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Evaluating the effectiveness of the MicroPlastic Sediment Separator (MPSS)

Title data

Prume, Julia A. ; Laermanns, Hannes ; Löder, Martin G. J. ; Laforsch, Christian ; Bogner, Christina ; Koch, Martin:
Evaluating the effectiveness of the MicroPlastic Sediment Separator (MPSS).
In: Microplastics and Nanoplastics. Vol. 3 (2023) . - 26.
ISSN 2662-4966

Official URL: Volltext

Project information

Project title:
Project's official title
Project's id
SFB 1357 Mikroplastik

Project financing: Deutsche Forschungsgemeinschaft

Related research data

Abstract in another language

Effective laboratory methods are a requirement to obtain accurate data on the contamination of the environment with microplastics. However, current methods often lack specification and validation of performance. The aim of this work was to provide the first evaluation of the effectiveness of the commercially available MicroPlastic Sediment Separator (MPSS) operated with sodium chloride. We performed density separation experiments with pristine plastic particles spiked into both commercial sand (experiment I) and natural river sediments (experiment II) and with environmental microplastics contained in natural river sediments (experiment III). The natural sediments were taken from the Lahn River in Germany, a medium-scale central European tributary. The pristine test particles were ground polypropylene fragments, sieved in three different size classes: larger than 1 mm, 0.5–1 mm, and 0.3–0.5 mm. In experiment I, the mean recovery rate was 97 % for particles of the largest size class (standard deviation s = 6%; n = 30 per size class), but dropped to 75.33 % (s = 21,29 %) in the medium and to 54 % (s = 25% ) in the smallest size class. After density separation, 87 % of all unsuccessfully separated test particles were found at the inner walls of the MPSS. In experiment II, the recovery rate was not correlated with the particle size distribution of the natural river sediments. In experiment III, a subsequent second density separation step contributed on average 38 % (s = 18 %; n = 5) to the total number of extracted environmental microplastics. This study illuminates central aspects of a density separation and aims to contribute to quality improvements of recovery rate experiments and field studies for the generation of reliable data on microplastics in the environment.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Research Institutions > Central research institutes > Bayreuth Center of Ecology and Environmental Research- BayCEER
Research Institutions > Collaborative Research Centers, Research Unit > SFB 1357 - MIKROPLASTIK
Graduate Schools > Bayreuth Graduate School of Mathematical and Natural Sciences (BayNAT)
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Central research institutes
Research Institutions > Collaborative Research Centers, Research Unit
Graduate Schools
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
500 Science > 540 Chemistry
500 Science > 550 Earth sciences, geology
500 Science > 570 Life sciences, biology
Date Deposited: 24 Nov 2023 09:11
Last Modified: 06 Feb 2024 14:11