Levels and Characteristics of Carbonyl Compounds Indoor Malls and their Relationship with Ozone

Chun Juan Xie; Jian Li; Ping Xie; Liu Shui Yan

doi:10.4028/www.scientific.net/AMR.726-731.1341

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 726-731Levels and Characteristics of Carbonyl Compounds...

Levels and Characteristics of Carbonyl Compounds Indoor Malls and their Relationship with Ozone

Abstract:

Ambient levels of carbonyl compounds and their possible sources were investigated in four types of eight shopping malls both in winter and summer in urban district of Nanchang, China. Eighteen out of the twenty target carbonyls were detected in summer samplers while only fifteen carbonyls were detected in winter samplers. Isovaleraldehyde and 2,5-Dimethylbenzaldehyde were close to or under the detection limit in any of the samples, whereas acrolein, o-Tolualdehyde and m-Tolualdehyde were present in only a few summer samples. For the most abundant carbonyls, relative good correlations were found between the concentration of formaldehyde and ozone (R=0.75, p<0.01), acetaldehyde and ozone (R=0.59, p<0.01) in summer (R=0.56, p<0.01), while lower correlation in winter especially for acetaldehyde R=0.46 and acetone R=0.36 p<0.01). This simply means formaldehyde and acetaldehyde in the malls had a significant formation via ozone chemistry in the summer but was poorly correlated with the ozone in winter.