Roxana Suehring
roxanaenvchem.bsky.social
Roxana Suehring
@roxanaenvchem.bsky.social
Assistant Professor for Environmental Chemistry at Toronto Metropolitan University.
My research looks at plastic additives that leach out of consumer products and contaminants in the Arctic
Reposted by Roxana Suehring
The Ford government's anti-encampment bill won't help solve the homelessness crisis. All it will do is criminalize those who are already down on their luck.

We need more supports, not more stigmatization.
Critics call out problems with encampment bill
Advocates say Ontario’s proposed encampment bill will only make the homelessness crisis worse. CTV’s Alexandra Holyk explains.
www.ctvnews.ca
May 7, 2025 at 2:32 PM
I am glad that this important study is getting media attention! The paper is available #openaccess here: pubs.acs.org/doi/10.1021/...
April 15, 2025 at 9:08 PM
Reposted by Roxana Suehring
Does chewing gum release microplastics into our bodies? A new UCLA study says yes. TMU prof. Roxana Suehring notes we must now study what types of chemicals are released and their impact on our health. More: bit.ly/4iO2jT0 @roxanaenvchem.bsky.social @torontomet.bsky.social @torontometsci.bsky.social
April 10, 2025 at 1:24 PM
Very excited to attend the book launch of "Interrupting Innovation" today. I have never had a publication -themed cake before :D.
For the book, I co-authored a chapter on why we need to think about justice questions in science education. Have a read :) fernwoodpublishing.ca/book/interru...
April 4, 2025 at 12:30 AM
I am exited about the launch of the book "interrupting innovation". My friend Brooke Filsinger, a brilliant #Mohawk scholar, and I co-authored a chapter on why we need social justice and space for #IndigenousScience in #STEM education. @torontomet.bsky.social fernwoodpublishing.ca/events/view/...
Interrupting Innovation Book Launch
Join the co-editors Melanie Panitch, Samantha Webhi, and Jessica Machado for the launch of Interrupting Innovation: Centring the Social. Featuring Dr. Eliza Chandler and Kiaras Gharabaghi.
fernwoodpublishing.ca
March 5, 2025 at 2:29 PM
I am excited to be a keynote speaker at the INEF conference 2025 in Tampa. It will be a great meeting with sessions on environmental forensic topics ranging from #wildfire forensics to fingerprinting #microplastic sources.
Abstract submissions are open: www.rsc-inef.net/inef-2025-co...
#INEF
INEF 2025 Conference Registration
Online registration for INEF 2025 is open  here , via the RSC Abstract and Registration Portal. The registration types and cost are set out below and presented in Dollars ($)
www.rsc-inef.net
February 15, 2025 at 5:55 PM
Reposted by Roxana Suehring
Grateful for the opportunity to think together with Jamie Ataria, Louis Tremblay and a diverse, outstanding group of scholars across continents and contexts pubs.acs.org/doi/10.1021/...
Towards the Sustainable Management of Chemicals and Waste: Weaving Indigenous Knowledge with Green and Sustainable Chemistry
The Ma̅ori concept of whakapapa is introduced as an opportunity to understand where and how chemical feedstocks are sourced, within a broader context of weaving Indigenous knowledge with green and sus...
pubs.acs.org
February 6, 2025 at 5:32 PM
Reposted by Roxana Suehring
New accepted paper by Trisia Farrelly @smbrander.bsky.social RICHARD THOMPSON @bcarneyalmroth.bsky.social published in @cambridgeuparchaeo.bsky.social Cambridge Prisms #Plastics

Independent Science Key to Breaking Stalemates in Global Plastics Treaty Negotiations
www.cambridge.org/core/journal...
Independent Science Key to Breaking Stalemates in Global Plastics Treaty Negotiations | Cambridge Prisms: Plastics | Cambridge Core
Independent Science Key to Breaking Stalemates in Global Plastics Treaty Negotiations
www.cambridge.org
February 3, 2025 at 5:46 PM
Reposted by Roxana Suehring
If you’re in Nain, join us for science and songs this coming week. We’re so excited to share five years of research data about plastics in Nunatsiavut, which involved over 200 people!
January 18, 2025 at 7:27 PM
Join us for the 2025 conference on environmental forensics June 23 -25 in Florida. The conference will feature interdisciplinary speakers ranging from academia to regulators to expert witnesses focussing on wildfire arson, microplastic source tracking, and PFAS.
www.rsc-inef.net
#INEF #Environment
INTERNATIONAL NETWORK OF ENVIRONMENTAL FORENSICS
The International Network of Environmental Forensics (INEF) was founded in 2008 to provide a forum for scientists, environmental consultants, regulators and lawyers to share information regarding...
www.rsc-inef.net
January 9, 2025 at 7:26 PM
Merry Christmas 🎄🎁
December 24, 2024 at 3:53 PM
Reposted by Roxana Suehring
‼️Are you a Canadian who cares about EDI in research? Did you know about what’s currently going on at the Standing Committee on Science and Research in Ottawa where the "Impact of the Criteria for Awarding Federal Funding on Research Excellence in Canada" is being studied? 🧪
I didn’t till just now 1/
December 11, 2024 at 1:39 PM
Ich hatte noch nie von MMS gehört, aber es ist echt unfassbar, dass das als "Medizin" angepriesen wird: youtu.be/ILuZOR7E8Ws?...
MMS ist GIFT! Wirklich.
YouTube video by MAITHINK X
youtu.be
December 10, 2024 at 3:14 PM
Reposted by Roxana Suehring
Funded PhD opportunity with myself and Dr Rosie Williams (ZSL).

ENDOCRINE DISRUPTION IN MARINE MAMMALS: RELATIONSHIPS BETWEEN CONTAMINANT EXPOSURE AND REPRODUCTIVE PHYSIOLOGY IN THE COMMON HARBOUR PORPOISE

www.trees-dla.ac.uk/projects/end...
Endocrine Disruption in marine mammals: relationships between contaminant exposure and reproductive physiology in the common harbour porpoise | UCL Trees
Endocrine disrupting chemicals (EDCs) can cause developmental abnormalities resulting in altered morphometrics of reproductive organs. Marine mammals are good indicators of environmental change as the...
www.trees-dla.ac.uk
December 9, 2024 at 1:55 PM
Reposted by Roxana Suehring
Was catching up with friend and talking about model selection and covariance structures (as you do). We ended up turning to @bbolker.bsky.social's fantastically useful FAQ document for mixed models here: bbolker.github.io/mixedmodels-.... If you use #Rstats and mixed models, that FAQ is your friend!
GLMM FAQ
bbolker.github.io
December 6, 2024 at 11:18 PM
Crazy
December 7, 2024 at 4:12 PM
Reposted by Roxana Suehring
this was arguably the first modern misogynist mass shooting -- the shooter had been denied admission to the engineering program, blamed the women who'd been admitted, bought a gun legally, entered the school, and proceeded to shoot only women, letting men go free and unharmed
Today, we remember the 14 women murdered on December 6, 1989, in the Montreal Massacre at École Polytechnique. Their lives were stolen by misogyny, but their names and stories remain with us.

They will never be forgotten.
December 6, 2024 at 5:23 PM
Reposted by Roxana Suehring
Why are #TFA and other #PFAS planetary boundary threat?

In a new #ZeroPM video, Ian Cousins, Hans Peter Arp and Emma Palm are interviewed by Sarah Hale to discuss their analysis on this issue.

youtu.be/NyShFTVyu2o

#planetaryboundaries
Why are TFA and other PFAS a planetary boundary threat?
YouTube video by ZeroPM - H2020
youtu.be
December 6, 2024 at 8:57 AM
Reposted by Roxana Suehring
Excited to share the first real-time atmospheric measurements of #PFAS! We measured using acetate-CIMS in Toronto and see no evidence for direct emission of PFCAs. Rather, we see most are atmospherically formed. PFCA precursors must be considered and reduced! pubs.acs.org/doi/10.1021/...
High Time Resolution Ambient Observations of Gas-Phase Perfluoroalkyl Carboxylic Acids: Implications for Atmospheric Sources
Atmospheric formation of persistent perfluoroalkyl carboxylic acids (PFCAs) is a route to global contamination, including drinking water sources. We present high time resolution measurements of C2–C6 PFCAs in ambient air made over 6 weeks each in winter and summer 2022 in Toronto, Canada. Observations were made using chemical ionization mass spectrometry with acetate ionization, with care taken to avoid system contamination. Measurements of trifluoroacetic acid (C2 PFCA) are reported at 1 min time resolution, while those for C3–C6 PFCAs are at 10 min time resolution. Variations with time and relationships to meteorology and other pollutants show evidence of secondary formation of all observed PFCAs except perfluoropropionic acid (C3 PFCA). High time resolution data allow these unique observations, allowing for improved process and source understanding moving forward. Mixing ratios of TFA were larger than predicted from models that describe TFA formation from known precursors, indicating additional atmospheric sources of this molecule have yet to be identified.
pubs.acs.org
November 26, 2024 at 2:37 PM
Reposted by Roxana Suehring
Help us connect researchers addressing chemical pollution. Retweet and please join the network!
November 19, 2024 at 9:57 AM
We really need to rethink scientific publishing!
November 24, 2024 at 5:13 PM
Reposted by Roxana Suehring
Waste management won't solve the plastics problem!

www.nature.com/articles/d41...
Waste management won’t solve the plastics problem — we need to cut consumption
Global inventory of plastic emissions.
www.nature.com
November 19, 2024 at 4:41 PM
Reposted by Roxana Suehring
Bill McKibben: “It’s hard to imagine a clearer example of greenwashing"

www.theguardian.com/environment/...
Five firms in plastic pollution alliance ‘made 1,000 times more plastic than they cleaned up’
Five oil and chemical companies which promised to divert plastic from environment accused of producing 132m tonnes of it
www.theguardian.com
November 21, 2024 at 11:53 AM