ammonium sulfate bertram

  • Hygroscopic Properties and Phase Bertram group website

    ammonium sulfate malonic acid particles during deliquescence Experimental data The images are of ammonium sulfate malonic acid particles (xMal = 0.240) during deliquescence at relative humidities of (A) 76.3 (B) 77.2 (C) 77.7 (D) 78.2 and during crystallization at relative humidities equal to (E) 30.4 (F) 29.3 (G) 29.2 (H

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  • How Well Does Water Activity Determine Homogeneous Ice

    Frozen fraction measurements made using a droplet free-fall freezing tube apparatus are presented and used along with other recent laboratory measurements to evaluate how well b

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  • Hygroscopic Properties and Phase Bertram group website

    ammonium sulfate malonic acid particles during deliquescence Experimental data The images are of ammonium sulfate malonic acid particles (xMal = 0.240) during deliquescence at relative

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  • Phase State and Deliquescence Hysteresis of Ammonium

    (LLPS) can be parameterized for the organic-to-sulfate ratio of SOA and the oxygen-to-carbon (O/C) ratio (Bertram et al. 2011 and further elaborated by Song et al. 2012) as recently reviewed by You et al. (2014). The evolution of SOM in the atmosphere is a complex phe-nomenon and research is now seeking to constrain the param-

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  • 8.4 Ammonium Sulfate

    8.4 Ammonium Sulfate 8.4.1 General1-2 Ammonium sulfate ( NH4 2SO4) is commonly used as a fertilizer. In 1991 U. S. facilities produced about 2.7 million megagrams (Mg) (3 million tons) of ammonium sulfate in about 35 plants. Production rates at these plants range from 1.8 to 360 Mg (2 to 400 tons) per year.

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  • Effects of molecular weight and temperature on liquid

    at 273K and 290K for particles containing ammonium sul-fate and 1 2 6-hexanetriol (Bertram et al. 2011). Schill and Tolbert 2013 reported that SRH results were similar for tem-peratures from 240 to 265K for particles containing ammo-nium sulfate mixed with 1 2 6-hexanetriol and particles con-taining ammonium sulfate

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  • Mutual Impact of Mineral and Organic Components in

    Mar 12 2020 · A. K. Bertram S. T. Martin S. J. Hanna et al. "Predicting the relative humidities of liquid-liquid phase separation efflorescence and deliquescence of mixed particles of ammonium sulfate organic material and water using the organic-to-sulfate

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  • Liquid-liquid phase separation in atmospheric aerosol

    Recent studies on a limited number of model systems have shown that oxygen-to-carbon ratios (O C) of the organic aerosol fraction might be a good predictor for LLPS in mixed organic/ammonium sulfate (AS) particles (Bertram

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  • Deactivation of ice nuclei due to atmospherically relevant

    The ice nucleation characteristics of Arizona test dust (ATD) and illite clay surrogates for atmospheric ice nuclei have been determined at the Aerosol Interactions and Dynamics in the Atmosphere (AIDA) chamber located at the Research Center Karlsruhe in Germany. The objective of this research was to determine the effect of sulfuric acid and ammonium sulfate

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  • Temperature dependence of heterogeneous uptake of N2O5 by

    Jul 20 2009 · An analysis of the data for ammonium sulfate using Equation and assuming that γ = α yields values of ΔH obs = −33 kJ/mol and ΔS obs = −152 J K −1 mol −1 for the enthalpy and entropy of accommodation for ammonium sulfate

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  • 20 lb. Ammonium Sulfate 21-0-0-LG 40006-50The Home Depot

    May 28 2020 · Lawn and Garden Ammonium Sulfate has an NPK of 21-0-0. An economical source of quick greening nitrogen with high sulfur. Use for rapid growth and to increase plant greening. Stimulates vegetative growth and produces deep green color Contains high sulfur improving color and density of

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  • Crystallization of Aqueous Ammonium Sulfate Particles

    Using optical microscopy we investigated the crystallization of aqueous ammonium sulfate droplets containing soot and kaolinite as well as the crystallization of aqueous ammonium sulfate droplets free of solid material. Our results show that soot did not influence the crystallization RH of aqueous ammonium sulfate

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  • Ammonium Bisulfate/Water A Pseudobinary System

    For the first time high-temperature polymorphic transition of ammonium sulfate (NH4)2SO4 (Tpt ∼ 370 °C) was experimentally recorded and characterized by differential scanning calorimetry.

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  • Deliquescence and crystallization of ammonium sulfate

    In the following we report the deliquescence relative humidities (DRH) and crystallization relative humidities (CRH) of mixed inorganic-organic particles specifically ammonium sulfate-glutaric acid

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  • Liquid–liquid phase separation in particles containing

    ics mixed with ammonium sulfate suggest that SRH often is not dependent on the OIR for a wide range of OIR val-ues (Ciobanu et al. 2009 Bertram et al. 2011 Song et al. 2012a b). As an example Bertram et al. (2011) investigated the effect of OIR on SRH in eleven different types of par-ticles containing organics and ammonium sulfate

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  • Solid Ammonium Sulfate Aerosols as Ice Nuclei A Pathway

    Sep 22 2006 · Laboratory measurements support a cirrus cloud formation pathway involving heterogeneous ice nucleation by solid ammonium sulfate aerosols. Ice formation occurs at low ice

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  • Deliquescence efflorescence and phase miscibility of

    ence of NOx can decrease the DRH of ammonium sulfate by at least 5 though the exact decrease was not quantified. Bertram et al. (2011) likewise presented an initial data set for the effects of SOM produced by isoprene photo-oxidation on the phase transitions of ammonium sulfate

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  • Liquid–liquid phase separation in particles containing

    ics mixed with ammonium sulfate suggest that SRH often is not dependent on the OIR for a wide range of OIR val-ues (Ciobanu et al. 2009 Bertram et al. 2011 Song et al. 2012a b). As an example Bertram et al. (2011) investigated the effect of OIR on SRH in eleven different types of par-ticles containing organics and ammonium sulfate. For eight

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  • RSC CP C3CP51595H 3.

    water ammonium sulfate and organics from the ozone Fig. 1 Equilibrium phases and particle morphologies for the system of a-pinene SOA (ozone oxidation) ammonium sulfate and water as

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  • Images reveal that atmospheric particles can undergo

    Aug 14 2012 · Bertram AK et al. Predicting the relative humidities of liquid-liquid phase separation efflorescence and deliquescence of mixed particles of ammonium sulfate organic material and water using the organic-to-sulfate

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  • Liquid-liquid phase separation in atmospheric aerosol

    Recent studies on a limited number of model systems have shown that oxygen-to-carbon ratios (O C) of the organic aerosol fraction might be a good predictor for LLPS in mixed organic/ammonium sulfate (AS) particles (Bertram

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  • Deliquescence and crystallization of ammonium sulfate

    Deliquescence and crystallization of ammonium sulfate-glutaric acid and sodium chloride-glutaric acid particles Atul Pant Abel Fok Matthew T. Parsons Jackson Mak and Allan K. Bertram Dept. of

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  • Viscosities diffusion coefficients and mixing times of

    ing on the surface of a solution of 0.1M ammonium sulfate (>99 EMD) in a larger covered petri dish. Over a period of 3 to 5 days the ammonia vapor in equilibrium with the ammonium sulfate solution

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  • Images reveal that atmospheric particles can undergo

    Aug 14 2012 · Ammonium sulfate seed particles were introduced into the chamber by atomization of a solution of (NH 4) 2 SO 4 which was then dried using a diffusion dryer. The α-pinene and ozone were introduced to the chamber by a flow of purified air. Bertram AK et al. (2011) Predicting the relative humidities of liquid-liquid phase separation

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  • Ammonium sulfateWikipedia

    Uses. The primary use of ammonium sulfate is as a fertilizer for alkaline soils the soil the ammonium ion is released and forms a small amount of acid lowering the pH balance of the soil while contributing essential nitrogen for plant growth. The main disadvantage to the use of ammonium sulfate is its low nitrogen content relative to ammonium nitrate which elevates transportation costs.

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  • Effects of sulfuric acid and ammonium sulfate coatings on

    Effects of sulfuric acid and ammonium sulfate coatings on the ice nucleation properties of kaolinite particles Publication Type of mineral dust particles. Citation Eastwood M. L. S. Cremel M. Wheeler B. J. Murray E. Girard and A. K. Bertram (2009) Effects of sulfuric acid and ammonium sulfate

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  • General parameterization of N2O5 reactivity

    Toward a general parameterization of N2O5 reactivity on aqueous particles the competing effects of particle liquid water nitrate and chloride T. H. Bertram and J. A. Thornton Department of Atmospheric Sciences University of Washington Seattle WA USA now at Department of Chemistry University of California San Diego La Jolla CA USA Received 12 June 2009Accepted 3 July 2009

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  • Hygroscopic Properties and Phase Bertram group website

    ammonium sulfate malonic acid particles during deliquescence Experimental data The images are of ammonium sulfate malonic acid particles (xMal = 0.240) during deliquescence at relative

    Get Price
  • Deliquescence and crystallization of ammonium sulfate

    Deliquescence and crystallization of ammonium sulfate-glutaric acid and sodium chloride-glutaric acid particles Atul Pant Abel Fok Matthew T. Parsons Jackson Mak and Allan K. Bertram Dept. of

    Get Price
  • Ammonium Bisulfate/Water A Pseudobinary System

    For the first time high-temperature polymorphic transition of ammonium sulfate (NH4)2SO4 (Tpt ∼ 370 °C) was experimentally recorded and characterized by differential scanning calorimetry.

    Get Price
  • Temperature dependence of heterogeneous uptake of N2O5 by

    Jul 20 2009 · An analysis of the data for ammonium sulfate using Equation and assuming that γ = α yields values of ΔH obs = −33 kJ/mol and ΔS obs = −152 J K −1 mol −1 for the enthalpy and entropy of accommodation for ammonium sulfate

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  • Deliquescence and crystallization of ammonium sulfate

    Deliquescence and crystallization of ammonium sulfate-glutaric acid and sodium chloride-glutaric acid particles Atul Pant Abel Fok Matthew T. Parsons Jackson Mak and Allan K. Bertram Dept. of Chemistry the Univ. of British Columbia Vancouver B. C. Canada Received 18 March 2004 revised 10 May 2004 accepted 26 May 2004 published 25 June 2004. 1

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  • Phase State and Deliquescence Hysteresis of Ammonium

    (LLPS) can be parameterized for the organic-to-sulfate ratio of SOA and the oxygen-to-carbon (O/C) ratio (Bertram et al. 2011 and further elaborated by Song et al. 2012) as recently reviewed by You et

    Get Price
  • Solid Ammonium Sulfate Aerosols as Ice Nuclei A Pathway

    Sep 22 2006 · Laboratory measurements support a cirrus cloud formation pathway involving heterogeneous ice nucleation by solid ammonium sulfate aerosols. Ice formation occurs at low ice-saturation ratios consistent with the formation of continental cirrus and an interhemispheric asymmetry observed for cloud onset. In a climate model this mechanism provides a widespread source of ice

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  • Liquid-liquid phase separation in atmospheric aerosol

    Recent studies on a limited number of model systems have shown that oxygen-to-carbon ratios (O C) of the organic aerosol fraction might be a good predictor for LLPS in mixed organic/ammonium sulfate (AS) particles (Bertram

    Get Price
  • ‪Allan Bertram‬‪Google Scholar‬

    Deliquescence and crystallization of ammonium sulfate particles internally mixed with water-soluble organic compounds MT Parsons DA Knopf AK Bertram The Journal of Physical Chemistry A 108 (52) 11600-11608 2004

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