In this work, the objectives were to provide a scientific basis for environmental governance and to ensure staff health by real-time monitoring of indoor air quality of the pathology department. Using eagle eye enviro...In this work, the objectives were to provide a scientific basis for environmental governance and to ensure staff health by real-time monitoring of indoor air quality of the pathology department. Using eagle eye environment monitor to make a real-time dynamic monitoring of the air quality of the pathological technical room for 30 days, the paper records the monitoring data of PM 2.5, PM 10, formaldehyde, CO2, total volatile organic compounds (TVOC) every day at Beijing time 3 a.m, 10 am, 1 pm, 4 pm, and 10 pm, and makes a summarization and analysis. The average value of CO2 concentration of the 5 time points is (0.05 ± 0.01)%, and each time point concentration are different (P 0.05);the average TVOC concentration of the 5 time points is (0.08 + 0.31) mg/m3. They are all different between the concentration at each time point (P 2 and NO are not checked out. Through the real-time online monitoring of the pathology room, we find that the formaldehyde concentration of different time periods is far more than the safety value standard, and the concentration of formaldehyde, CO2, PM 2.5, PM 10 and total volatile organic compound (TVOC) is different at different time periods, and the concentrations at working time are higher than the non-working time. We must take effective measures to control the concentration of harmful gases in order to ensure the staff’s health.展开更多
There is a growing need in public health to conduct large-scale epidemiological studies to investigate the health effects of fine particulate matter(PM_(2.5))exposure levels.In response to this need,we developed a rea...There is a growing need in public health to conduct large-scale epidemiological studies to investigate the health effects of fine particulate matter(PM_(2.5))exposure levels.In response to this need,we developed a real-time personal PM_(2.5)exposure monitoring system(PEPS:Personal Exposure PM_(2.5)System),which is capable of monitoring personal exposure concentration and uploading data in real time.The air quality self-labelling device,specifically customized for the PEPS,can be worn on the body and features functions for real-time data automatic upload,data storage,data export,and localization.This system enables researchers to obtain the big data of personal PM_(2.5)exposure concentration at low cost,with minimal manpower and technical requirements.It has been utilized to investigate the personal exposure levels of PM_(2.5)among college students in Beijing,China,providing a substantial volume of valuable data for indoor air quality and related epidemiological study.The maximum difference between the monitored daily average exposure concentration and the outdoor concentration was 265µg/m^(3),corresponding to a relative error of 1579.5%.The correlation analysis of 11 factors showed that the correlation between exposure concentration and outdoor concentration was as high as 0.66(p<0.001),and the correlation between exposure concentration and other certain factors was in the range of[−0.11,−0.03].展开更多
The World Health Organization has raised concerns about the possibility of airborne transmission in enclosed and poorly ventilated areas.Therefore,rapid monitoring of airborne viruses is necessary in multi-use facilit...The World Health Organization has raised concerns about the possibility of airborne transmission in enclosed and poorly ventilated areas.Therefore,rapid monitoring of airborne viruses is necessary in multi-use facilities with dense population.Accordingly,an electrostatic air sampler(250 L/min)was developed in this work to obtain indoor viral aerosol samples for analysis via the Polymerase Chain Reaction(PCR).Aerosol tests with H1N1 and HCoV-229E were performed to evaluate the sample collection efficiency.PCR analysis,along with another aerosol test,was conducted to evaluate the recovery of the virus particles collected by the sampler.In laboratory tests,our electrostatic sampler obtained viral samples that were detectable by PCR under the simulated viral pandemic scenario(3000 RNA copies per cubic meter of air)within 40 min.The resulting cycle threshold(C)values were 35.07 and 37.1 for H1N1 and HCoV-229E,respectively.After the performance evaluation in the laboratory,field tests were conducted in a university classroom from October 28 to December 2,2022.Influenza A and HCoV-229E were detected in two air samples,and the corresponding C,values were 35.3 and 36.8.These PCR results are similar to those obtained from laboratory tests,considering the simulatedviralpandemic scenario.展开更多
文摘In this work, the objectives were to provide a scientific basis for environmental governance and to ensure staff health by real-time monitoring of indoor air quality of the pathology department. Using eagle eye environment monitor to make a real-time dynamic monitoring of the air quality of the pathological technical room for 30 days, the paper records the monitoring data of PM 2.5, PM 10, formaldehyde, CO2, total volatile organic compounds (TVOC) every day at Beijing time 3 a.m, 10 am, 1 pm, 4 pm, and 10 pm, and makes a summarization and analysis. The average value of CO2 concentration of the 5 time points is (0.05 ± 0.01)%, and each time point concentration are different (P 0.05);the average TVOC concentration of the 5 time points is (0.08 + 0.31) mg/m3. They are all different between the concentration at each time point (P 2 and NO are not checked out. Through the real-time online monitoring of the pathology room, we find that the formaldehyde concentration of different time periods is far more than the safety value standard, and the concentration of formaldehyde, CO2, PM 2.5, PM 10 and total volatile organic compound (TVOC) is different at different time periods, and the concentrations at working time are higher than the non-working time. We must take effective measures to control the concentration of harmful gases in order to ensure the staff’s health.
基金supported by the Research Fund,Vanke School of Public Health,Tsinghua University(2024JC002).
文摘There is a growing need in public health to conduct large-scale epidemiological studies to investigate the health effects of fine particulate matter(PM_(2.5))exposure levels.In response to this need,we developed a real-time personal PM_(2.5)exposure monitoring system(PEPS:Personal Exposure PM_(2.5)System),which is capable of monitoring personal exposure concentration and uploading data in real time.The air quality self-labelling device,specifically customized for the PEPS,can be worn on the body and features functions for real-time data automatic upload,data storage,data export,and localization.This system enables researchers to obtain the big data of personal PM_(2.5)exposure concentration at low cost,with minimal manpower and technical requirements.It has been utilized to investigate the personal exposure levels of PM_(2.5)among college students in Beijing,China,providing a substantial volume of valuable data for indoor air quality and related epidemiological study.The maximum difference between the monitored daily average exposure concentration and the outdoor concentration was 265µg/m^(3),corresponding to a relative error of 1579.5%.The correlation analysis of 11 factors showed that the correlation between exposure concentration and outdoor concentration was as high as 0.66(p<0.001),and the correlation between exposure concentration and other certain factors was in the range of[−0.11,−0.03].
基金This research was supported by the Korea Environment Industry and Technology Institute(KEITI)through the Technology Development Project for Biological Hazards Management in Indoor Air,funded by the Korea Ministry of Environment(MOE)(No.2021003370005)。
文摘The World Health Organization has raised concerns about the possibility of airborne transmission in enclosed and poorly ventilated areas.Therefore,rapid monitoring of airborne viruses is necessary in multi-use facilities with dense population.Accordingly,an electrostatic air sampler(250 L/min)was developed in this work to obtain indoor viral aerosol samples for analysis via the Polymerase Chain Reaction(PCR).Aerosol tests with H1N1 and HCoV-229E were performed to evaluate the sample collection efficiency.PCR analysis,along with another aerosol test,was conducted to evaluate the recovery of the virus particles collected by the sampler.In laboratory tests,our electrostatic sampler obtained viral samples that were detectable by PCR under the simulated viral pandemic scenario(3000 RNA copies per cubic meter of air)within 40 min.The resulting cycle threshold(C)values were 35.07 and 37.1 for H1N1 and HCoV-229E,respectively.After the performance evaluation in the laboratory,field tests were conducted in a university classroom from October 28 to December 2,2022.Influenza A and HCoV-229E were detected in two air samples,and the corresponding C,values were 35.3 and 36.8.These PCR results are similar to those obtained from laboratory tests,considering the simulatedviralpandemic scenario.
