[Secondary Organic Aerosol Mass Yield and Characteristics from 4-ethylguaiacol Aqueous·OH Oxidation: Effects of Initial Concentration].

Aqueous-phase chemical processing, as an essential formation pathway of secondary organic aerosol (SOA), has attracted widespread attention from within atmospheric chemistry fields. Due to the complicated reaction nature, reaction mechanisms, and product characteristics of aqueous-phase chemical processing, its contribution to the SOA budget is still not fully understood. In this work, we investigate how the initial concentration (0.

[Secondary Organic Aerosols from Aqueous Reaction of Aerosol Water].

Liquid water (cloud/fog droplets and aerosols) is ubiquitous in the atmosphere and can provide an important reaction media for aqueous-phase chemical reactions. Gaseous precursors (mainly VOCs) or their gas-phase initial or first-generation oxidation products (including intermediate-volatility and semi-volatile organic compounds; I/SVOCs) can undergo chemical reactions in the atmospheric condensed phase (aqueous phase) to form low-volatility, highly oxidized organic matter[e.g.

[Pollution Characteristics of Aerosol Number Concentration in Winter and Spring in a Northern Suburb of Nanjing].

Using APS-3321, the atmospheric aerosol number concentrations (0.5-20 μm) were continuously monitored to analyze the characteristics of winter and spring pollution in 2014 in a northern suburb of Nanjing. The average number concentrations were (364.

[Pollution Characteristics and Source Identification of PAHs in Atmospheric PM in Changzhou City].

A total of 55 ambient fine particle (PM) samples were collected in Changzhou City from January to August 2016. The concentrations of 17 PM-bound PAHs in the samples were analyzed by GC-MS. Results showed that seasonal average mass concentrations of PAHs in winter, spring, and summer were 140.

[Pollution Characteristics and Light Extinction Contribution of Water-soluble Ions of PM in Hangzhou].

The pollution characteristics and light extinction contribution of water-soluble ions of PM in Hangzhou were investigated by sampling and laboratory analysis of aerosol samplers in 2013. The water-soluble ions were dominant in PM and the total mass concentration was 37.5 μg·m, accounting for 44.

[Variation of Size Distribution and the Influencing Factors of Aerosol in Northern Suburbs of Nanjing].

The size distribution of particulate was analyzed by the FA-3 9 stage sampler in Northern-suburb of Nanjing from January to November in 2014. First, the monitoring result from FA-3 was compared with the results of the same period obtained from a medium flow size grading sampler (KC-120H) and online monitoring instrument of the Environmental Protection Agency. The data correlation coefficients were all greater than 0.