Application of confocal laser Raman spectroscopy on marine sediment microplastics

Jing LIU; Xin ZHANG; Zengfeng DU; Zhendong LUAN; Lianfu LI; Shichuan XI; Bing WANG; Lei CAO; Jun YAN

doi:10.1007/s00343-020-0129-z

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Application of confocal laser Raman spectroscopy on marine sediment microplastics

Geology | Updated：2023-04-27

- Application of confocal laser Raman spectroscopy on marine sediment microplastics
- Journal of Oceanology and Limnology Vol. 38, Issue 5, Pages: 1502-1516(2020)
- Affiliations：
  
  1.Key Laboratory of Marine Geology and Environment & Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
  2.Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China
  3.University of Chinese Academy of Sciences, Beijing 100049, China
  4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
- Author bio：
- Funds：
- DOI：10.1007/s00343-020-0129-z
  CLC：
- Received：17 March 2020，
  
  Accepted：07 May 2020，
  
  Online First：07 July 2020，
  
  Published：2020-09
- Accepted：
Scan QR Code
Jing LIU, Xin ZHANG, Zengfeng DU, et al. Application of confocal laser Raman spectroscopy on marine sediment microplastics[J]. Journal of Oceanology and Limnology, 2020, 38(5): 1502-1516.
DOI：

Jing LIU, Xin ZHANG, Zengfeng DU, et al. Application of confocal laser Raman spectroscopy on marine sediment microplastics[J]. Journal of Oceanology and Limnology, 2020, 38(5): 1502-1516. DOI： 10.1007/s00343-020-0129-z.

摘要

Abstract

Marine sediment is the primary sink of microplastics and is an indicator of pollution levels. However

although there are well-developed detection methods

detection is rarely focused on lowmicrometer-sized particles

mainly due to technique limitations. In this study

a simplified process omitting digestion procedures was developed to pretreat microplastics obtained from marine sediment and was coupled with micro-Raman spectroscopy to identify microplastics. Based on the overall analysis of the characteristic peak assignments

a Raman spectral reference library was constructed for 18 types of plastic. In addition

the effects of the measurement parameters were systematically described. Field research was then conducted to validate the developed process and investigate microplastic contamination in Huiquan Bay

Qingdao

China. This simplified process could retain the original appearance of microparticles and accomplish the detection of < 500 μm-sized microplastics in environmental samples. Microplastics in the size range of 10-150 μm accounted for 76% of all microplastics

and 56% of the total particles was particles smaller than 50 μm. Polypropylene (42%) and polyethylene (20%) were predominant components of the particles. In particular

polypropylene particles smaller than 10 μm were identified in marine sediment. This work demonstrates that Raman spectroscopy is not only an effective tool for detecting environmental particles but also highly applicable for identifying particles extracted from marine sediment.

关键词

Keywords

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College of Marine Sciences, Hainan University

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