室内环境嗜松青霉的MVOCs释放特征及影响因素

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Abstract Penicillium pinophilum was used as an example in this study and headspace-solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) was used to collect and analyze microbial volatile organic compounds (MVOCs). The effects of the growth time, the temperature, the light and the oxygen content on the characteristics of MVOCs were investigated, and each contribution to indoor VOCs was discussed. A total of 6categories and 14 MVOCs were detected, including higher-concentration MVOCs such as ethanol, acetone, acetic acid, ethyl acetate, isoamyl alcohol and anisole, and lower-concentration MVOCs such as isobutanol, 2-methylbutanol, 2-Furanmethanol, toluene, m-xylene, 1-octene-3-ol, 3-octanol and limonene. The most obvious effects on MVOCs emission were the oxygen content and the growth time, which mainly affected the competitive metabolism of ethanol and acetone. The amounts of acetic acid and ethyl acetate were higher when the oxygen content was lower. There were considerable discrepancies of the types and the quantities of metabolites of Penicillium pinophilum along the growth time. The total amount of MVOCs reached maximum on the 4th~6th day of inoculation. Except acetic acid and limonene, other substances were obviously affected by the growth time. The maximum amount of MVOCs was produced at 25℃, and the minimum was at 35℃. The components of MVOCs were influenced by temperature. The light intensity had no obvious effect on the metabolism of Penicillium pinophilum. Under three experimental temperatures with certain oxygen content and light, the emission intensity of total MVOCs was between 5031and 7650ng/(m²×d), and the contribution of MVOCs concentrations to indoor air ranged from 0.0256 to 444.0380ng/m³.

Key words： Penicillium pinophilum MVOCs HS-SPME-GC-MS influence parameters emission intensity

Received: 25 April 2022

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X172

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	WEN Sheng-chao
	LIU Zhao-rong

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WEN Sheng-chao,LIU Zhao-rong. Characteristics and influencing factors of microbial volatile organic compounds from a common indoor mold[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(11): 5055-5062.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I11/5055

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