Author(s)

Xiaojun Liang¹, Baoying Zhang², Kewei Wang³, Xinyi Ji⁴, Zhengxiang Geng¹, Cheng’e Chen^5*

¹Environmental Health Department, Kunshan Center for Disease Control and Prevention, Kunshan, China.
²China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China.
³Wuxi Medical School, Jiangnan University, Wuxi, China.
⁴Health Inspection Department, Kunshan Center for Disease Control and Prevention, Kunshan, China.
⁵Medical Oncology Department, Traditional Chinese Medicine Hospital of Kunshan, Kunshan, China.

40 newly decorated residences in Kunshan city were selected and investigated. Formaldehyde concentrations were detected in the winter (January to February) and summer (July to August) respectively in 2019. A total of 324 indoor air samples were collected from 162 sampling sites. The average formaldehyde concentration was (0.0219 ± 0.0119) mg/m³ and (0.0963 ± 0.1072) mg/m³ in winter and summer respectively, the concentration in summer is higher than in winter with a significant difference (Z = -5.484, P < 0.001). The unqualified rate was 0.0% and 28.3% in winter and summer respectively, the maximum value in summer was 1.0403 mg/m³, 10.4 times higher than the relevant standard. The seasonal formaldehyde distributions were not different by type of residence, residence grade, bedroom number, decoration style, floor space, decoration costs, whether occupancy at detection and heating mode (P > 0.05). The formaldehyde concentrations in summer were different between types of rooms (H = 8.800, P = 0.030) and whether most furniture was new (Z = 9.259, P < 0.001). Formaldehyde concentration was positively correlated with temperature in winter and summer (winter: r = 0.288, summer: r = 0.151, P < 0.05), negatively with humidity in Winter (r = -0.243, P < 0.05), but not correlated with humidity in summer (P = 0.841). The average days from complete decoration to formaldehyde detection were 130.1 and 303.3 d in winter and summer. It was not found that the formaldehyde concentration decreased with the extension of days after renovation in the two seasons (P > 0.0.05).

Newly Decorated, Residential Houses, Formaldehyde Concentration, Influencing Factors

Liang, X. , Zhang, B. , Wang, K. , Ji, X. , Geng, Z. and Chen, C. (2022) Indoor Formaldehyde Pollution and Its Influencing Factors of Newly Decorated Residential Buildings in Kunshan City, Jiangsu Province. Current Urban Studies, 10, 263-274. doi: 10.4236/cus.2022.102016.