银川市部分新装修住宅甲醛污染及变化规律分析

Investigation of Formaldehyde Pollution in Some Newly Decorated Houses in Yinchuan,Ningxia

目的了解居民住宅新装修后不同时间段室内甲醛浓度动态变化规律。方法选取银川市装修水平相近、装修规格相近且档次相近的居民住宅83户,按照装修后0～1、3、6、12个月各时间段进行室内空气甲醛浓度追踪调查。结果甲醛浓度在装修后4个时间段的超标率分别为95%,73%,41%,28%。装修12个月后,每天通风4 h以上的居室甲醛浓度为(0.11±0.07)mg/m3,通风不足4 h的居室甲醛浓度为(0.16±0.09)mg/m3,差异有统计学意义(P<0.05)。装修后各时间段不同功能房间甲醛超标率不同,装修12个月后主卧超标率为37%,次卧为24%,厨房为21%,客厅为17%。结论居民新装修住宅室内甲醛污染较严重。装修后随时间的延长,超标率呈下降趋势。

Objective To understand the dynamic changes on indoor formaldehyde concentration of newly decorated houses. Methods A total of 83 newly decorated houses with similar decoration level and similar decoration specifications were selected ,and the concentration of indoor formaldehyde was monitored 0-1 months, 3 months, 6 months, 12 months after the decoration finished. Results The unqualified rates of formaldehyde concentration for four periods of decoration finished were 95%, 73%, 41% and 28%; The concentration of formaldehyde was affected b~, ventilation, the concentration of indoor formaldehyde of long ventilation was significantly lower than that of short ventilation （P〈0.05）. The formaldehyde concentration of long time ventilation was significantly lower （P〈0.05）. 12 monthS after decoration finished, the mean concentration for more than 4 hours ventilation was （0.11 ±0.07） mg/m3, and that of less than 4 hours ventilation was （0.16±0.09） mg/m3, and as for the bedrooms, they were 37%, 24%, it was 21% for kitchen, and 17% for living room. Conclusion Formaldehyde pollution is more serious in newly decorated houses in Yinchuan, Ningxia, the ventilation is indispensable to reduce indoor formaldehyde concentration after the decoration finished.