Discover and read the best of Twitter Threads about #arsenic

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#Cuivre épisode 2 c'est parti.
Rappel du premier épisode : threadreaderapp.com/thread/1116041… après un peu de chimie et de #reglementation on va rentrer dans le vif du sujet #toxicologie.
D’ailleurs, je m’aperçois que je suis allé un peu vite dans ma démarche.
Petit rappel sur l’évaluation des risques :
Préliminaire, différence entre dangers et risques, je la fais tout le temps celle là mais il faut bien comprendre. #danger : propriété intrinsèque d’une substance, #risque : probabilité d’être exposé à cette substance.
Donc risque = Danger x exposition.
Ceci étant dit : la démarche d’évaluation des risques :
1 – Identification des dangers (par les études, publications, etc…)
2 – Caractérisation du danger : dérivations des doses de références toxicologiques
Read 35 tweets
Though I am really glad that #arsenic contamination of #groundwater in India, and specially #WestBengal is getting the attention it deserves, there is a major issue that needs wider discussion.
There is a simplistic argument that arsenic naturally occurs in the #Gangetic belt, the author uses the term “#geological curse”. If this is the case, why is heavy #arsenic contamination being reported from #Jharkhand and #Chattisgarh in Central India?
A possible answer to that may be traced to this MIT paper that was published in @NatureGeosci on #anthropogenic influence on #groundwater #arsenic contamination in #Bangladesh nature.com/articles/ngeo6…
Read 8 tweets

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