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Cloud condensation nuclei ( CCN ) activity of aliphatic amine secondary aerosol
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tang, Xiaochen Praske, Eric Joseph Vu, Doan Nguyen Purvis-Roberts, Kathleen L. Asa-Awuku, Akua |
| Copyright Year | 2014 |
| Abstract | Aliphatic amines can form secondary aerosol via oxidation with atmospheric radicals (e.g., hydroxyl radical and nitrate radical). The particle can contain both secondary organic aerosol (SOA) and inorganic salts. The ratio of organic to inorganic materials in the particulate phase influences aerosol hygroscopicity and cloud condensation nuclei (CCN) activity. SOA formed from trimethylamine (TMA) and butylamine (BA) reactions with hydroxyl radical (OH) is composed of organic material of low hygroscopicity (single hygroscopicity parameter, κ ≤ 0.25). Secondary aerosol formed from the tertiary aliphatic amine (TMA) with N 2O5 (source of nitrate radical, NO 3) contains less volatile compounds than the primary aliphatic amine (BA) aerosol. As relative humidity (RH) increases, inorganic amine salts are formed as a result of acid–base reactions. The CCN activity of the humid TMA–N2O5 aerosol obeys Zdanovskii, Stokes, and Robinson (ZSR) ideal mixing rules. The humid BA + N2O5 aerosol products were found to be very sensitive to the temperature at which the measurements were made within the streamwise continuous-flow thermal gradient CCN counter; κ ranges from 0.4 to 0.7 dependent on the instrument supersaturation (ss) settings. The variance of the measured aerosol κ values indicates that simple ZSR rules cannot be applied to the CCN results from the primary aliphatic amine system. Overall, aliphatic amine aerosol systems’κ ranges within 0.2 <κ < 0.7. This work indicates that aerosols formed via nighttime reactions with amines are likely to produce hygroscopic and volatile aerosol, whereas photochemical reactions with OH produce secondary organic aerosol of lower CCN activity. The contributions of semivolatile secondary organic and inorganic material from aliphatic amines must be considered for accurate hygroscopicity and CCN predictions from aliphatic amine systems. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.atmos-chem-phys.net/14/5959/2014/acp-14-5959-2014.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Aerosol Dose Form Aerosols Amine Oxidase (Copper-Containing) Amines Business architecture Cerebellar Nuclei Chemistry, Bioinorganic Cyclomatic complexity Gradient Hydroxyl Radical Monoamine Oxidase Navier–Stokes equations Neoplasm Metastasis Neoplasms, Unknown Primary Nitrates Nitric Oxide Non-volatile memory Particulate (substance) Population Parameter Relative humidity:Relative Mass Concentration:Point in time:Air:Quantitative Rule (guideline) Salts Sample Variance Thioctic Acid Thrombotic Microangiopathies Tower Mounted Amplifier butylamine negative regulation of chromosome condensation negative regulation of secondary cell wall biogenesis oxidation positive regulation of inorganic anion transmembrane transport tertiary trimethylamine |
| Content Type | Text |
| Resource Type | Article |
