• HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
Friday, August 1, 2025
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
  • HOME
  • NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • INSTAGRAM
    • TWITTER
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Health

Study helps to better understand the link between indoor and outdoor air quality

Bioengineer by Bioengineer
May 7, 2021
in Health
Reading Time: 2 mins read
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram

IMAGE

Credit: Junyao Li

People spend about 80-90% of their time indoors. Compared to outdoor air quality, the indoor air quality is more relevant to people’s health. Therefore, understanding the levels, sources and evolution of particulate matter (PM) indoors is important for the accurate evaluation of people’s health risks to aerosol exposure.

A research team led by Prof. Yele Sun from the Institute of Atmospheric Physics (IAP) of the Chinese Academy of Sciences deployed a time-of-flight aerosol chemical speciation monitor (ToF-ACSM) to measure time series and mass spectra of non-refractory species in a typical academic office in IAP. The study was published in Indoor Air.

The researchers measured the concentration and chemical composition of indoor PM2.5 for one month along with simultaneous measurements outdoors. They also performed the open-close window and the dampness experiments in order to figure out the mechanism of indoor/outdoor air exchange, and the influence of increased humidity on the indoor PM2.5.

They found that the indoor aerosol species were primarily from outdoor air exchange. “The indoor and outdoor variation trends are similar for most of aerosol species,” said Prof. Sun, “However, the chemical compositions of PM2.5 are different. The concentration of organic aerosol from fossil fuel combustion and ammonium nitrate decreases because they evaporate or turn from particle to gas upon indoor transport when the indoor temperature is much higher than the outside in winter.”

It is often believed that opening windows to ventilate can improve the indoor air quality. However, according to this newly published study, the PM mass concentration outdoors is significantly higher than that in the office. Elevated natural ventilation will increase PM exposure indoors instead, and this increased exposure might be prolonged when outdoor PM got cleared up. “So it’s not a good idea to open windows when the air quality is not good outdoors.” Said Prof. Sun.

The team also investigated the effect of air humidifiers, which are widely used to increase the indoor humidity. Prof. Sun said, “The increase of indoor relative humidity could lead to a significant increase in PM2.5 mass concentration, especially for organic aerosol. The increase is likely due to the partitioning of hygroscopic organic species from gas phase to particle phase in indoor air.”

“Better understanding of the links between indoor and outdoor air quality will be needed in the future, as well as a more quantitative assessment of human exposure risks indoors,” said Sun.

###

Media Contact
Ms. Zheng Lin
[email protected]

Original Source

http://english.iap.cas.cn/home/News/202105/t20210506_268959.html

Related Journal Article

http://dx.doi.org/10.1111/ina.12838

Tags: Atmospheric ScienceEcology/EnvironmentEnvironmental HealthPollution/Remediation
Share12Tweet8Share2ShareShareShare2

Related Posts

blank

Breakthrough Discovery in Brain Receptors Could Revolutionize Next-Generation Mental Health Treatments

August 1, 2025
blank

Niclosamide Nanohybrid Trial for Mild-Moderate COVID-19

August 1, 2025

HADHA Controls JAK/STAT3 in Glioblastoma via Metabolism

August 1, 2025

Study Finds Medicare Could Cut $3.6 Billion in Costs Without Impacting Older Adults

August 1, 2025
Please login to join discussion

POPULAR NEWS

  • Blind to the Burn

    Overlooked Dangers: Debunking Common Myths About Skin Cancer Risk in the U.S.

    60 shares
    Share 24 Tweet 15
  • Dr. Miriam Merad Honored with French Knighthood for Groundbreaking Contributions to Science and Medicine

    46 shares
    Share 18 Tweet 12
  • Study Reveals Beta-HPV Directly Causes Skin Cancer in Immunocompromised Individuals

    37 shares
    Share 15 Tweet 9
  • Sustainability Accelerator Chooses 41 Promising Projects Poised for Rapid Scale-Up

    35 shares
    Share 14 Tweet 9

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Recent News

Breakthrough in Melanoma Guidance System Offers New Hope to Halt Metastasis

SFU Researchers Unveil Innovative Tool for Enhanced Blender-Style Lighting Control in Photographs

Breakthrough Discovery in Brain Receptors Could Revolutionize Next-Generation Mental Health Treatments

  • Contact Us

Bioengineer.org © Copyright 2023 All Rights Reserved.

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

Bioengineer.org © Copyright 2023 All Rights Reserved.