John Volckens

Our #OpenAccess @natcomms paper on metals in air and racial segregation: rdcu.be/cYKf9 Take home 1/5: 1. Racial/ethnic disparities in exposure to toxic metals (in air) is much worse than what has been reported for PM2.5 mass (up to 300% worse). That's really bad.

Multiple TT positions in engineering using artificial intelligence. Come work at #CSU in a great city and with awesome colleagues! Colorado State University | Engineering with Artificial Intelligence Assistant/Associate Professor - All Fields jobs.colostate.edu/postings/153073

Summer 2020 and 2023 each had more unhealthy PM2.5 days of exposure than all previous years COMBINED this century.

After decades of decline in US air pollution, 2023 became the worst Summer on record for PM2.5 this century. #wildfire is here and it’s here to stay. pubs.acs.org/doi/10.1021/ac…

@gould_cf I had a PhD student win best paper of the year in journal #4, following rejections by 1, 2 & 3. The best science is often different from all that came before and that can be hard for the establishment to acknowledge. Keep at it!

On a personal best for rejections for a single paper (5)!

Dr. Wall told me she created SOGES at CSU so that faculty had a refuge where scholarly conversation and collaboration could flourish, unhindered by academic barriers. She succeeded in that vision, in a space where many before her did not. Thank you, Diana.

Most evaluations of low-cost #aerosol sensors have focused on their measurement bias compared to regulatory monitors. Few evaluations have applied fundamental principles of aerosol science to increase our understanding of how such sensors work and could be improved... READ MORE🔎

Boom. This new annual PM2.5 limit (9 ug/m3) chosen by EPA represents great progress towards cleaner, healthier air for everyone. In Colorado, you can expect visibility to improve along the Front Range as a result. stocks.apple.com/AKFmRuyA7Tr2fW…

Your future home town, our lab (bottom left).

Come work with us! @CSUMechEngr is hiring in Sustainable Engineering (tenure track, asst or assoc prof). We have strengths in energy, air quality, climate, health & materials. Colorado (esp Fort Collins) is an awesome place to live. jobs.colostate.edu/postings/137514 @CSUEnergy

@eddericu @robwiss @Jess_Tryner @ASTJournal @SureshDhaniyala CH1 is the raw data channel from the PMS5003. It’s highly correlated with PM1 but not the same.

@Smogdr @robwiss @Jess_Tryner @ASTJournal @SureshDhaniyala CH1? Do you mean PM1?

Teardown-> model of the #PMS5003 PM sensor shows 1. It’s a PM counter, not a nephelometer. 2. It can count 0.3-0.5 um particles and that’s about it. 3. It CANNOT report PM size distributions, PM coarse, PM10 @Jess_Tryner @ASTJournal @SureshDhaniyala tandfonline.com/doi/full/10.10…

@DavidElfstrom @Jess_Tryner @ASTJournal @SureshDhaniyala Story remains the same whether you use a Piera IPS 7100 or a Sensirion SPS 30…. pubs.acs.org/doi/full/10.10…

@eddericu @robwiss @Jess_Tryner @ASTJournal @SureshDhaniyala The only bin worth using is CH1. CADR will change with particle size so the PMS5003 is giving you an estimate of the accumulation mode CADR.

@Smogdr @robwiss @Jess_Tryner @ASTJournal @SureshDhaniyala Thanks for sharing! What are the implications for measuring CADR of an air cleaner or, say fit factor of a PAPR? If we have a PMS5003, should we use wood smoke as the aerosol source? And just sum up the number of particles across bins to get an unbiased estimate?

We are pleased to inform you of two new funding opportunities for qualified research teams. RFQ E23-1: Study #AirQuality trends associated with oil & gas development. RFQ E23-2: Explore #groundwater quality in the Marcellus region. Learn more: tinyurl.com/mwf7n5sz

@EHPonline @CSUMechEngr @NIEHS Our commentary on disaster response research. Bottom line: we’re seeing more disasters every year and we need to do better.

NEW COMMENTARY: Health Research in the Wake of Disasters: Challenges and Opportunities for Sensor Science ➡️ ow.ly/8U6Q50P1FfL @CSUMechEngr @NIEHS @Smogdr

Worried about all that smoke outside? Wearing a well-fitting N95 outdoors will make a big difference. @projectn95 agupubs.onlinelibrary.wiley.com/doi/full/10.10…

@ukhadds I noticed you used MEM + FBS for the suspension. The composition of the respiratory epithelial lining fluid is very different than than a basal medium like the one you used. This may impact results. Have you tried these expts with simulated lung surfactant or bronchial epi fluid?

I’m proud to have our latest research published on how long #SARSCoV2 remains infectious while airborne! We studied the fundamental processes that drive the loss of viral infectivity in the aerosol phase. #COVIDisAirborne Here’s a thread going over some of the findings.

Buildings breathe. If it's smoky outside, you should be taking precautions to protect your health indoors as well as out. I walked through every possible home configuration I could think of with @Smogdr (window a/c? central a/c?) to find out what to do. heatmap.news/wildfire-smoke…

If you’re worried about #wildfire #smoke inhalation, go grab that #N95 mask you set aside on May 11. It will help…a lot. agupubs.onlinelibrary.wiley.com/share/YXFYMRK2…