Water vapour mobilises building related non-volatile chemicals and mycotoxins and may be used to remove substances of potential healthhazard from indoor surfaces

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Researchers

Research units

  • University of Helsinki

Abstract

No inhalation toxicity assessment (H314) is currently required of non-volatile substances (European REACH). However, our study shows that non-volatiles can mobilise into humid air. Aerosolisation of potentially hazardous, medium to large molecular-size (300- 1500 g/mol) substances relevant to indoor air quality were studied in glass test chambers. The test substances, which are classified non-volatile based on their large molecular structure and lack of vapour pressure data, were: I) toxins of building colonizing moulds, 2) biocidal cationic antimicrobials, and 3) non-ionic tenside and wetting agent polyoxyethylene isotridecanol ether, widely used in building materials and a major constituent of indoor cleaning formulations.
Each test substance (0.9 - 30 mg) was dosed on a glass tray, placed on the chamber floor. Humidity was controlled by a humidifier and a dehumidifier and intermittent ventilation. Humidity-driven mobilisation of the non-volatile substances transferred the substances from the tray into chamber air, where it was detected with TVOC sensors. The water vapour was condensed in the dehumidifier, where the test substances could be detected using capillary electrophoresis analyser.
Humidification and dehumidification and ventilation removed the test substances from the trays. This protocol could be applied to contaminated indoor spaces during low activity hours to reduce human exposure the adverse substances.

Details

Original languageEnglish
Title of host publicationRoomvent&Ventilation 2018 : Excellent Indoor Climate and High Performing Ventilation
EditorsRisto Kosonen, Mervi Ahola, Jarkko Narvanne
Publication statusPublished - 2 Jun 2018
MoE publication typeA4 Article in a conference publication
EventRoomvent & Ventilation
- Espoo, Finland
Duration: 2 Jun 20185 Jun 2018

Conference

ConferenceRoomvent & Ventilation
CountryFinland
CityEspoo
Period02/06/201805/06/2018

    Research areas

  • indoor air, wetting agent, alcohol polyethoxylate, Genapol, cleaning agent, quaternary ammonium, polyguanide, PHMG, PHMB, antimicrobial, ochratoxin A, mycotoxin, vaporisation, VOC sensors, capillary electrophoresis

ID: 27984809