Primary pollutants in schoolchildren's homes in Wuhan, China

Cai, Wei; Yokota, Hiroshi; Yanagi, U; Hasegawa, Kenichi; Kagi, Naoki; Chen, Mingqing

doi:10.1016/j.buildenv.2015.02.028

Cited by 36 publications

(25 citation statements)

References 42 publications

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“…However, the air change rates and CO 2 concentrations are distributed similarly to those reported in previous Chinese studies for the same seasons and the same climate zones . Our measured air change rates may thus validly characterize air change rates for Chinese residences.…”

Section: Discussionmentioning

confidence: 94%

Air change rates in urban Chinese bedrooms

et al. 2019

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The ventilation modalities in most Chinese residences are infiltration and opening windows. We measured infiltration rates and air change rates at night, with no attempt to change occupants' behaviors, of urban residences in five climate zones of China during four seasons. Using the CO 2 decay method, we found the median infiltration rate for 294 residences to be 0.34 h −1 . Using occupant-generated CO 2 as tracer gas, we determined air change rates over the course of 1 year in 46 bedrooms at night from mass balance considerations. In 54% of the measurements, windows were closed, so ventilation was only by infiltration. Windows were mainly closed when the outdoor temperature was below 15°C and above 26°C. The median infiltration rates did not differ appreciably among seasons and climate zones and were always less than 0.45 h −1 .

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Section: Discussionmentioning

confidence: 94%

Air change rates in urban Chinese bedrooms

et al. 2019

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“…The maximum HCHO concentration in all investigated houses was generally lower than the current guideline (100 μg/m 3 ) provided by the Chinese national standards [ 56 ] except in one living room in Dalian (101.7 μg/m 3 ). The highest concentration in Beijing, Shanghai, Wuhan and Changsha was 42.6 μg/m 3 , 31.1 μg/m 3 [ 46 ], 45.2 μg/m 3 [ 47 ] and 11.4 μg/m 3 , respectively, lower than half of the limit.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, in residential buildings, which are the most likely centres for children’s daily after school activities, chronic air pollutant exposure, in such circumstances as described above, may provide a negative health impact, particularly for the more clinically susceptible. Further data was collected via a systematical investigative study, composed of a questionnaire survey and field investigation related to environmental conditions was then conducted in several major Chinese cities, including Harbin, Dalian [ 44 ], Beijing [ 45 ], Shanghai [ 46 ], Wuhan [ 47 ] and Changsha [ 48 ]. This study included two stages: (1) cross-sectional questionnaire survey concerning residential characteristics and lifestyles, (2) a detailed field investigation of the environmental conditions of the schoolchildren’s households.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Indoor Air Pollution and Childhood Allergies in Households in Six Chinese Cities by Subjective Survey and Field Measurements

et al. 2017

IJERPH

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Greater attention is currently being paid to the relationship between indoor environment and childhood allergies, however, the lack of reliable data and the disparity among different areas hinders reliable assessment of the relationship. This study focuses on the effect of indoor pollution on Chinese schoolchildren and the relationship between specific household and health problems suffered. The epidemiological questionnaire survey and the field measurement of the indoor thermal environment and primary air pollutants including CO2, fine particulate matter (PM2.5), chemical pollutants and fungi were performed in six Chinese cities. A total of 912 questionnaires were eligible for statistical analyses and sixty houses with schoolchildren aged 9–12 were selected for field investigation. Compared with Chinese national standards, inappropriate indoor relative humidity (<30% or >70%), CO2 concentration exceeding 1000 ppm and high PM2.5 levels were found in some monitored houses. Di(2-ethylhexyl) phthalate (DEHP) and dibutyl phthalate (DBP) were the most frequently detected semi-volatile organic compounds (SVOCs) in house dust. Cladosporium, Aspergillus and Penicillium were detected in both indoor air and house dust. This study indicates that a thermal environment with CO2 exceeding 1000 ppm, DEHP and DBP exceeding 1000 μg/g, and high level of PM2.5, Cladosporium, Aspergillus and Penicillium increases the risk of children’s allergies.

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“…Under the same concentration, house dust particulate matters pollution was more harmful to the human body (Dockery et al, 1993;Pope et al, 2002;Guo et al, 2010;Tinker and Roberts, 1999). House dust particulate matters can enter the lungs to made greater harm to human body (Wang et al, 2013;Wang et al, 2007;Nikasinovic et al, 2006;Neas et al, 1994;Delfino et al, 2006;Zhu et al, 2015). A growing number of epidemiological studies had shown that population incidence and mortality were associated with the particle mass concentration, especially significantly the indoor particulate matter concentrations (Yang, 2014;Dockery et al, 1993;Pope et al, 2002;Guo et al, 2010;Tinker and Roberts, 1999;Wang et al, 2013;Wang et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Human Walking on Distribution Characteristics of Indoor Particulate Matter

Lv¹,

Wang²,

Yoshino³

et al. 2018

Healthy, Intelligent and Resilient Buildings and Urban Environments

Self Cite

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In modern society, house dust particulate matters pollution had become serious. Ventilation is an important method for removing house dust particulate matters and it is very important to explore the removal efficiency of house dust particulate matters under different ventilation modes. This study analyses the removal effect of house dust particulate matters under the two typical ventilation modes called ceiling exhaust and slit exhaust strategy through experiments and date analysis. In the process of experiments, riboflavin particles were used as the house dust particulate matters, instantaneous microbial detection (IMD) was used to measure the house dust particulate matters. Walking test was carried on after the ventilation system running for some time, which aimed to explore the influence of human behaviour on the house dust particulate matters distribution under two different ventilation modes. It is concluded that larger size particles had larger sedimentation velocity and sedimentation velocity of particles would be faster significantly after the ventilation system working. After walking experiment, particles concentration returned to background concentrations due to the effect of the ventilation system. Particles concentration in slit exhaust strategy was lower than ceiling exhaust so that the effect of slit exhaust strategy is superior to the ceiling exhaust.

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Primary pollutants in schoolchildren's homes in Wuhan, China

Cited by 36 publications

References 42 publications

Air change rates in urban Chinese bedrooms

Air change rates in urban Chinese bedrooms

Investigation on Indoor Air Pollution and Childhood Allergies in Households in Six Chinese Cities by Subjective Survey and Field Measurements

The Effect of Human Walking on Distribution Characteristics of Indoor Particulate Matter

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