0

WHY THIS MATTERS IN BRIEF

Some chemicals either never break down or take millennia but now we have a way to break them down on demand using a new method.

 

Love the Exponential Future? Join our XPotential Community, future proof yourself with courses from XPotential University, read about exponential tech and trendsconnect, watch a keynote, or browse my blog.

The world seems to have lots of issues at the moment, from plastic floating around the ocean, climate change, deforestation, and the general trashing of the planet, and even though in many cases we have solutions to these problems so far one problem we don’t have a solution for is “Forever Chemicals.”

 

RELATED
Drax announces the worlds largest negative emissions energy project

 

Toxic PFAS compounds earn themselves the nickname of forever chemicals thanks to their tendency to persist in the environment for decades, and in a new study chemists claim to have found an Achilles’ heel to these ultra-stable molecules, using a relatively simple chemical reaction to “decapitate” some kinds of PFAS into benign end products.

Per- and Polyfluoroalkyl Substances (PFAS) is an umbrella term for thousands of chemicals that have been commonly used for their water-repelling properties in products such as non-stick cookware, food packaging, waterproof clothing and firefighting foam. However, a growing body of research over the last few decades has linked PFAS chemicals to a range of health problems, such as diabetes, infertility, hypothyroidism, and kidney and liver cancer, leading the US Environmental Protection Agency (EPA) to lower the safe threshold in drinking water to near zero.

 

RELATED
A green energy revolution in the making, electric plants bring light to homes

 

Worse still, decades of widespread use coupled with an infamously long life means that exposure is hard to avoid. A recent study found that PFAS levels in rainwater all over the world exceed the EPA’s guidelines, even in samples taken from remote areas like Antarctica or the Tibetan Plateau.

Scientists have been investigating ways to break down the chemicals using boron nitride powders or photochemical reactions. In the new study, researchers at Northwestern University have found a new way to degrade PFAS compounds using simple and inexpensive chemicals and under mild conditions.

PFAS gets its incredible and frustrating stability from its molecular structure – it’s made up mostly of carbon and fluorine bonds, which are the strongest known to organic chemistry. But the team discovered a weakness at the head of the molecule, where charged groups of atoms like oxygen can be found.

 

RELATED
Innovative Ocean Battery stores renewable energy at the bottom of the deep sea

 

The team targeted this area instead, by heating PFAS samples to between 80 and 120 °C (176 and 248 °F) in dimethyl sulfoxide as a solvent and sodium hydroxide as a reagent. And sure enough, this head group was “decapitated” from the molecule, leaving a reactive tail that cascaded through the structure.

“That triggered all these reactions, and it started spitting out fluorine atoms from these compounds to form fluoride, which is the safest form of fluorine,” said William Dichtel, lead author of the study. “Although carbon-fluorine bonds are super strong, that charged head group is the Achilles’ heel.”

Using this process, the team successfully broke down 10 different types of PFAS, including PFOA and a particularly problematic chemical known as GenX, degrading up to 100% within 24 hours. The researchers say future work will continue testing the method on other types of PFAS, of which there are thousands.

The research was published in the journal Science.

Source: Northwestern University

About author

Matthew Griffin

Matthew Griffin, described as “The Adviser behind the Advisers” and a “Young Kurzweil,” is the founder and CEO of the World Futures Forum and the 311 Institute, a global Futures and Deep Futures consultancy working between the dates of 2020 to 2070, and is an award winning futurist, and author of “Codex of the Future” series. Regularly featured in the global media, including AP, BBC, Bloomberg, CNBC, Discovery, RT, Viacom, and WIRED, Matthew’s ability to identify, track, and explain the impacts of hundreds of revolutionary emerging technologies on global culture, industry and society, is unparalleled. Recognised for the past six years as one of the world’s foremost futurists, innovation and strategy experts Matthew is an international speaker who helps governments, investors, multi-nationals and regulators around the world envision, build and lead an inclusive, sustainable future. A rare talent Matthew’s recent work includes mentoring Lunar XPrize teams, re-envisioning global education and training with the G20, and helping the world’s largest organisations envision and ideate the future of their products and services, industries, and countries. Matthew's clients include three Prime Ministers and several governments, including the G7, Accenture, Aon, Bain & Co, BCG, Credit Suisse, Dell EMC, Dentons, Deloitte, E&Y, GEMS, Huawei, JPMorgan Chase, KPMG, Lego, McKinsey, PWC, Qualcomm, SAP, Samsung, Sopra Steria, T-Mobile, and many more.

Your email address will not be published. Required fields are marked *