郑州市装修后室内空气中甲醛污染调查

目的调查装修后居室空气中甲醛的污染现状并探讨其影响因素。方法选择54户装修时间为1个月至2a的居室为研究对象,选择52栋毛坯楼房为对照,利用化学光度法监测室内空气中甲醛含量。结果装修后相同时间内,高温期的甲醛浓度和低温期的甲醛浓度差异存在显著性(P<0.05),高温期甲醛浓度平均为低温期的6.8倍,复杂装修带来甲醛污染较简单装修严重,经过近2a的通风换气,两个跟踪家庭的甲醛平均浓度分别由2.03、0.46mg/m3降至0.21、0.18mg/m3。结论装修后室内空气中的甲醛污染相当严重,正常通风条件下,影响室内甲醛含量的因素主要是装修材料的质量、用量、装修时间和室内温度,保持良好的通风有利于甲醛的释放,可有效地减轻居室内甲醛的污染程度。

Study on Formaldehyde Pollution in Indoor Air of the Newly Decorated House

Objective To investigate the status quo of formaldehyde pollution in indoor air of the decorated houses. Methods 54 apartments that have been decorated for one month to almost two years and 52 roughcast apartments were selected and the concentrations of formaldehyde were determined by acetylacetone spectrophotometry. Results The results showed that in the same time after decorating, there was significant difference of formaldehyde concentrations between higher and lower temperature periods (P<0.05). The average level of formaldehyde under higher temperature conditions was 6.8 times as much as the lower temperature conditions. The formaldehyde pollution of complexly decorated rooms was much heavier than the simply ones. Having been draughted for nearly two years the formaldehyde levels in two houses were determined during different time after decoration and the formaldehyde levels dropped from 2.03 mg/m3 and 0.46 mg/m3 to 0.21 mg/m3 and 0.18 mg/m3 respectively. Conclusion The main factors influencing formaldehyde content in indoor air included the quality and the amount of decorating material, time after decoration and indoor temperature. Good airiness was in favor of formaldehyde releasing.