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Eugene
@datastory@mstdn.ca  ·  activity timestamp 4 days ago

💧 In my geochemical research, I often go beyond pure PHREEQC and use the RedModRphree package in R.
It’s a powerful bridge between thermodynamic modeling and data analysis — allowing Pourbaix (Eh–pH) diagrams to be computed for complex, multicomponent systems with a focus on a specific element.

Here are examples of modeled speciation diagrams for vanadium, lead, and zinc, based on the same high mineralized water sample composition.
They clearly illustrate how each element behaves under changing redox and pH conditions — from soluble oxyanions to sparingly soluble solid phases.

#Geochemistry #Rstats #PHREEQC #DataScience #EnvironmentalChemistry #Hydrogeology #Redox #PourbaixDiagram #Thermodynamics #OpenScience #RedModRphree

Pourbaix (Eh–pH) diagrams generated with RedModRphree for V.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for V.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for V.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Pb.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Pb.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Pb.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Zn.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Zn.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Zn.
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Eugene
@datastory@mstdn.ca  ·  activity timestamp 4 days ago

💧 In my geochemical research, I often go beyond pure PHREEQC and use the RedModRphree package in R.
It’s a powerful bridge between thermodynamic modeling and data analysis — allowing Pourbaix (Eh–pH) diagrams to be computed for complex, multicomponent systems with a focus on a specific element.

Here are examples of modeled speciation diagrams for vanadium, lead, and zinc, based on the same high mineralized water sample composition.
They clearly illustrate how each element behaves under changing redox and pH conditions — from soluble oxyanions to sparingly soluble solid phases.

#Geochemistry #Rstats #PHREEQC #DataScience #EnvironmentalChemistry #Hydrogeology #Redox #PourbaixDiagram #Thermodynamics #OpenScience #RedModRphree

Pourbaix (Eh–pH) diagrams generated with RedModRphree for V.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for V.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for V.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Pb.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Pb.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Pb.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Zn.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Zn.
Pourbaix (Eh–pH) diagrams generated with RedModRphree for Zn.
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informapirata ⁂ :privacypride: boosted
fbusc
@quantumquia@poliversity.it  ·  activity timestamp 7 days ago

È divertentissimo leggere E.T. Jaynes, in particolare i suoi ultimi lavori. Questo passaggio è da "The Gibbs Paradox". Si può scaricare qui.

There is a school of thought which militantly rejects all attempts to point out the close relation between entropy and information, claiming that such considerations have nothing to do with energy; or even that they would make entropy subjective and it could therefore have nothing to do with experimental facts at all. We would observe, however, that the number of fish that you can catch is an objective experimental fact; yet it depends on how much subjective information you have about the behavior of fish.

Traduzione in italiano:

Esiste una corrente di pensiero che respinge con forza ogni tentativo di evidenziare la stretta relazione tra entropia e informazione, sostenendo che tali considerazioni non abbiano nulla a che fare con l’energia; o persino che renderebbero l’entropia soggettiva, e che quindi non potrebbe avere alcun legame con i fatti sperimentali. Osserviamo, tuttavia, che il numero di pesci che si possono catturare è un fatto sperimentale oggettivo; eppure dipende da quanta informazione soggettiva si possiede sul comportamento dei pesci.

#SecondLaw #SecondaLegge #Jaynes #Entropy #Fisica #Termodinamica #Thermodynamics

@fisica
@scienze

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fbusc
@quantumquia@poliversity.it  ·  activity timestamp 7 days ago

È divertentissimo leggere E.T. Jaynes, in particolare i suoi ultimi lavori. Questo passaggio è da "The Gibbs Paradox". Si può scaricare qui.

There is a school of thought which militantly rejects all attempts to point out the close relation between entropy and information, claiming that such considerations have nothing to do with energy; or even that they would make entropy subjective and it could therefore have nothing to do with experimental facts at all. We would observe, however, that the number of fish that you can catch is an objective experimental fact; yet it depends on how much subjective information you have about the behavior of fish.

Traduzione in italiano:

Esiste una corrente di pensiero che respinge con forza ogni tentativo di evidenziare la stretta relazione tra entropia e informazione, sostenendo che tali considerazioni non abbiano nulla a che fare con l’energia; o persino che renderebbero l’entropia soggettiva, e che quindi non potrebbe avere alcun legame con i fatti sperimentali. Osserviamo, tuttavia, che il numero di pesci che si possono catturare è un fatto sperimentale oggettivo; eppure dipende da quanta informazione soggettiva si possiede sul comportamento dei pesci.

#SecondLaw #SecondaLegge #Jaynes #Entropy #Fisica #Termodinamica #Thermodynamics

@fisica
@scienze

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