相对湿度对装修后室内空气中甲醛和氨浓度的影响

Effect of Relative Humidity on the Concentrations of Formaldehyde and Ammonia in Indoor Air After Decoration

目的观察相对湿度对装修后室内空气中甲醛和氨浓度的影响。方法选择12个新装修的房间,随机分为3组,每组有4个房间,控制其相对湿度分别为55%,65%,75%。隔日测定甲醛和氨浓度(根据GB/T18204.26-2000、GB/T18204.25-2000),连续观察9d。结果各组房间空气中甲醛和氨浓度随时间的延长均呈逐渐下降趋势。55%,65%和75%湿度组甲醛浓度分别在第5、3、3天以后下降明显,与本组第1天比较,差异均有统计学意义(P<0.05,P<0.05,P<0.01);上述3组房间空气中氨浓度分别在第5、3、3天以后下降明显,与本组第1天比较,差异有统计学意义(P<0.01,P<0.05,P<0.01)。结论室内相对湿度大有利于装饰材料中甲醛和氨的释放。

Objective To observe the effect of relative humidity on indoor concentrations of formaldehyde and ammonia. Methods 12 currently decorated rooms were randomly divided into 3 groups, 4 rooms involved in each, in which the average relative humidity of rooms were 55%,65% and 75% respectively. The concentrations of formaldehyde, ammonia were monitored every two days for 9 consecutive days according to GB/T18204.26 -2000 and GB/T18204.25-2000. Results The concentrations of formaldehyde and ammonia decreased gradually with the prolongation of the experimental period. The concentrations of formaldehyde in the rooms of 55%,65% and 75% relative humidity groups decreased significantly after the 5th, 3rd, 3rd day of the experiment compared with those in the same group at the 1st day of the experiment respectively(P<0.05, P<0.05, P<0.01). The concentrations of ammonia in the rooms of 55%,65% and 75% relative humidity groups decreased significantly after the 5th, 3rd, 3rd day of the experiment compared with those in the same group at the 1st day of the experiment respectively(P<0.01, P<0.05, P<0.01). Conclusion Higher relative humidity may significantly inhibit the release of formaldehyde and ammonia in decorative materials.