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Posts by Bill Arnold

Two new faculty openings at U. Minnesota 🧪

Assist. Prof. in Climate Science
hr.myu.umn.edu/jobs/ext/372...
Questions: Tim Griffis, tgriffis@umn.edu

Assist. Prof. in Soil Physics / Ecohydrology / Hydropedology
hr.myu.umn.edu/jobs/ext/372...
Questions: David Mulla, mulla003@umn.edu

Due March 13

2 months ago 6 7 0 0
Promotional graphic with text. "Press Release: Environmental Health Perspectives joins the ACS Publications portfolio"

Promotional graphic with text. "Press Release: Environmental Health Perspectives joins the ACS Publications portfolio"

We are proud to announce that Environmental Health Perspectives (EHP), a globally respected journal with a rich legacy as a premiere source for the environmental health sciences community, has joined the ACS Publications portfolio.

Read our announcement: buff.ly/Tc1m9Xp

2 months ago 3 3 0 0
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Congestion pricing improved air quality in NYC and suburbs | Cornell Chronicle Cornell researchers tallied the environmental benefits of New York City’s congestion pricing program and found air pollution dropped by 22% in Manhattan, with additional declines across the city’s fiv...

NYC’s congestion pricing cleaned the air. This is also what happened when EZ-Pass was put in place in NJ.

4 months ago 224 55 1 11
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Safe Water Is Rapidly Becoming a Private Good in the United States This publication is Open Access under the license indicated. Learn More

Safe Water Is Rapidly Becoming a Private Good in the United States | Environmental Science & Technology pubs.acs.org/doi/10.1021/...

4 months ago 2 0 0 0

A deep dive on how chemical structure affects photochemical reactivity and defluorination pubs.acs.org/doi/10.1021/... Celebrating 25 years of photochemistry with @krismcneill.bsky.social and nearly 10 if NMR with @pomerantz.bsky.social @envirosci.acspublications.org

5 months ago 5 4 0 0
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15 essential books to better understand climate change Professors at universities and colleges across the state say one of the best ways to understand climate change is simple: reading.

15 essential books to better understand climate change www.mprnews.org/story/2025/0...

9 months ago 4 0 0 0
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EPA eliminates research and development office, begins layoffs The Environmental Protection Agency said Friday it is eliminating its research and development arm and reducing agency staff by thousands of employees.

The EPA has eliminated its research division, which for decades has provided the science behind regulations on clean air, clean water, and toxic chemicals.

The US can afford to monitor, research, and regulate the impacts of industries on human and environmental health. We are just choosing not to.

9 months ago 2098 1048 140 94
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We are looking for a PhD student for a project on chloronitramide in drinking water. Please spread the word!

jobs.ethz.ch/job/view/JOP...

9 months ago 8 12 1 0
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Circularity and Sustainability: A Course that Advances Critical Thinking and Teamwork via Art, Community, and Policy | Environmental Engineering Science An opportunity exists for circular resource use, decreasing environmental impact and economic risk and at the same time enhancing biodiversity and global standards of living. When viewed from the pers...

What happens when engineers and artists team up? Students (STEM, policy) learn new perspectives on issues and solutions. @aeesprofs.bsky.social doi.org/10.1089/ees.... #Openaccess

9 months ago 2 0 0 0
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'Forever chemical' TFA found in all but one of tested UK rivers The long-term impact of the chemical on human health is still unclear and being researched.

www.bbc.co.uk/news/article...

10 months ago 13 5 0 1
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Fulbright Foreign Scholarship Board Resignation Statement Effective immediately, members of the Congressionally mandated Fulbright Foreign Scholarship Board voted overwhelmingly to resign from the board, rather than endorse unprecedented actions that we beli...

The entire board tasked with overseeing the State Department's Fulbright Program has resigned — claiming political interference from the Trump admin.
 
The Board voted "overwhelmingly" to resign "rather than endorse unprecedented actions … impermissible under the law." substack.com/home/post/p-...

10 months ago 1555 550 41 50
Sign-on campaign: Scientists’ statement on the chemical definition of PFASs | IPCP

Sign-on campaign: Preserving Scientific Integrity in the PFAS Definition. Scientists raise concerns about ongoing efforts to redefine PFAS and potentially exclude certain fluorinated chemical subgroups from the widely accepted 2021 OECD definition. www.ipcp.ch/news/sign-on...

10 months ago 4 8 1 2

Here's how we know this EO is a SNEAKY sinister thing:

1. When Trump wants people to know about something, it is very public.
2. It was released on the Friday evening of a holiday weekend
3. Cloaked under piles of sciencey language
4. First thing this morning, loud and proud: RFK's vax rollback

10 months ago 134 70 2 1

Well deserved!!

10 months ago 2 0 1 0
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Influence of Cleaning on Indoor Air Concentrations of Volatile and Semivolatile Organic Compounds in Residences Cleaning activities can affect indoor air composition long after the cleaning is completed. Utilizing data from detailed observational monitoring campaigns, conducted over 21 weeks, we explore the influence of cleaning activities in two normally occupied, single-family houses. To study emissions and chemistry, we quantified more than 200 volatile organic compounds (VOCs) using a proton-transfer reaction time-of-flight mass spectrometer and 52 semivolatile organic compounds (SVOCs) using a semivolatile thermal-desorption gas chromatograph. During regular professional home cleaning, we observed postcleaning concentration enhancements in ∼60% of measured VOCs and ∼80% of measured SVOCs. Most of these concentration enhancements were not clearly linked to either primary emission from cleaning products or secondary formation through reactive chemistry. Instead, we infer that shifts in the sorptive properties of indoor surfaces account for most of these observations. Cleaning-associated enhancements mostly ebbed within a few hours, with some VOCs and lower-volatility SVOCs persisting more than 5 h, longer than would be expected for removal of inert species by ventilation. The use of carpet cleaner was associated with direct emission of 2-butoxyethanol, which persisted at elevated concentrations for days after the initial event. Home cleaning is potentially relevant for the health of professional cleaners and residents.

Cleaning can be messy.

Cleaning indoor spaces can enhance the release of a chemicals with a range of volatility. Most persist for up to five hours in home testing.

While not an excuse to not clean the bathroom, research has implications for cleaning professionals.

pubs.acs.org/doi/full/10....

11 months ago 32 7 1 3
Home | Save NSF

✅ ACTION ITEM ✅

The National Science Foundation is under attack.

Trump’s budget is moving to dismantle one of the great engines of U.S. innovation, education, and discovery.

The fight to save NSF is on—and now there’s a new home base to join the front lines (🧵 1/3):

www.savensf.com

11 months ago 181 92 5 7
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🚨 EPA's Clean Air Scientific Advisory Committee (#CASAC) is seeking nominations!

Experts in #air quality, #epidemiology, #toxicology, #riskassessment, and more are encouraged to apply.

🗓️ Deadline: June 2, 2025
🔗 casac.epa.gov
📧 Any questions please contact: yeow.aaron@epa.gov

#AEESP #EPA

11 months ago 0 1 0 0
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NSF halts grant awards while staff do second review Action comes after DOGE team arrives at science agency

🧪

www.science.org/content/arti...

1 year ago 44 42 0 8
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I was investigating PFAS. Then a doctor told me to put it in my eyes. Facing a painful and distracting case of dry eye, a reporter went looking for treatments. What she found was surprising.

Fluorochemical eyedrops!

www.startribune.com/i-was-invest...

1 year ago 5 1 0 0
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Group Leader in Experimental Atmospheric Chemistry

We are searching for a Group Leader in Experimental Atmospheric Chemistry! You can find details in the link; please share with qualified colleagues! jobs.ethz.ch/job/view/JOP...

1 year ago 17 11 1 2
Podcast | Three Rivers Park District Toggle NavigationToggle SearchFind Us on FacebookFind Us on FacebookFind us on X (formerly Twitter)Find Us on LinkedInFind Us on YouTubeFind U...

Check out the Three Rivers Park District's Wandering Naturalist podcasts on neonicotinoids (epsidoes 237-239) www.threeriversparks.org/podcast

Episode 239 is about our work on neonics in MN waters.

1 year ago 1 0 0 0

This article does a great job describing the lives of young American scientists:

“You roll up your sleeves, try to make or discover something useful and then let the scientific community try to punch holes in your work to make sure that it’s sound”

1 year ago 89 34 1 0

People have no understanding of the enormous avoided health costs that EPA has made possible. The Clean Air Act alone has paid for all of EPA's costs by a factor of nearly 100.

1 year ago 59 18 2 1

Seriously, it’s hard to overstate the importance of the work these EPA scientists do and how devastating their firing would be to public health. So much of what we know about #PFAS, for example, and many of the methods used to detect these toxic chemicals are thanks to these researchers’ work.

1 year ago 11 5 0 0
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Trump Administration Aims to Eliminate E.P.A.’s Scientific Research Arm (Gift Article) More than 1,000 chemists, biologists and other scientists could be laid off under a plan to dismantle the Office of Research and Development.

The air quality and health models I have used throughout my career have emerged from EPA’s Office of Research and Development. Shuttering it would be a devastating loss.
www.nytimes.com/2025/03/17/c...

1 year ago 9 6 0 2
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Welcome to the Bluesky account for Stand Up for Science 2025!

Keep an eye on this space for updates, event information, and ways to get involved. We can't wait to see everyone #standupforscience2025 on March 7th, both in DC and locations nationwide!

#scienceforall #sciencenotsilence

1 year ago 11479 5423 291 668

@aeesprofs.bsky.social is now on BlueSky!

1 year ago 4 3 0 0
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Opinion | American Science is Under Attack (Gift Article) The Trump administration hobbles research and endangers the public health.

An absolutely scorching OpEd by Harold Varmus, Nobel laureate, on Trump's destruction of the vaunted US scientific & biomedical enterprise & on Trump's kooky picks to lead the US health & science agencies

Gift link to share far & wide

www.nytimes.com/2025/02/14/o...

1 year ago 346 215 7 12
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Desirée Plata: Chemist, oceanographer, engineer, entrepreneur MIT professor is passionate about reducing the chemical industry’s impact on the environment and human health

MIT professor Desirée Plata designs novel materials to tackle challenging environmental problems and has cofounded two climate- and energy-related start-ups: Moxair and Nth Cycle. cen.acs.org/people/profi... #chemsky🧪 #scinews

1 year ago 36 9 0 0
Map of the world color-coded by the percent of HgOH going on to make HG(II) compounds. The Schrodinger equation is depicted below Africa.

Map of the world color-coded by the percent of HgOH going on to make HG(II) compounds. The Schrodinger equation is depicted below Africa.

BrHgOH molecule on a layer of water molecules (meant to represent the top layer of the surface of ice).

BrHgOH molecule on a layer of water molecules (meant to represent the top layer of the surface of ice).

OH radical donating a hydrogen bond to acetaldehyde (ethanal).

OH radical donating a hydrogen bond to acetaldehyde (ethanal).

I’m looking for new PhD students wanting to use computational chemistry to study atmospheric reactions. Topics: Hg redox reactions at surfaces. AI to study how hydrogen bonds (R=O--HO• and RO(H)--HO) affects kinetics of H-abstraction.
See www.esf.edu/faculty/dibble or tsdibble@esf.edu

1 year ago 10 16 3 0