Mineral systems and thermodynamic stability of arsenic minerals in the environment

Research output

Abstract

Arsenic is widely distributed in the environment. The paper presents systematized data published about the thermodynamics of some relatively common arsenic oxysalts, which are formed in the weathering zone of the arsenide and sulfide ores, and determines approaches to quantitative physicochemical modeling of their formation conditions. The interpretations are summarized on the Eh–pH diagrams, synthesized from equilibrium calculations, and reported geologic occurrences. The most recent thermodynamic data available were used for the construction of diagrams from reactions which are balanced equations of Eh–pH relationships among species which are thermodynamically stable within the ranges of oxidation potential and pH considered for each reaction. The Eh–pH diagrams of systems, containing As and Fe, Cu, Pb, Co, Ni, Ca, were calculated and constructed using the Geochemist’s Workbench (GMB 9.0) software package. Eh–pH stability relationships have been determined for some widespread arsenic oxysalts (scorodite, mimetite, erythrite, olivenite, annabergite, beudantite, conichalcite, adamite, duftite) and in order to interpret conditions of formation of these minerals and to compare their geologic stabilities of ore deposits. The understanding of mechanisms of arsenic behavior in the near-surface conditions is one of actual problems of modern mineralogy and geochemistry and it is very important for the solving of some environmental problems.
Original languageEnglish
Title of host publicationLecture Notes in Earth System Sciences
EditorsOlga V. Frank-Kamenetskaya, Dmitry Yu. Vlasov, Elena G. Panova, Sofia N. Lessovaia
Place of PublicationCham
PublisherSpringer Nature
Pages259-276
Number of pages18
ISBN (Electronic)9783030216146
ISBN (Print)9783030216139
DOIs
Publication statusPublished - 1 Jan 2020
EventVI International Symposium "Biogenic-abiogenic interactions in natural and anthropogenic systems" devoted to the 150th anniversary of the Saint Petersburg Naturalists Society - СПбГУ, Санкт-Петербург
Duration: 24 Sep 201827 Sep 2018
Conference number: VI

Publication series

NameLecture Notes in Earth System Sciences
ISSN (Print)2193-8571
ISSN (Electronic)2193-858X

Conference

ConferenceVI International Symposium "Biogenic-abiogenic interactions in natural and anthropogenic systems" devoted to the 150th anniversary of the Saint Petersburg Naturalists Society
CountryRussian Federation
CityСанкт-Петербург
Period24/09/1827/09/18

Scopus subject areas

  • Computers in Earth Sciences
  • Earth and Planetary Sciences(all)

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