Agriculture is project to be one of the industries contributing biodegradable plastics to the environment (Credit Getty Images)

Agriculture is project to be one of the industries contributing biodegradable plastics to the environment (Credit Getty Images)

Biodegradable packaging and products are seen by many as part of the solution to the global plastics crisis. However, until now, there has been very little research examining their precise fate and impact in the open environment.

To address that, a team of UK scientists has been awarded £2.6million for a four-year project assessing how these materials break down and, in turn, whether the plastics or their breakdown products affect species both on land and in the marine environment.

BIO-PLASTIC-RISK is being supported by a grant from the Natural Environment Research Council, part of UK Research and Innovation. It is being led by researchers at the University of Plymouth, including its world-renowned International Marine Litter Research Unit, working alongside colleagues at the University of Bath and Plymouth Marine Laboratory.

The project brings together a team of marine and terrestrial biologists, material and polymer scientists, and ecotoxicologists, and will expand on extensive previous research by the partners into the causes and effects of microplastic pollution.

Among its key objectives will be to develop a better understanding of biodegradable materials, how they react on entering the environment, and how their characteristics can be tailored to minimise any potential risks. It will also explore any effects the chemicals added to the plastics might have on organisms, how that, in turn, affects wider ecosystems and whether certain parts of our environment are more at risk than others.

In addition to the academic involvement, the project partners include representatives from the global textiles and packaging industry, and an advisory group representing Government agencies, biodegradable bioplastics producers, commercial users, water authorities and NGOs.

Researchers believe the project will ultimately also be of interest to sustainability experts and social scientists, helping to guide understanding about any positive effects biodegradable materials can have for the circular economy and to inform behaviour change initiatives in relation to packaging choices and disposal.

Professor Richard Thompson OBE FRS, Head of the International Marine Litter Research Unit at the University of Plymouth, is Principal Investigator on the project. His team previously coordinated research that showed that biodegradable bags can hold a full load of shopping three years after being discarded in the environment. He said:

“This is a truly ground-breaking project. For years, biodegradable materials – including plant-based bioplastics – have been highlighted for their potential to reduce the environmental impact of packaging waste. However, there hasn’t been the detailed research to identify precisely how that might be achieved. Through this project, we hope to establish, in the open environment as opposed to managed waste systems, what works and what doesn’t, in terms of the materials’ characteristics and effects. But we can also explore how best to bring about the changes required to move from our throwaway society and help maximise the benefits of plastics without the current levels of largely unintended environmental and economic impacts.”

Professor Richard Thompson
Professor Richard Thompson OBE

Professor Pennie Lindeque, Head of Science for Marine Ecology and Biodiversity at Plymouth Marine Laboratory, said:

“Biodegradable materials have the potential to provide an alternative to traditional plastics, thereby helping to reduce the impacts of plastic waste. However, we must be sure that such materials – biodegradable bioplastics (BBPs) – and the chemicals they contain, do in fact demonstrate little or no impact on organisms and ecosystems. At PML, we will contribute to this project by establishing the potential toxicity of BBP fragments and chemical additives, as well as determining the interaction of BBPs with ecological and biogeochemical process, in the marine environment.”

Read more about the BIO-PLASTIC-RISK project on the Gateway to Research website

Dr Antoine Buchard, Reader in Chemistry within the University of Bath’s Centre for Sustainable and Circular Technologies and a Royal Society University Research Fellow, added:

“We use plastics because they can do things that other materials cannot. But because of misguided utilisation, their environmental impact has been overshadowing their benefits. The solution is not to ban plastics altogether: there is rather an opportunity to redesign plastics and how we use them. The reliance of plastics on dwindling fossil fuels is real, and bioplastics, those derived from renewable feedstocks such as plants, are part of the solution to make plastics sustainable. With circular economy concepts in mind, while recycling and reuse of bioplastics need to be maximised, we cannot ignore that some will leak in the environment, in particular the seas, so it is important to understand how they can be designed, at the molecular level, to not have any negative impact on the environment, while remaining fit for purpose.”

University staff involved in the project

Read more information linked to this article

International Marine Litter Research Unit

Marine litter is a global environmental problem with items of debris now contaminating habitats from the poles to the equator, from the sea surface to the deep sea.

Furthering our understanding of litter on the environment and defining solutions

Find out more about the International Marine Litter Research Unit
Marine litter

The Queen's Anniversary Prize for pioneering research on marine microplastics pollution and its impact on the environment and changing behaviour

Nearly two decades of world-leading research into the effects of marine plastics on our environment by Plymouth researchers, led by Professor Richard Thompson OBE FRS, has received the highest honour that can be bestowed upon a higher education institution.

Recognition for our discovery of microplastics

Toxic plastic waste floating under the surface of the ocean and contaminating water, pollution and environmental damage.

The activity highlighted here is funded by the Natural Environment Research Council (NERC)

NERC is the UK's main agency for funding and managing research, training and knowledge exchange in the environmental sciences. Our work covers the full range of atmospheric, Earth, biological, terrestrial and aquatic science, from the deep oceans to the upper atmosphere and from the poles to the equator. We coordinate some of the world's most exciting research projects, tackling major environmental issues such as climate change, environmental influences on human health, the genetic make-up of life on Earth, and much more.

NERC is part of UK Research & Innovation, a non-departmental public body funded by a grant-in-aid from the UK government.