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 | |
| Publication status | Published - Sep 15 2019 |
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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
Cite this
A conceptual model to understand the soluble and insoluble Cr species in deliquesced particles. / Konakbayeva, Dinara; Adotey, Enoch Kwasi; Torkmahalleh, Mehdi; Fyrillas, Marios; 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
}
TY - JOUR
T1 - A conceptual model to understand the soluble and insoluble Cr species in deliquesced particles
AU - Konakbayeva, Dinara
AU - Adotey, Enoch Kwasi
AU - Torkmahalleh, Mehdi
AU - Fyrillas, Marios
AU - Zinetullina, Altyngul
AU - Rule, Ana M.
AU - Hopke, Philip K.
PY - 2019/9/15
Y1 - 2019/9/15
N2 - 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.
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.
KW - Atmospheric PM
KW - Conceptual model
KW - Deliquescence
KW - Insoluble and soluble Cr
UR - http://www.scopus.com/inward/record.url?scp=85070381611&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070381611&partnerID=8YFLogxK
U2 - 10.1007/s11869-019-00725-5
DO - 10.1007/s11869-019-00725-5
M3 - Article
VL - 12
SP - 1091
EP - 1102
JO - Air Quality, Atmosphere and Health
JF - Air Quality, Atmosphere and Health
SN - 1873-9318
IS - 9
ER -