西安市地下商场甲醛和TVOC污染水平与来源分析

OCCURRENCE AND POLLUTION SOURCE OF FORMALDEHYDE AND TVOC IN UNDERGROUND STORES IN XI'AN CITY

为了解西安市地下商场室内甲醛和TVOC污染水平及来源。采用Z-300XP型便携式甲醛检测仪和Mini 3000型手持式VOCs气体检测仪对该市9个地下商场室内甲醛和TVOC质量浓度进行监测,并对地下商场内甲醛和TVOC的影响因素进行分析。结果显示西安市地下商场室内甲醛和TVOC质量浓度严重超标;各监测地下商场内甲醛和TVOC的平均质量浓度分别为0.05～0.26,0.34～3.56 mg/m^3;6个地下商场的甲醛质量浓度超标,超标率为66.7%;7个地下商场的TVOC质量浓度超标,超标率为77.8%。大型地下商场内的甲醛和TVOC质量浓度污染比中小型地下商场的更为严重;室内装修和销售的商品是地下商场内甲醛和TVOC的主要来源,同时说明地下商场内的通风换气量严重不足。

In order to explore the occurrence and pollution source of formaldehyde and TVOC in underground stores in Xi＇an,a portable formaldehyde gas detector（ Z-300XP） and a portable VOCs gas detector（ Mini 3000） were used to measure indoor formaldehyde and TVOC concentration of 9 underground stores in Xi＇ an city,and analyze the affecting factors of indoor formaldehyde and TVOC in underground stores. The results showed that pollution of formaldehyde and TVOC in indoor air of underground stores is serious; the mean concentration of formaldehyde and TVOC of each monitoring underground stores were0. 05 ～ 0. 26 mg / m^3 and 0. 34 ～ 3. 56 mg / m^3; there are 6 underground stores with formaldehyde and 7 underground stores with TVOC concentration exceeding the standard,limit and the exceeding rate reaches 66. 7% and 77. 8%,respectively. The concentration of formaldehyde and TVOC pollutions are more serious in oversize underground stores than those in smaller underground stores; the formaldehyde and TVOC pollution in indoor air of underground stores mainly come from decoration and merchandises sold,and this illustrate that the ventilation volume are not enough in the underground stores.