Aihua Zheng

TL;DR: In this article, daily PM 2.5 aerosol samples were collected at five sites in Beijing for a 3-year period from 2001 to 2003, and 23 elements were measured for a total of 334 samples.

TL;DR: In this article, the chemistry of formic, acetic and oxalic acids was studied at four sites representing the urban and rural conditions in Beijing from March 2002 to October 2003.

TL;DR: In this article, the chemical constituents, possible sources and wet deposition flux of water-soluble ions (NH4+, NO3−, SO42−, Cl−, Na+, K+, Ca2+, Mg2+) in precipitation samples collected during 2017-2018 at a rural site located at northwest of Beijing city were also quantified.

TL;DR: In order to quantify the effect of a festival in which pollution was expected to be reduced, Wang et al. as discussed by the authors collected and analyzed PM2.5 samples in urban Beijing during the 2015 Spring Festival (from February 9 to March 6, 2015).

TL;DR: Considering the higher concentrations of NH4+ and higher ratio ofNH4+/NO3- measured in fog than in rain, it is suggested that quantification of fog nitrogen deposition and its ecological effect in this area should be given more attention.