A conceptual model to understand the soluble and insoluble Cr species in deliquesced particles

Dinara Konakbayeva; Enoch Kwasi Adotey; Mehdi Amouei Torkmahalleh; Marios M. Fyrillas; Altyngul Zinetullina; Ana M. Rule; Philip K. Hopke

doi:10.1007/s11869-019-00725-5

A conceptual model to understand the soluble and insoluble Cr species in deliquesced particles

Dinara Konakbayeva, Enoch Kwasi Adotey, Mehdi Amouei Torkmahalleh, Marios M. Fyrillas, Altyngul Zinetullina, Ana M. Rule, Philip K. Hopke

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Trivalent chromium is a trace nutrient essential to human beings while hexavalent chromium is a known carcinogen and was among the 18 core hazardous air pollutants defined in 2004 by the US EPA. A new conceptual model of Cr speciation in deliquesced particles (pH 4) has been developed. The model provides new information on the soluble and insoluble forms of Cr in atmospheric PM. The dominant form of Cr(VI) in the solution was found to be Cr₂O₇ ²⁻. CrO₄ ²⁻ was produced by the dissolution of Na₂CrO₄(s) and K₂CrO₄(s) available in the solid core, but a considerable portion of the CrO₄ ²⁻ precipitated as (NH₄)₂CrO₄(s), CaCrO₄(s), BaCrO₄(s), and PbCrO₄(s). Cr(OH)₃ was found to be soluble, and the insoluble form of Cr(III) was Cr₂(SO₄)₃. Conversion of Cr(VI) to Cr(III) was higher than the conversion of Cr(III) to Cr(VI). The simulation results agree with the field measurements near Cr industries.

Original language	English
Pages (from-to)	1091-1102
Number of pages	12
Journal	Air Quality, Atmosphere and Health
Volume	12
Issue number	9
DOIs	https://doi.org/10.1007/s11869-019-00725-5
Publication status	Published - Sep 15 2019

Keywords

Atmospheric PM
Conceptual model
Deliquescence
Insoluble and soluble Cr

ASJC Scopus subject areas

Pollution
Atmospheric Science
Management, Monitoring, Policy and Law
Health, Toxicology and Mutagenesis

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10.1007/s11869-019-00725-5

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A conceptual model to understand the soluble and insoluble Cr species in deliquesced particles. / Konakbayeva, Dinara; Adotey, Enoch Kwasi; Amouei Torkmahalleh, Mehdi; Fyrillas, Marios M.; Zinetullina, Altyngul; Rule, Ana M.; Hopke, Philip K.

In: Air Quality, Atmosphere and Health, Vol. 12, No. 9, 15.09.2019, p. 1091-1102.

Research output: Contribution to journal › Article › peer-review

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abstract = "Trivalent chromium is a trace nutrient essential to human beings while hexavalent chromium is a known carcinogen and was among the 18 core hazardous air pollutants defined in 2004 by the US EPA. A new conceptual model of Cr speciation in deliquesced particles (pH 4) has been developed. The model provides new information on the soluble and insoluble forms of Cr in atmospheric PM. The dominant form of Cr(VI) in the solution was found to be Cr2O7 2−. CrO4 2− was produced by the dissolution of Na2CrO4(s) and K2CrO4(s) available in the solid core, but a considerable portion of the CrO4 2− precipitated as (NH4)2CrO4(s), CaCrO4(s), BaCrO4(s), and PbCrO4(s). Cr(OH)3 was found to be soluble, and the insoluble form of Cr(III) was Cr2(SO4)3. Conversion of Cr(VI) to Cr(III) was higher than the conversion of Cr(III) to Cr(VI). The simulation results agree with the field measurements near Cr industries.",

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AB - Trivalent chromium is a trace nutrient essential to human beings while hexavalent chromium is a known carcinogen and was among the 18 core hazardous air pollutants defined in 2004 by the US EPA. A new conceptual model of Cr speciation in deliquesced particles (pH 4) has been developed. The model provides new information on the soluble and insoluble forms of Cr in atmospheric PM. The dominant form of Cr(VI) in the solution was found to be Cr2O7 2−. CrO4 2− was produced by the dissolution of Na2CrO4(s) and K2CrO4(s) available in the solid core, but a considerable portion of the CrO4 2− precipitated as (NH4)2CrO4(s), CaCrO4(s), BaCrO4(s), and PbCrO4(s). Cr(OH)3 was found to be soluble, and the insoluble form of Cr(III) was Cr2(SO4)3. Conversion of Cr(VI) to Cr(III) was higher than the conversion of Cr(III) to Cr(VI). The simulation results agree with the field measurements near Cr industries.

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A conceptual model to understand the soluble and insoluble Cr species in deliquesced particles

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