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差异有显著性 (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年之后小于 15 .4 % ,3个时间段甲醛浓度超标率差异有显著性 (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 ,居民住宅约需 2年 ,公共场所需 1年才能达到国家卫生标准

VARIATION OF FORMALDEHYDE CONCENTRATIONS IN INDOOR AIR AFTER DECORATION

Objective:To study the variation of formaldehyde concentrations in indoor air of newly decorated.Methods:54 families and 52 public places with indoor decoration were selected to be monitored in different stages.Results:The over standard rate for the air formaldehyde sample was from 79.9% to 85.4% during one year after the tenements were decorated.50.0% during the period from the first year to the next year and the over standard rate for the air formaldehyde sample was18.3% after the tenements were decorated for two years.There was significant difference in the rate among three different periods (P<0.05).The over standard rate for the air formaldehyde sample was from 65.5% to 81.3% within 6 months after the public places were decorated.36.84% during the period from the 7th month to the 12th month and the over standard rate for the air formaldehyde sample was lower than 15.4% after the public places were decorated for one year.There was significant difference in the rate among three different periods (P<0.05).Conclusion:During the course of monitoring formaldehyde concentrations in indoor decreased apparently with the prolongation of the duration after the end of the decoration.The formaldehyde concentrations did not reach the standard until the tenements were decorated for two years and the formaldehyde concentrations reached the standard after the public places were decorated for one year.