室内装修后空气中甲醛浓度的变化趋势

目的 :研究室内装修后空气中甲醛浓度的变化趋势。方法 :选择装修后不同时间段的居民住宅 5 4家和公共场所经营单位 5 2家进行室内空气中甲醛浓度的测定。结果 :甲醛浓度在居民住宅装修 1年之内的超标率为 79.9%～ 85 .4 % ,1年～ 2年之间的超标率为 5 0 .0 % ,2年之后为18.3% ,3个时间段甲醛浓度超标率有显著性差异 (P<0 .0 5 )。公共场所装修半年之内甲醛含量的超标率为 6 5 .5 %～ 81.3% ,半年～ 1年为 36 .84 % ,1年之后 <15 .4 % ,3个时间段甲醛浓度超标率有显著性差异 (P<0 .0 5 )。结论 :室内装修后甲醛浓度随着装修时间的延长而逐渐降低 ,居民住宅大约需要 2年、公共场所大约需要 1年才能达到国家卫生标准。

Variation of concentrations of formaldehyde in the air of indoor after decoration

Objective: To investigate the concentrations of formaldehyde in the air of indoors after decoration. Methods: 54 family houses and 52 public places were selected and examined. Results: Of all that 79.9% ~85.4% could not meet the standard during the 1st year; during the 1 st year to the 2 nd year, 50.0% of them were untargeted; 18.3% of them were under the standard for over two years. There was significant difference among three different periods (P<0.05. Similarly, in public places, the under-standard rates in the air of the concentrations of formaldehyde were 65.5% ~ 81.3% , 36.84% and 15.4% within 6 months, during the 7 th month to the 12 th month and over one year respectively. There was significant difference in different periods (P<0.05). Conclusion: The concentrations of formaldehyde in the air of both living house and public places after decoration were decreased by the time consuming, it takes one or two years to meet the standard in general.