Ice nucleation activity of silicates and aluminosilicates in pure water and aqueous solutions. Part 2 – Quartz and amorphous silica

Kumar, Anand; Marcolli, Claudia; Peter, Thomas

doi:10.5194/acp-2018-1020

Cited by 5 publications

(10 citation statements)

References 115 publications

(209 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A lattice match exists between hexagonal ice and β-tridymite and cubic ice and β-cristobalite, but these polymorphs are not stable at low temperatures, and we do not expect them to be present in our samples . The freezing ability of another silica polymorph, quartz, has been examined previously and has been observed to be highly variable, with the warmest IN activity attributed to surface roughening and milling. , However, we suspect that the silica polymorphs in the Santiaguito and SHV ashes do not contribute significantly to the IN behavior observed in this work. Unmilled quartz has been observed to be a weaker ice nucleant than plagioclase feldspars, ,, and our ash samples were not milled or ground.…”

Section: Resultsmentioning

confidence: 53%

“…The freezing ability of another silica polymorph, quartz, has been examined previously and has been observed to be highly variable, with the warmest IN activity attributed to surface roughening and milling. , However, we suspect that the silica polymorphs in the Santiaguito and SHV ashes do not contribute significantly to the IN behavior observed in this work. Unmilled quartz has been observed to be a weaker ice nucleant than plagioclase feldspars, ,, and our ash samples were not milled or ground. Additionally, the similar freezing behavior and bulk composition of all three ashes suggest that these small differences in composition do not play a role in determining the IN behavior of the Santiaguito and SHV ashes.…”

Section: Resultsmentioning

confidence: 53%

“…This is unsurprising, as within the dust generator an air jet is used to resuspend the particles, causing particles to collide with each other or with the chamber walls and thus increase their surface area through mechanical weathering. Mechanical weathering through milling was previously observed to increase the IN activity of some quartz samples , while also leaving other quartz and feldspar samples relatively unaffected . Mechanical weathering can fracture or ablate the particle surface, remove coatings or less reactive areas that have formed on the particle due to natural weathering, and potentially break up particles or particle aggregates.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Role of Feldspar and Pyroxene Minerals in the Ice Nucleating Ability of Three Volcanic Ashes

Jahn

Fahy

Williams

et al. 2019

ACS Earth Space Chem.

View full text Add to dashboard Cite

The mineralogical and immersion-mode freezing properties of volcanic ashes from three volcanoes, Volcań de Fuego and Santiaguito in Guatemala, and Soufriere Hills Volcano, in Montserrat, were examined. All ashes (sieved to <37 μm) contained effective ice nuclei, typically freezing over the temperature range of −12 to −25 °C and possessing ice active site densities (n s ) spanning ∼10 1 to 10 5 cm −2 over this temperature range. The high freezing activity of the ashes was determined to likely originate from pyroxene minerals, and the ice nucleation properties of pyroxene minerals are also reported here for the first time for comparison. Ca-and Narich plagioclase feldspars also contributed to the observed freezing properties. Volcanic glass was present in all of the samples and is theorized to be a much weaker ice nucleant, effectively diluting the freezing ability of the crystalline mineral phases. Smaller particle size fractions of the Volcań de Fuego ash were observed to contain more active ice nucleating particles, attributed to an increase in the amount of pyroxene minerals with decreasing particle size fraction. The particle resuspension and size segregated collection process was also observed to increase the ice nucleating ability of all size fractions, likely due to mechanical ablation removing passivated surfaces and exposing fresher and more ice-active mineral surfaces.

show abstract

Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Role of Feldspar and Pyroxene Minerals in the Ice Nucleating Ability of Three Volcanic Ashes

Jahn

Fahy

Williams

et al. 2019

ACS Earth Space Chem.

View full text Add to dashboard Cite

show abstract

“…to increase the INA of quartz (Zolles et al, 2015;Kumar et al, 2018b;Harrison et al, 2019). They may also, however, be the most unstable sites as (Harrison et al, 2019) observed measurable 'ageing' in quartz samples (including Atkinson Quartz and Fluka Quartz) that were immersed in room temperature water for only 1 h. Our wet heat treatment of Atkinson Quartz resulted in an INA deactivation of similar magnitude (∆T50 wet around 7 °C) to that achieved after 16 months of aqueous room temperature ageing by Harrison et al (2019).…”

Section: Silicassupporting

confidence: 49%

The sensitivity of the ice-nucleating ability of minerals to heat and the implications for the heat test for biological ice nucleators

Daily

Tarn

Whale

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Ice-nucleating particles (INPs) are atmospheric aerosol particles that can strongly influence the radiative properties and precipitation onset in mixed-phase clouds by triggering ice formation in supercooled cloud water droplets. The ability to distinguish between INPs of mineral and biological origin in samples collected from the environment is needed to better understand their distribution and sources, but this is challenging. A common method for assessing the relative contributions of mineral and biogenic INPs in samples collected from the environment (e.g., aerosol, rainwater, soil) is to determine the ice-nucleating ability (INA) before and after heating, where heat is expected to denature proteins associated with biological ice nucleants. The key assumption is that the ice nucleation sites of biological origin are denatured by heat, while those associated with mineral surfaces remain unaffected; we test this assumption here. We exposed atmospherically relevant mineral samples to wet heat (INP suspensions warmed to above 90 °C) or dry heat (dry samples heated to 250 °C) and assessed the effects on their immersion mode INA using a droplet freezing assay. K-feldspar, thought to be the dominant mineral-based atmospheric INP type where present, was not significantly affected by wet heating, while quartz, plagioclase feldspars and Arizona test Dust (ATD) lost INA when heated in this mode. We argue that these reductions in INA in the aqueous phase result from direct alteration of the mineral particle surfaces by heat treatment rather than from biological or organic contamination. We hypothesise that degradation of active sites by dissolution of mineral surfaces is the mechanism in all cases due to the correlation between mineral INA deactivation magnitudes and their dissolution rates. Dry heating produced minor but repeatable deactivations in K-feldspar particles but was generally less likely to deactivate minerals compared to wet heating. We also heat tested proteinaceous and non-proteinaceous biogenic INP proxy materials and found that non-proteinaceous samples (cellulose and pollen) were relatively heat resistant. In contrast, the proteinaceous ice-nucleating samples were highly sensitive to wet and dry heat, as expected, although their activity remained non-negligible after heating. We conclude that, while INP heat tests have the potential to produce false positives, i.e., deactivation of a mineral INA that could be misconstrued as the presence of biogenic INPs, they are still a valid method for qualitatively detecting proteinaceous biogenic INP in ambient samples, so long as the mineral-based INA is controlled by K-feldspar.

show abstract

“…Even though desert soils contain typically < 1 % organic matter due to the low average annual precipitation (Troeh and Thompson, 2005), long-range transport of dust has been suggested to efficiently disperse bacteria on a global scale (Hara and Zhang, 2012). Enriched fluorescent particle concentrations, an indication for enriched biological material, were found in long-range transported Saharan dust by Kupiszewski et al (2015) in ice crystal residuals from mixedphase clouds in the Swiss Alps and in condensation-mode INPs at 241 K by Boose et al (2016b) on the Canary Islands. In contrast to biological material, secondary organic aerosol coatings have been observed to decrease the ice nucleation ability of dust particles in the laboratory in deposition mode (Möhler et al, 2008) but not in condensation mode (Koehler et al, 2010;Kanji et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide – Part 2: Deposition nucleation and condensation freezing

Boose

Baloh

Plötze³

et al. 2019

Atmos. Chem. Phys.

View full text Add to dashboard Cite

Abstract. Mineral dust particles from deserts are amongst the most common ice nucleating particles in the atmosphere. The mineralogy of desert dust differs depending on the source region and can further fractionate during the dust emission processes. Mineralogy to a large extent explains the ice nucleation behavior of desert aerosol, but not entirely. Apart from pure mineral dust, desert aerosol particles often exhibit a coating or are mixed with small amounts of biological material. Aging on the ground or during atmospheric transport can deactivate nucleation sites, thus strong ice nucleating minerals may not exhibit their full potential. In the partner paper of this work, it was shown that mineralogy determines most but not all of the ice nucleation behavior in the immersion mode found for desert dust. In this study, the influence of semi-volatile organic compounds and the presence of crystal water on the ice nucleation behavior of desert aerosol is investigated. This work focuses on the deposition and condensation ice nucleation modes at temperatures between 238 and 242 K of 18 dust samples sourced from nine deserts worldwide. Chemical imaging of the particles' surface is used to determine the cause of the observed differences in ice nucleation. It is found that, while the ice nucleation ability of the majority of the dust samples is dominated by their quartz and feldspar content, in one carbonaceous sample it is mostly caused by organic matter, potentially cellulose and/or proteins. In contrast, the ice nucleation ability of an airborne Saharan sample is found to be diminished, likely by semi-volatile species covering ice nucleation active sites of the minerals. This study shows that in addition to mineralogy, other factors such as organics and crystal water content can alter the ice nucleation behavior of desert aerosol during atmospheric transport in various ways.

show abstract

Ice nucleation activity of silicates and aluminosilicates in pure water and aqueous solutions. Part 2 – Quartz and amorphous silica

Cited by 5 publications

References 115 publications

Role of Feldspar and Pyroxene Minerals in the Ice Nucleating Ability of Three Volcanic Ashes

Role of Feldspar and Pyroxene Minerals in the Ice Nucleating Ability of Three Volcanic Ashes

The sensitivity of the ice-nucleating ability of minerals to heat and the implications for the heat test for biological ice nucleators

Heterogeneous ice nucleation on dust particles sourced from nine deserts worldwide – Part 2: Deposition nucleation and condensation freezing

Contact Info

Product

Resources

About