Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/65652
PIRA download icon_1.1View/Download Full Text
Title: Evaluation of the effectiveness of air pollution control measures in Hong Kong
Authors: Lyu, XP 
Zeng, LW 
Guo, H 
Simpson, IJ
Ling, ZH
Wang, Y 
Murray, F
Louie, PKK
Saunders, SM
Lam, SHM
Blake, DR
Issue Date: Jan-2017
Source: Environmental pollution, Jan. 2017, v. 220, part A, p. 87-94
Abstract: From 2005 to 2013, volatile organic compounds (VOCs) and other trace gases were continuously measured at a suburban site in Hong Kong. The measurement data showed that the concentrations of most air pollutants decreased during these years. However, ozone (O3) and total non-methane hydrocarbon levels increased with the rate of 0.23 ± 0.03 and 0.34 ± 0.02 ppbv/year, respectively, pointing to the increasing severity of photochemical pollution in Hong Kong. The Hong Kong government has ongoing programs to improve air quality in Hong Kong, including a solvent program implemented during 2007–2011, and a diesel commercial vehicle (DCV) program since 2007. From before to after the solvent program, the sum of toluene, ethylbenzene and xylene isomers decreased continuously with an average rate of ?99.1 ± 6.9 pptv/year, whereas the sum of ethene and propene increased by 48.2 ± 2.0 pptv/year from before to during the DCV program. Despite this, source apportionment results showed that VOCs emitted from diesel exhaust decreased at a rate of ?304.5 ± 17.7 pptv/year, while solvent related VOCs decreased at a rate of ?204.7 ± 39.7 pptv/year. The gasoline and liquefied petroleum gas vehicle emissions elevated by 1086 ± 34 pptv/year, and were responsible for the increases of ethene and propene. Overall, the simulated O3 rate of increase was lowered from 0.39 ± 0.03 to 0.16 ± 0.05 ppbv/year by the solvent and DCV programs, because O3 produced by solvent usage and diesel exhaust related VOCs decreased (p < 0.05) by 0.16 ± 0.01 and 0.05 ± 0.01 ppbv/year between 2005 and 2013, respectively. However, enhanced VOC emissions from gasoline and LPG vehicles accounted for most of the O3 increment (0.09 ± 0.01 out of 0.16 ± 0.05 ppbv/year) in these years. To maintain a zero O3 increment in 2020 relative to 2010, the lowest reduction ratio of VOCs/NOx was ?1.5 under the NOx reduction of 20–30% which was based on the emission reduction plan for Pearl River Delta region in 2020.
Keywords: Air pollution
Control measures
MCM
Ozone
Photochemical pollution
Publisher: Pergamon Press
Journal: Environmental pollution 
ISSN: 0269-7491
EISSN: 1873-6424
DOI: 10.1016/j.envpol.2016.09.025
Rights: © 2016 Elsevier Ltd. All rights reserved.
© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
The following publication Lyu, X. P., Zeng, L. W., Guo, H., Simpson, I. J., Ling, Z. H., Wang, Y., ... & Blake, D. R. (2017). Evaluation of the effectiveness of air pollution control measures in Hong Kong. Environmental pollution, 220, 87-94 is available at https://doi.org/10.1016/j.envpol.2016.09.025
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
Lyu_Observatisotracers_Mountainous_Site.pdfPre-Published version1.65 MBAdobe PDFView/Open
Open Access Information
Status open access
File Version Final Accepted Manuscript
Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page views

181
Last Week
1
Last month
Citations as of Mar 24, 2024

Downloads

31
Citations as of Mar 24, 2024

SCOPUSTM   
Citations

37
Last Week
0
Last month
Citations as of Mar 28, 2024

WEB OF SCIENCETM
Citations

33
Last Week
0
Last month
Citations as of Mar 28, 2024

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.