Valerio Ferracci

@atmosvf.bsky.social

Atmospheric Chemist at NPL. Views are my own. he/him

Forgot to post this — new(ish) air cleaner paper! In work led by Nadia Tahsini, we showed that catalyst- and charcoal-based air cleaners can lower levels of many indoor air pollutants, including those formed by germicidal UV lamps. pubs.acs.org/doi/10.1021/...

Mitigation of Indoor Ozone and Secondary Products from 222 nm Germicidal Ultraviolet Light Using Commercial Air Cleaners

Far ultraviolet-C (UVC) light, especially germicidal UV light at 222 nm (GUV222), has received considerable attention for its potential to deactivate airborne pathogens indoors and prevent the spread of infectious disease. However, GUV222 also generates ozone (O3), posing human health risks and initiating additional photochemistry that may degrade indoor air quality. Air cleaners present an opportunity to counteract the drawbacks of GUV222 by removing harmful byproducts; however, to our knowledge, this has never been demonstrated. Here, we conduct laboratory experiments in a 7.5 m3 Teflon chamber using two commercially available air cleaners─a manganese-oxide-catalyst “ozone cleaner” and an activated-carbon-HEPA “volatile organic compound (VOC) + particulate matter (PM) cleaner”─each simultaneously with a GUV222 lamp. We show that both cleaner types remove a wide range of key pollutants, including O3, NO2, formaldehyde, VOCs, and particles. Application of chamber results to a photochemical model simulating chemistry in a 150 m3 room suggests that a single cleaner can achieve modest reductions in O3 levels and substantial reductions in secondary pollutant levels within typical indoor environments. These results indicate that indoor air pollutants from GUV222 can be mitigated through the use of air cleaning technology, thereby improving indoor air quality while maximizing the potential benefit of germicidal UV for human health.

pubs.acs.org

Presentations from last year's Air Quality in the 21st Century are now online: www.rsc-ecg.com/blog We're looking forward to 2025 edition - 15th December. Registration and call for papers will open in September.

Resources | Environmental Chemistry Group (RSC ECG)

rsc-ecg.com

Valerio Ferracci@atmosvf.bsky.social · last yr.

🚨 Save the date 📅 Join us on 15th December for the latest insights into #AirQuality with presentations from DEFRA's Air Quality Expert Group 📝 Call for abstracts & registration details will be circulated in Sept 2025 @rsc.org @rscecg.bsky.social @drgaryfuller.bsky.social @ukcleanair.bsky.social

In scientific research, underrepresentation and discrimination of people from sexual and gender minorities raises significant concerns over equality, damages innovation, and threatens the wellbeing of staff. Let’s recognise, empower and celebrate LGBTQ+ communities in science and beyond 🏳️‍🌈

A person carries a large Pride flag. The sky is bright blue, and the person is surrounded by some greenery. On a yellow background, text says: ‘Science professionals who are lesbian, gay, transgender, bisexual, queer, intersex, and asexual (LGBTQ+) are more likely to experience career limitations, harassment, and professional devaluation than their peers. In scientific research, underrepresentation and discrimination of people from sexual and gender minorities casts a shadow over our future.’In an indistinguishable crowd of people, a hand is raised in the air, holding a small Pride flag. The scenery is urban, with tall brown buildings all around. On a yellow background, text says: ‘People who are LGBTQ+ may also have intersectional identities – where they belong to more than one minority group or have more than one protected characteristic. They may be dealing with intersectional issues, such as transphobia and racism, ableism and sexism, and so on. There is no place in science, or outside of it, for prejudice. But there is plenty of space for recognition and support.’On a yellow background, text says: ‘5 ways to support LGBTQ+ scientists: Diversify your social media feed. Your activity on social media can help foster a more inclusive research environment. / Actively seek out LGTBQ+ voices to help understand new concepts, perspectives and ideas. / Embrace inclusive language and gender pronouns. If you make a mistake, apologise, correct it, learn from it and move on. / Get involved with community events as an ally. / Recognise and champion diverse role models where you can.’

Check out the latest research from our group at UC Irvine. We show that some plants (e.g., sedges and cypresses) can significantly increase their volatile emissions during a heatwave and adversely impact air quality. #BVOC @huiwangisop.bsky.social ps.uci.edu/news/3258

When Green Turns Gray: How Heatwaves Turn Plants into Unexpected Polluters

New UC Irvine research reveals how extreme heat events can make everyday greenery a hidden contributor to air pollution.

ps.uci.edu

Are you interested in doing a really exciting PhD to understand the impact of higher temperatures and heatwaves on concentrations of volatile organic compounds in cities and how these will change UK urban air quality? www.findaphd.com/phds/project...

Understanding air pollution in a warming world at University of York on FindAPhD.com

PhD Project - Understanding air pollution in a warming world at University of York, listed on FindAPhD.com

findaphd.com