E.coli can turn plastic into painkillers, chemists discover

National Post

a day ago

Scientists have found a way to use the bacteria E.Coli to convert plastic waste into a popular painkiller, a study said Monday, though outside experts doubted the technique would make a dent in the fight against plastic pollution.
Article content
Paracetamol, which is one of the most commonly used drugs worldwide, is made from the derivatives of fossil fuels, often by Asia-based subcontractors using cheap, polluting methods that contribute to climate change.
Article content
The world is also facing an escalating crisis of plastic pollution, with countries set for another bruising round of negotiations in August in the hope of sealing an international treaty to reduce plastic waste.
Article content
Article content
The British team of researchers behind the new study sought to find a solution to the two problems by roping in a third — E.coli, which is normally known for making people sick when they eat contaminated food.
Article content
First the chemists used a molecule derived from PET plastic, which is used in bottles and many other plastic products the world over, to spark a chemical reaction in a strain of E.coli.
Article content
This created a molecule they called PABA, according to the Nature Chemistry study, which was partly funded by drug firm AstraZeneca.
Article content
By genetically modifying the bacteria, the chemists were able to transform their molecule into acetaminophen, also known as paracetamol.
Article content
Article content
'This work demonstrates that PET plastic isn't just waste or a material destined to become more plastic — it can be transformed by microorganisms into valuable new products, including those with potential for treating disease,' lead study Stephen Wallace said in a statement.
Article content
Article content
Singaporean researchers not involved in the study praised how it combined synthetic and biological chemistry.
Article content
But 'several practical considerations remain' to take this idea beyond the proof-of-concept stage, they wrote in a linked commentary in the journal Nature Chemistry.
Article content
The chemical reaction produces only a limited amount of PABA molecules, which 'may be insufficient for industrial applications', they wrote.
Article content
Melissa Valliant, communications director of the Beyond Plastics project of Bennington College in the United States, expressed scepticism.
Article content
'These discoveries never scale up to anything significant enough to tackle the massive plastic pollution problem.'
Article content