scholarly journals The Chemistry of Dicarboxylic Acids in the Atmospheric Aerosols

10.5772/50127 ◽  
2012 ◽  
Author(s):  
Mohd Zul Helmi Rozaini
Keyword(s):  
Atmospheric Aerosols ◽  
Dicarboxylic Acids

scholarly journals Dicarboxylic acids, oxocarboxylic acids and α-dicarbonyls in atmospheric aerosols from Mt. Fuji, Japan: Implication for primary emission versus secondary formation

2019 ◽  
Vol 221 ◽  
pp. 58-71 ◽  
Author(s):  
Bhagawati Kunwar ◽  
Kimitaka Kawamura ◽  
Shintaro Fujiwara ◽  
Pingqing Fu ◽  
Yuzo Miyazaki ◽  
...  
Keyword(s):  
Atmospheric Aerosols ◽  
Dicarboxylic Acids ◽  
Secondary Formation ◽  
Oxocarboxylic Acids

scholarly journals A curved multi-component aerosol hygroscopicity model framework: Part 2 – Including organic compounds

2005 ◽  
Vol 5 (5) ◽  
pp. 1223-1242 ◽  
Author(s):  
D. O. Topping ◽  
G. B. McFiggans ◽  
H. Coe
Keyword(s):  
Surface Tension ◽  
Atmospheric Aerosols ◽  
Dynamic Balance ◽  
Laboratory Data ◽  
Dicarboxylic Acids ◽  
Companion Paper ◽  
Particulate Material ◽  
Dry Density ◽  
Model Framework ◽  
Organic Systems

Abstract. This paper describes the inclusion of organic particulate material within the Aerosol Diameter Dependent Equilibrium Model (ADDEM) framework described in the companion paper applied to inorganic aerosol components. The performance of ADDEM is analysed in terms of its capability to reproduce the behaviour of various organic and mixed inorganic/organic systems using recently published bulk data. Within the modelling architecture already described two separate thermodynamic models are coupled in an additive approach and combined with a method for solving the Kohler equation in order to develop a tool for predicting the water content associated with an aerosol of known inorganic/organic composition and dry size. For development of the organic module, the widely used group contribution method UNIFAC is employed to explicitly deal with the non-ideality in solution. The UNIFAC predictions for components of atmospheric importance were improved considerably by using revised interaction parameters derived from electro-dynamic balance studies. Using such parameters, the model was found to adequately describe mixed systems including 5–6 dicarboxylic acids, down to low relative humidity conditions. By comparison with electrodynamic balance data, it was also found that the model was capable of capturing the behaviour of aqueous aerosols containing Suwannee River Fulvic acid, a structure previously used to represent the functionality of complex oxidised macromolecules often found in atmospheric aerosols. The additive approach for modelling mixed inorganic/organic systems worked well for a variety of mixtures. As expected, deviations between model predictions and measurements increase with increasing concentration. Available surface tension models, used in evaluating the Kelvin term, were found to reproduce measured data with varying success. Deviations from experimental data increased with increased organic compound complexity. For components only slightly soluble in water, significant deviations from measured surface tension depression behaviour were predicted with both model formalisms tested. A Sensitivity analysis showed that such variation is likely to lead to predicted growth factors within the measurement uncertainty for growth factor taken in the sub-saturated regime. Greater sensitivity was found for the value of dry density used in the assumed form of the dried out aerosol. Comparison with a coupled thermodynamic approach showed that assumed values for interactions parameters may lead to erroneous results where a simple additive approach may provide more accurate results. However, where available, the use of coupled thermodynamics can better reproduce measured behaviour. Further work (and laboratory data) is required to assess whether this difference lies within the experimental uncertainty of observed hygroscopic behaviour for a variety of systems.

scholarly journals Interaction of oxalic acid with methylamine and its atmospheric implications

RSC Advances ◽  
2018 ◽  
Vol 8 (13) ◽  
pp. 7225-7234 ◽  
Author(s):  
Yu Hong ◽  
Yi-Rong Liu ◽  
Hui Wen ◽  
Shou-Kui Miao ◽  
Teng Huang ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Atmospheric Aerosols ◽  
Dicarboxylic Acids

Oxalic acid, which is one of the most common dicarboxylic acids, is expected to be an important component of atmospheric aerosols.

The Odd–Even Behaviour of Dicarboxylic Acids Solubility in the Atmospheric Aerosols

2008 ◽  
Vol 198 (1-4) ◽  
pp. 65-75 ◽  
Author(s):  
Mohd Zul Helmi Rozaini ◽  
Peter Brimblecombe
Keyword(s):  
Atmospheric Aerosols ◽  
Dicarboxylic Acids
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