室内空气中二氧化碳变化趋势及现状调查

Survey on the Variation Trend and the Status of Carbon Dioxide Concentrations in Indoor Air

目的研究目前居室内空气中二氧化碳浓度变化趋势及现状,为《室内空气中二氧化碳卫生标准》的修订提供依据。方法收集安徽省8个市近5年二氧化碳监测数据,并选择不同类型居室进行二氧化碳浓度的现场监测,对所有获得数据作统计学分析。结果2004~2008年居室内二氧化碳浓度总均值0.066%。现场不同居室内二氧化碳浓度监测结果：城市办公室均值为0.057%,城市居民住宅卧室与厨房均值分别为0.058%、0.054%,城镇居民住宅卧室与厨房均值分别为0.052%、0.052%。结论建议新修订的《室内二氧化碳卫生标准》增加＂小时最高容许浓度＂,日平均最高容许浓度保持不变或降低到0.09%。

Objective To study the variation trend and the status of carbon dioxide（CO2） concentration in indoor air,and provide evidence for the revision of Hygienic Standard for CO2 in indoor air.Methods The monitoring data of CO2 during the last 5 years of 8 cities in Anhui were collected.Different types of rooms were selected to monitoring CO2 concentration,and the monitoring data were analyzed.Results The annual average concentration of CO2 from 2004 to 2008 was 0.066%.The monitoring data showed that the average concentration of CO2 in offices was 0.057%.For the urban residents,the average concentrations were 0.052% in bedroom and 0.054% in their kitchen respectively.For urban and township residents,the average value in bedroom and kitchen were all 0.052%.Conclusion We recommend one-hour maximum allowable concentration should be added to the newly revised Hygienic Standard for CO2 in indoor air,and daily average maximum allowable concentration remains unchanged or is reduced to 0.09%.