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Particulate matter and carbon dioxide in classrooms - the impact of cleaning and ventilation.

Abstract：

UNLABELLED:The objective of the study was to measure the indoor air quality in classrooms with special emphasis on particulate matter (PM 10) and carbon dioxide (CO(2)) and the impact of cleaning and ventilation. MATERIAL AND METHOD:PM 10 was analysed via gravimetric method and by laser beam technology. CO(2) was analysed by infrared sensors. Measurements were collected for 3 weeks; first week: "normal" cleaning (twice a week) and ventilation; second week: intensified cleaning (five times a week); third week: intensified cleaning and intensified ventilation. RESULTS:Levels of PM 10 in the classrooms during the 3 weeks were 69+/-19microg/m(3) and they were dominated by occupancy and the persons' activity. Intensified cleaning showed a significant decrease in all classrooms (79+/-22 to 64+/-15microg/m(3)). The effect of ventilation on levels of PM10 was inconsistent - levels of CO(2) were very high in all schools and could be diminished by intensified ventilation (mean 1459 to 1051ppm). CONCLUSION:Although further investigation is needed to study detailed characteristics of the PM 10 (size distribution, chemical identity) the data are sufficient to improve the cleaning and the ventilation in schools.

journal_name

Int J Hyg Environ Health

journal_title

International journal of hygiene and environmental health

authors

Heudorf U,Neitzert V,Spark J

doi

10.1016/j.ijheh.2007.09.011

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

45-55

issue

1

eissn

1438-4639

issn

1618-131X

pii

S1438-4639(07)00169-1

journal_volume

212

pub_type

杂志文章

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