Environmental researchers at the Leibniz Institute for Baltic Sea Research Warnemünde (IOW) have developed a novel mobile device for recording microplastics in surface waters. They call it the “Rocket”, a design with which depending on the amount of suspended matter in the water up to 60 litres per minute can be sucked through four cartridge filters, and which is particularly advantageous for sampling the fine fraction of the microplastic in the range down to 10 µm. The scientists were specially challenged by the fact that plastic had to be avoided as far as possible. The successful results of the test phase have now been published by them in the international scientific journal “Water”.
Microplastics are omnipresent in the environment. Whether in the Arctic ice, the sand of the Sahara or the sediments of the deep sea – environmental researchers find these artificial particles everywhere. Figures on how much of this occurs in the environment, however, are usually based on estimates only.
Due to its variable behaviour in the environment, its similarity to natural components and the fact that microplastics are often masked by biofilm growth, it is difficult and time-consuming to record these particles.
To make matters worse, in our plastic world the postulate of contamination-free sampling also poses an enormous challenge: whether it is the clothing of the sample taker, the sampling equipment or the sample vessels themselves: any plastic material must be avoided when microplastics are detected.
Robin Lenz and Matthias Labrenz, the authors of the scientific article in “Water”, are investigating the main entry pathways for microplastics into the Baltic Sea along a river system, and under which circumstances microplastics already introduced in the course of the river can be removed again. Their “model river” is the Warnow. For the extensive sampling campaigns, they now developed a device, which, in its silvery aluminium box equipped with hoses and levers, looks like the props of a 70s science fiction movie and was therefore nicknamed “The Rocket”.
“Rocket” offers many advantages over conventional sampling techniques. Two effects in particular had to be avoided: Conventional techniques, which usually use plankton nets for sampling, are particularly prone to errors in fine microplastics in the micrometer range.
Either the mesh size of the nets is too large to catch the very small microplastic fraction, or, in the case of very small mesh sizes, the nets quickly clog. Swirls in the area of the net opening then drive the microplastic out of the net again.
This does no longer happen with the parallel cartridge filters in the closed “Rocket” system. All particles larger than 10 µm are collected. Another disadvantage of the net technology was eliminated with the “Rocket”, too: The device is constructed almost completely without plastic.
Only one type of plastic, the relatively rare PTFE (polytetrafluoroethylene), was used inside the closed system. This means that contamination-free sampling can be assumed for all other plastic polymers.
The MicroCatch_Balt project is funded by the German Federal Ministry of Education and Research (BMBF) within the research focus Plastics in the Environment. The research focus “Plastics in the environment – Sources, sinks, solutions” is part of the Green Economy lead initiative of the BMBF framework programme “Research for Sustainable Development” (FONA3).
Press and public relation:
Dr. Barbara Hentzsch | +49 381 5197-102 | email@example.com
Dr. Kristin Beck | +49 381 5197-135 | firstname.lastname@example.org
IOW is a member of the Leibniz Association with currently 93 research institutes and scientific infrastructure facilities. The focus of the Leibniz Institutes ranges from natural, engineering and environmental sciences to economic, social and space sciences as well as to the humanities. The institutes are jointly financed at the state and national levels. The Leibniz Institutes employ a total of 19.100 people, of whom 9.900 are scientists. The total budget of the institutes is 1.9 billion Euros. (http://www.leibniz-association.eu)
Robin Lenz | email@example.com
PD Dr. Matthias Labrenz | firstname.lastname@example.org
Working Group Environmental Microbiology, Leibniz Institute for Baltic Sea Research Warnemünde
Lenz, R.; Labrenz, M.: Small Microplastic Sampling in Water: Development of an Encapsulated Filtration Device. Water 2018, 10, 1055; DOI: 10.3390/w10081055; URL: http://www.mdpi.com/2073-4441/10/8/1055.
Dr. Barbara Hentzsch | idw - Informationsdienst Wissenschaft
Lights on fishing nets save turtles and dolphins
06.12.2019 | University of Exeter
For some corals, meals can come with a side of microplastics
04.12.2019 | University of Washington
University of Texas and MIT researchers create virtual UAVs that can predict vehicle health, enable autonomous decision-making
In the not too distant future, we can expect to see our skies filled with unmanned aerial vehicles (UAVs) delivering packages, maybe even people, from location...
With ultracold chemistry, researchers get a first look at exactly what happens during a chemical reaction
The coldest chemical reaction in the known universe took place in what appears to be a chaotic mess of lasers. The appearance deceives: Deep within that...
Abnormal scarring is a serious threat resulting in non-healing chronic wounds or fibrosis. Scars form when fibroblasts, a type of cell of connective tissue, reach wounded skin and deposit plugs of extracellular matrix. Until today, the question about the exact anatomical origin of these fibroblasts has not been answered. In order to find potential ways of influencing the scarring process, the team of Dr. Yuval Rinkevich, Group Leader for Regenerative Biology at the Institute of Lung Biology and Disease at Helmholtz Zentrum München, aimed to finally find an answer. As it was already known that all scars derive from a fibroblast lineage expressing the Engrailed-1 gene - a lineage not only present in skin, but also in fascia - the researchers intentionally tried to understand whether or not fascia might be the origin of fibroblasts.
Fibroblasts kit - ready to heal wounds
Research from a leading international expert on the health of the Great Lakes suggests that the growing intensity and scale of pollution from plastics poses serious risks to human health and will continue to have profound consequences on the ecosystem.
In an article published this month in the Journal of Waste Resources and Recycling, Gail Krantzberg, a professor in the Booth School of Engineering Practice...
03.12.2019 | Event News
15.11.2019 | Event News
15.11.2019 | Event News
06.12.2019 | Earth Sciences
06.12.2019 | Life Sciences
06.12.2019 | Information Technology