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

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

doi:10.1007/s11869-019-00725-5

Cited by 7 publications

(4 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although majority of groundwater samples from Srivastava et al suggested CrO 4 2– to be the dominant Cr species, Cr(III) could also be present significantly in samples from Noraiyakhera and Rania in Kanpur. A possible explanation for the presence of Cr(III) in these studies might be the reduction of Cr(VI) mediated by humic substances , Furthermore, a recent simulation-based analysis of aqueous chemistry of airborne hexavalent chromium particles, originating from various industrial activities, also indicated CrO 4 2– as the most stable form of Cr(VI) at the prevalent pH, along with possible reduction of Cr(VI) to Cr(III) due to presence of reducing agents like Fe(II). , …”

Section: Resultsmentioning

confidence: 66%

“…2− as the most stable form of Cr(VI) at the prevalent pH, along with possible reduction of Cr(VI) to Cr(III) due to presence of reducing agents like Fe(II). 49,50 The presence of Cr in groundwater could be attributed to leaching from COPR dump due to either dissolution of some Cr-bearing solid phases 7,24 or desorption of Cr(VI) present in the COPR. 31 Calculated saturation indices for many groundwater samples indicate Cr(VI) and Cr(III) phases, Cr(VI)jarosite (s) , BaCrO 4(s) , Cr(OH) 3(s) , and Cr 2 O 3(s) , as either supersaturated or at-saturation (Figure 4).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Processes Governing Chromium Contamination of Groundwater and Soil from a Chromium Waste Source

Bhattacharya

Shriwastav

Bhole

et al. 2019

ACS Earth Space Chem.

View full text Add to dashboard Cite

Chromium (Cr) contamination of natural resources from unregulated disposal of pretanning industrial waste, chromite ore processing residue (COPR), is a serious environmental concern, especially in developing countries. Although there have been studies on COPR characterization, the fate and transport of chromium emanating from COPR remains poorly understood. In this study, processes governing Cr contamination in groundwater and soil near known COPR disposal sites were investigated. Field sampling of groundwater, irrigated soil, and COPR was conducted near Kanpur (India) to identify the extent and forms of chromium contamination. Both dissolved and suspended fractions of groundwater were analyzed to evaluate the presence of any Cr-containing colloids. At certain locations with elevated Cr levels, the saturation state of sampled groundwater was evaluated to be near equilibrium with respect to BaCrO 4(s) through speciation modeling of wet chemical data. Colloidal forms of Cr, such as BaCrO 4(s) or as Cr adsorbed on other non-Cr containing phases, were suggested through measured differences in total and dissolved Cr concentrations and SEM-EDS evidence of Ba and Cr on filtrate residues. As BaCrO 4(s) was not detected in COPR, the presence of these colloids in groundwater could be indicative of secondary precipitation of Cr upon interaction with Ba present in the subsurface. Rapid formation of colloidal BaCrO 4(s) was also supported through controlled batch experiments with Cr(VI)-and Ba-spiked ultrapure water and groundwater. These results indicate the importance of secondary precipitation of colloidal BaCrO 4(s) in determining eventual Cr(VI) solubility in aquifers impacted by Cr originating from COPR dissolution.

show abstract

Section: Resultsmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Processes Governing Chromium Contamination of Groundwater and Soil from a Chromium Waste Source

Bhattacharya

Shriwastav

Bhole

et al. 2019

ACS Earth Space Chem.

View full text Add to dashboard Cite

show abstract

“…Soluble Cr (VI) is known to enter the bloodstream and is later excreted or converted to Cr(III) in the bloodstream 13 . Recent works are being tailored to investigate the reactivity of Cr in the atmosphere to better understand its speciation 14 , 15 .…”

Section: Introductionmentioning

confidence: 99%

“…A model of Cr speciation in deliquesced particles (pH ~ 4) was developed by Konakbayeva et al to provide more insight into the soluble and insoluble forms of Cr atmospheric particles 14 . Simulation results indicated that the insoluble Cr(III) compound, Cr 2 (SO 4 ) 3(s) , was the dominant form of Cr(III) at pH ~ 4, and the overall conversion direction was identified as from Cr(VI) to Cr(III).…”

mentioning

confidence: 99%

Impact of volatile organic compounds on chromium containing atmospheric particulate: insights from molecular dynamics simulations

Shah

Karibayev

Adotey

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

The effect of volatile organic compounds (VOCs) on chromium-containing atmospheric particles remains obscured because of difficulties in experimental measurements. Moreover, several ambiguities exist in the literature related to accurate measurements of atmospheric chromium concentration to evaluate its toxicity. We investigated the interaction energies and diffusivity for several VOCs in chromium (III)-containing atmospheric particles using classical molecular dynamics simulations. We analyzed xylene, toluene, ascorbic acid, carbon tetrachloride, styrene, methyl ethyl ketone, naphthalene, and anthracene in Cr(III) solutions, with and without air, to compare their effects on solution chemistry. The interaction energy between Cr(III) and water changed from 48 to 180% for different VOCs, with the highest change with anthracene and the lowest change with naphthalene. The results revealed no direct interactions between Cr(III) particles and the analyzed volatile organic compounds, except ascorbic acid. Interactions of Cr(III) and ascorbic acid differ significantly between the solution phase and the particulate phase. The diffusion of Cr(III) and all the VOCs also were observed in a similar order of magnitude (~ 10−5 cm2/s). The results can further assist in exploring the variation in chromium chemistry and reaction rates in the atmospheric particles in the presence of VOCs.

show abstract

Environmental Carriers for Metal Nanoparticles: Transport, Fate, and Eco-risks

Liu,

Ying,

Jiang

et al. 2023

Reviews Env.Contamination (formerly:Residue Reviews)

View full text Add to dashboard Cite

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

Cited by 7 publications

References 31 publications

Processes Governing Chromium Contamination of Groundwater and Soil from a Chromium Waste Source

Processes Governing Chromium Contamination of Groundwater and Soil from a Chromium Waste Source

Impact of volatile organic compounds on chromium containing atmospheric particulate: insights from molecular dynamics simulations

Environmental Carriers for Metal Nanoparticles: Transport, Fate, and Eco-risks

Contact Info

Product

Resources

About