Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/15728
Title: PM2.5 acidity at a background site in the Pearl River Delta region in fall-winter of 2007-2012
Authors: Fu, X
Guo, H 
Wang, X
Ding, X
He, Q
Liu, T
Zhang, Z
Keywords: Haze
Nitrate
PM2.5 acidity
Secondary organic carbon
Sulfate
Issue Date: 2015
Publisher: Elsevier
Source: Journal of hazardous materials, 2015, v. 286, p. 484-492 How to cite?
Journal: Journal of hazardous materials 
Abstract: Based on field observations and thermodynamic model simulation, the annual trend of PM2.5 acidity and its characteristics on non-hazy and hazy days in fall-winter of 2007-2012 in the Pearl River Delta region were investigated. Total acidity ([H+]total) and in-situ acidity ([H+]in-situ) of PM2.5 significantly decreased (F-test, p<0.05) at a rate of -32¡Ó1.5nmolm-3year-1 and -9¡Ó1.7nmolm-3year-1, respectively. The variation of acidity was mainly caused by the change of the PM2.5 component, i.e., the decreasing rates of [H+]total and [H+]in-situ due to the decrease of sulfate (SO4 2-) exceeded the increasing rate caus
URI: http://hdl.handle.net/10397/15728
ISSN: 0304-3894
EISSN: 1873-3336
DOI: 10.1016/j.jhazmat.2015.01.022
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