A recent study reveals that microscopic particles released from brake pads can be more harmful than diesel exhaust emissions. This finding challenges the belief that transitioning to electric vehicles (EVs) alone can eliminate vehicle-related pollution.
The research, conducted by the University of Southampton and published in Particle and Fibre Toxicology, highlights how brake pad dust, particularly from specific chemical compositions, poses significant health risks. The study found that higher copper concentrations in some commonly used brake pads were linked to increased toxicity, especially when inhaled, impacting sensitive lung cells.
While exhaust emissions have long been the focus of pollution concerns, non-exhaust sources like brake, tyre, and road wear now account for most vehicle particulate matter emissions in the UK and parts of Europe. Brake dust is the primary contributor, and current legislation largely overlooks these emissions.
Dr James Parkin, the study’s lead author, stated: “People often think EVs are zero-emission, but they still produce particulate matter from road, tyre, and brake wear. We wanted to understand how brake pad composition affects toxicity and human health.“
The researchers analyzed four types of brake pads: low metallic, semimetallic, non-asbestos organic, and hybrid-ceramic. Shockingly, non-asbestos organic pads were the most toxic, inducing inflammation and damage to human lung cells even more than diesel exhaust particles. Ceramic pads ranked second in toxicity.
This study underscores the need for stricter regulations on non-exhaust emissions and the development of safer, more sustainable brake technologies to achieve cleaner transportation. Read More
News Credit: The Guardian
Picture Credit: Geopix/Alamy