Samuel V. Panno, Walton R. Kelly, John Scott, Wei Zheng, Rachael E. McNeish, Nancy Holm, Timothy J. Hoellein, Elizabeth L. Baranski. Microplastic Contamination in Karst Groundwater Systems. Groundwater, 2019; DOI: 10.1111/gwat.12862
Microplastics contaminate the world’s surface waters, yet scientists have only just begun to explore their presence in groundwater systems. A new study is the first to report microplastics in fractured limestone aquifers — a groundwater source that accounts for 25 percent of the global drinking water supply. …
…The researchers identified a variety of household and personal health contaminants along with the microplastics, a hint that the fibers may have originated from household septic systems.
“Imagine how many thousands of polyester fibers find their way into a septic system from just doing a load of laundry,” Scott said. “Then consider the potential for those fluids to leak into the groundwater supply, especially in these types of aquifers where surface water interacts so readily with groundwater.”…
S. E. Nelms, J. Barnett, A. Brownlow, N. J. Davison, R. Deaville, T. S. Galloway, P. K. Lindeque, D. Santillo, B. J. Godley. Microplastics in marine mammals stranded around the British coast: ubiquitous but transitory?Scientific Reports, 2019; 9 (1) DOI: 10.1038/s41598-018-37428-3
Microplastics have been found in the guts of every marine mammal examined in a new study of animals washed up on Britain’s shores.
Researchers from the University of Exeter and Plymouth Marine Laboratory (PML) examined 50 animals from 10 species of dolphins, seals and whales — and found microplastics (less than 5mm) in them all.
Most of the particles (84%) were synthetic fibres — which can come from sources including clothes, fishing nets and toothbrushes — while the rest were fragments, whose possible sources include food packaging and plastic bottles.
“It’s shocking — but not surprising — that every animal had ingested microplastics,” said lead author Sarah Nelms, of the University of Exeter and PML.
“The number of particles in each animal was relatively low (average of 5.5 particles per animal), suggesting they eventually pass through the digestive system, or are regurgitated.
“We don’t yet know what effects the microplastics, or the chemicals on and in them, might have on marine mammals.
“More research is needed to better understand the potential impacts on animal health.”…