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Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy

Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy
Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy
A non-contact method for identification of sparsely distributed plastic pellets is proposed by integrating holography and Raman spectroscopy in this study. Polystyrene (PS) and poly(methyl methacrylate) (PMMA) resin pellets with a size of 3 mm located in a 20 cm water channel were illuminated using a collimated continuous wave laser beam with a diameter of 4 mm and wavelength of 785 nm. The same laser beam was used to take a holographic image and Raman spectrum of a pellet to identify the shape, size and composition of material. Using the compact system, the morphological and chemical analysis of pellets in a large volume of water was performed. The reported novel method demonstrates the potential for compact non-contact continuous in situ monitoring of microplastics in water without collection and separation.
0003-6935
5073-5078
Takahashi, Takahashi
db1c63d1-c951-4e99-91f7-6ca94248dd88
Liu, Zonghua
76b789cb-cddf-49c2-89dd-ca8a56997486
Thevar, Thangeval
94339031-1bf3-4b2c-b149-a0694e9029e5
Burns, Nicholas
ec00597b-5a8b-4af1-8a42-252be6c61438
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Lindsay, Dhugal
95b74b27-090f-4b4c-9b2d-892dbc8e6f54
Watson, John
5b87c996-09db-49f2-b114-404dcc418915
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Takahashi, Takahashi
db1c63d1-c951-4e99-91f7-6ca94248dd88
Liu, Zonghua
76b789cb-cddf-49c2-89dd-ca8a56997486
Thevar, Thangeval
94339031-1bf3-4b2c-b149-a0694e9029e5
Burns, Nicholas
ec00597b-5a8b-4af1-8a42-252be6c61438
Mahajan, Sumeet
b131f40a-479e-4432-b662-19d60d4069e9
Lindsay, Dhugal
95b74b27-090f-4b4c-9b2d-892dbc8e6f54
Watson, John
5b87c996-09db-49f2-b114-404dcc418915
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9

Takahashi, Takahashi, Liu, Zonghua, Thevar, Thangeval, Burns, Nicholas, Mahajan, Sumeet, Lindsay, Dhugal, Watson, John and Thornton, Blair (2020) Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy. Applied Optics, 59 (17), 5073-5078. (doi:10.1364/AO.393643).

Record type: Article

Abstract

A non-contact method for identification of sparsely distributed plastic pellets is proposed by integrating holography and Raman spectroscopy in this study. Polystyrene (PS) and poly(methyl methacrylate) (PMMA) resin pellets with a size of 3 mm located in a 20 cm water channel were illuminated using a collimated continuous wave laser beam with a diameter of 4 mm and wavelength of 785 nm. The same laser beam was used to take a holographic image and Raman spectrum of a pellet to identify the shape, size and composition of material. Using the compact system, the morphological and chemical analysis of pellets in a large volume of water was performed. The reported novel method demonstrates the potential for compact non-contact continuous in situ monitoring of microplastics in water without collection and separation.

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TT_ApliedOptics_2020_manuscript_revision_submission_final - Accepted Manuscript
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Accepted/In Press date: 7 May 2020
Published date: 10 June 2020

Identifiers

Local EPrints ID: 440798
URI: http://eprints.soton.ac.uk/id/eprint/440798
ISSN: 0003-6935
PURE UUID: 6e31b91d-dc5a-49b3-be5a-74e479da3432
ORCID for Sumeet Mahajan: ORCID iD orcid.org/0000-0001-8923-6666

Catalogue record

Date deposited: 19 May 2020 16:30
Last modified: 18 Feb 2021 17:09

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