Science & Technology Review >

2015 , Vol. 33 >Issue 6: 13 - 19

DOI: https://doi.org/10.3981/j.issn.1000-7857.2015.06.001

Spescial Issues

Gaseous and particulate carbonyl compounds in Shanghai ambient air

  • WANG Fang ,
  • FENG Yanli ,
  • JIANG Zhiming ,
  • QIU Yiqin ,
  • CHEN Yingjun
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  • 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
    2. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China

Received date: 2015-02-09

  Revised date: 2015-02-26

  Online published: 2015-04-10

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Abstract

In order to explore the concentration levels and variations of carbonyl compounds in the atmosphere, a filter pack (FP) system was used to collect gaseous and particulate carbonyl compounds simultaneously in Shanghai ambient air. There are three 47 mm filters in the FP system. Particulate carbonyls were collected on the first filter directly and then the gaseous carbonyls were collected on the second and third filters impregnated with PFBHA. The coating amount of PFBHA was 12 μmol, the sampling flow was 4 L·min-1 for 4 hours. The filter samples were extracted by hexane and injected into the GC/MS system. Seasonal and diurnal variations of carbonyl compounds as well as the gas-particle partitioning were studied. The results showed as follows: 1) 15 target carbonyl compounds are all detected in Shanghai ambient air, including 13 mono-carbonyls and 2 dicarbonyls; 2) the carbonyl compounds exhibit significant seasonal and diurnal variations with higher concentrations in summer, the concentrations of gaseous carbonyls reach the maximum at noon while the particle phases achieve the minimum values at the same time; the total concentration of carbonyls is 33.8±15.9 μg/m3 in summer, significantly higher than the levels in winter (10.5±5.0 μg/m3) and spring (14.0±7.0 μg/m3); 3) gas-particle partitioning of carbonyl compounds is found to be positively correlated with ambient temperature while negatively with relative humidity. Compared to the annular denuder-filter pack (AD-FP) system, the FP system is more suitable for field observation.

Key words： filter pack system; o-(2, 3, 4, 5, 6-pentafluorobenzyl) hydroxylamine; carbonyl compounds; gas/particle partitioning

Cite this article

WANG Fang , FENG Yanli , JIANG Zhiming , QIU Yiqin , CHEN Yingjun . Gaseous and particulate carbonyl compounds in Shanghai ambient air[J]. Science & Technology Review, 2015 , 33(6) : 13 -19 . DOI: 10.3981/j.issn.1000-7857.2015.06.001

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