hong, Sang Hee(홍상희)Jang, Mi(장미)Han, Gi Myung(한기명)Jung, Seung Won(정승원)
Publication Year
2014-10-23
Abstract
Fragmented secondary microplastic particles account for the majority of microplastics and have various origins,which makes proper control difficult. Photo-oxidation and mechanical abrasion on beaches and (or) sea surfaceare thought to be major weathering and fragmentation process for generating secondary microplastic particles.None of scientific information is, however, available where and how secondary microplastics are produced.Fragmentation of expanded polystyrene (EPS), one of top three polymer types in marine debris monitoring studywas done with an accelerated mechanical abrasion experiment in a laboratory. Forty EPS spherules detached froma EPS float were placed in an amber bottle with glass bead (3 mm in diameter) or natural sand (pre-combusted at450°C), respectively. The bottles were rotated with a tumbler for a month at 113 rpm. Fragmented EPS particleswere extracted by density separation with deionized water and identified with microscopic FT-IR, SEM andfluorescence microscope after Nile Red staining. After mechanical abrasion, apparent surface damage of EPSspherules was observed by SEM analysis. The hundreds of micron scale EPS particles were identified with FTIR.The EPS particles were selectively stained with Nile Red and subsequently identified and quantified under afluorescent microscope. EPS particles obviously outnumbered the control and were quantifiable. Number of EPSpartie major weathering and fragmentation process for generating secondary microplastic particles.None of scientific information is, however, available where and how secondary microplastics are produced.Fragmentation of expanded polystyrene (EPS), one of top three polymer types in marine debris monitoring studywas done with an accelerated mechanical abrasion experiment in a laboratory. Forty EPS spherules detached froma EPS float were placed in an amber bottle with glass bead (3 mm in diameter) or natural sand (pre-combusted at450°C), respectively. The bottles were rotated with a tumbler for a month at 113 rpm. Fragmented EPS particleswere extracted by density separation with deionized water and identified with microscopic FT-IR, SEM andfluorescence microscope after Nile Red staining. After mechanical abrasion, apparent surface damage of EPSspherules was observed by SEM analysis. The hundreds of micron scale EPS particles were identified with FTIR.The EPS particles were selectively stained with Nile Red and subsequently identified and quantified under afluorescent microscope. EPS particles obviously outnumbered the control and were quantifiable. Number of EPSparti
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25925
Bibliographic Citation
PICES 2014 Annual Meeting, pp.96, 2014
Publisher
The North Pacific Marine Science Organization
Type
Conference
Language
English
Publisher
The North Pacific Marine Science Organization
Related Researcher
Research Interests

Microplastic pollution,Persistent Organic Pollutants,Oil Pollution,미세플라스틱 오염,잔류성 유기오염물질,유류오염

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