武汉市室内装修后甲醛浓度动态变化规律研究

Dynamic Change of Formaldehyde Concentration in Indoor Air after Newly Decorated in Wuhan

目的了解武汉市新装修居室空气中甲醛的污染情况及其动态变化规律和室内装修装饰材料的构成。方法于2005年4月,选择武汉市新装修的66户住户,连续6个月监测室内空气中的甲醛浓度,同时对室内装饰材料的构成做相关调查。结果武汉市新装修居室空气中甲醛浓度在第4次监测(7月)时达到峰值,其平均浓度为0.272mg/m3,超过国家卫生标准(0.1mg/m3)1.72倍,此后甲醛浓度随时间的延长而逐渐降低。6个月后,仍有近30%的住户室内空气甲醛浓度超标。人造板材占家具和门窗、墙面等装修材料构成的81.48%,成为室内空气甲醛污染的主要来源。结论新装修居室空气中甲醛浓度的降低是一个长期缓慢的过程。大量使用易挥发甲醛的装饰材料(人造板材)造成新装修居室空气中甲醛污染严重。

Objective To study indoor air pollution by formaldehyde and the dynamic change of formaldehyde concentration in newly decorated apartments. Methods 66 newly decorated apartments were selected and the concentration of formaldehyde was determined for 7 times in 6 consecutive months and the materials for decoration were investigated at the same time. Results 81.48% of the wood-based board and 94.63% of the solvent, paints used in the decoration could release formaldehyde. The concentration of formaldehyde in the indoor air reached the peak at the fourth determination, the average concentration was 0.272 mg/m^3, higher than the national standard limit （0.1 mg/m^3） and then deereased apparently with the prolongation of the time after the decoration. About 30% of apartments, formaldehyde concentration were still higher than the national standard limit half a year after decoration. Conclusion The decorative materials （wood -based board） which may release formaldehyde are over used and as a result, indoor air formaldehyde pollution is serious in newly decorated apartments in Wuhan.