PM_2.5 Concentrations Indoors and Outdoors in Heavy Air Pollution Days in Winter

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• 作者：Peiyao Song ; Lixin Wanga ; ^{wanglixin@bucea.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yang Hui ; Rui Li
• 关键词：PM2.5 ; Indoors ; Air pollution ; I/O ratio ; pattern of activity
• 刊名：Procedia Engineering
• 出版年：2015
• 出版时间：2015
• 年：2015
• 卷：121
• 期：Complete
• 页码：1902-1906
• 全文大小：399 K

文摘

The epidemiological studies have indicated that PM_2.5 can increase morbidity and mortality, damage the respiratory system and the cardiovascular system, and affect the immune function. The objectives of this study are to understand PM_2.5 pollution status in the households when the heavy air pollution occurs in the winter and the correlation of indoor PM_2.5 pollution with outdoor, and to find out the effect of indoor human activities on the changes of indoor PM_2.5 concentrations. Indoor PM_2.5 concentrations were measured using CLH-2000 portable PM_2.5 detector in the four households in December 7-8, 2013. When sampling indoors, the pattern of activity questionnaire was completed. The results showed that the average of indoor PM_2.5 concentration is in the range of 112-416 μg/m³, and the pollution level is more serious at 4 homes in Beijing in winter. Outdoor pollution, human activities and behaviors are the sources of indoor PM_2.5 at homes. Human activities (cooking, smoking and cleaning) have more contribution to indoor PM_2.5 than outdoor pollution. In general, the effect of indoor human activities on PM_2.5 concentration is stronger than outdoor pollution and air cleaner.