#environmentaltoxicology — Public Fediverse posts

A critique of the linear non-threshold model used by the U.S. EPA to assess cancer risk:

https://www.acsh.org/news/2026/04/28/assessing-cancer-risk-its-time-follow-science-50084

As noted in the article, this is a politically contentious topic. The author has had a long career in both the public and private sector, and does not appear to have a political agenda.

#Toxicology #RiskAssessment #Cancer #Environment #EnvironmentalToxicology #USEPA

@mrillig

You may thank us ✌️🪱✌️

"Crucially, both field and laboratory data demonstrated a significant reduction in particle size in casts compared to soil (6.48% and 19.8%, respectively), supporting the potential earthworm effects on MP (microplastic) mechanical attrition. Polymer compositions in casts mirrored those in soils, exhibiting a nonselective and passive ingestion pathway. Beyond physical transport, the formation of field biogenic polymer aggregates facilitated chemical aging of MPs, as evidenced by elevated oxidation indices. This process was likely accelerated by the enrichment of plastic-degrading microbial taxa (e.g., Flavobacterium) within casts, which exhibited up to a 35.6-fold increase in relative abundance."

#Earthworms #Microplastics #EcosystemEngineers #SoilBiology #SoilEcology #EnvironmentalToxicology

@mrillig

You may thank us ✌️🪱✌️

"Crucially, both field and laboratory data demonstrated a significant reduction in particle size in casts compared to soil (6.48% and 19.8%, respectively), supporting the potential earthworm effects on MP (microplastic) mechanical attrition. Polymer compositions in casts mirrored those in soils, exhibiting a nonselective and passive ingestion pathway. Beyond physical transport, the formation of field biogenic polymer aggregates facilitated chemical aging of MPs, as evidenced by elevated oxidation indices. This process was likely accelerated by the enrichment of plastic-degrading microbial taxa (e.g., Flavobacterium) within casts, which exhibited up to a 35.6-fold increase in relative abundance."

#Earthworms #Microplastics #EcosystemEngineers #SoilBiology #SoilEcology #EnvironmentalToxicology

@mrillig

You may thank us ✌️🪱✌️

"Crucially, both field and laboratory data demonstrated a significant reduction in particle size in casts compared to soil (6.48% and 19.8%, respectively), supporting the potential earthworm effects on MP (microplastic) mechanical attrition. Polymer compositions in casts mirrored those in soils, exhibiting a nonselective and passive ingestion pathway. Beyond physical transport, the formation of field biogenic polymer aggregates facilitated chemical aging of MPs, as evidenced by elevated oxidation indices. This process was likely accelerated by the enrichment of plastic-degrading microbial taxa (e.g., Flavobacterium) within casts, which exhibited up to a 35.6-fold increase in relative abundance."

#Earthworms #Microplastics #EcosystemEngineers #SoilBiology #SoilEcology #EnvironmentalToxicology

@mrillig

You may thank us ✌️🪱✌️

"Crucially, both field and laboratory data demonstrated a significant reduction in particle size in casts compared to soil (6.48% and 19.8%, respectively), supporting the potential earthworm effects on MP (microplastic) mechanical attrition. Polymer compositions in casts mirrored those in soils, exhibiting a nonselective and passive ingestion pathway. Beyond physical transport, the formation of field biogenic polymer aggregates facilitated chemical aging of MPs, as evidenced by elevated oxidation indices. This process was likely accelerated by the enrichment of plastic-degrading microbial taxa (e.g., Flavobacterium) within casts, which exhibited up to a 35.6-fold increase in relative abundance."

#Earthworms #Microplastics #EcosystemEngineers #SoilBiology #SoilEcology #EnvironmentalToxicology

@mrillig

You may thank us ✌️🪱✌️

"Crucially, both field and laboratory data demonstrated a significant reduction in particle size in casts compared to soil (6.48% and 19.8%, respectively), supporting the potential earthworm effects on MP (microplastic) mechanical attrition. Polymer compositions in casts mirrored those in soils, exhibiting a nonselective and passive ingestion pathway. Beyond physical transport, the formation of field biogenic polymer aggregates facilitated chemical aging of MPs, as evidenced by elevated oxidation indices. This process was likely accelerated by the enrichment of plastic-degrading microbial taxa (e.g., Flavobacterium) within casts, which exhibited up to a 35.6-fold increase in relative abundance."

#Earthworms #Microplastics #EcosystemEngineers #SoilBiology #SoilEcology #EnvironmentalToxicology

So excited that @alieward got a #toxicologist on the show! We need to talk more about these questions. People need to know this stuff!
#chemcials
#toxicChemicals
#Plastics
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RT @Ologies
#EnvironmentalToxicology w/ Dr. @kimkgarrett brings you ol’ timey poisons, industrial accidents, trench coats, PFAS, phthalates, vaping, rainbowy rivers, White Noise, candle addictions + the OH train derailment. We cover so much (contaminated) ground! htt…
https://twitter.com/Ologies/status/1628662182073475079

My better #introduction -

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