Experimental tests of CAM plants and hydrogels for outdoor air pollutant filtration systems

Ghayda Alhabib, Sandra Bernal, Aletheia Ida, Altaf Engineer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Water and plants absorb 55% of the carbon dioxide and pollutants introduced by humans into the atmosphere (Riebeek, 2011). This study hypothesizes that outdoor air filtration systems consisting of combinations of specific plants and saturated hydrogels are effective in increasing indoor air quality (IAQ) by decreasing airborne pollutants coming in via outdoor urban environments. Various plant types are analyzed to compare their efficiency in reducing air pollutants. From these, the Crassulacean Acid Metabolism (CAM) type plants were found to be the most efficient. Saturated hydrogels configured in a matrix to allow air to pass through were also found to absorb volatile organic compounds (VOCs) and particulate matter (PM10 and PM2.5). The study was conducted in a hot arid climate in Tucson, Arizona, USA. The results revealed a lowering of dry-bulb temperature in the daytime hours via evaporative cooling, an increase in relative humidity levels to 46% on average, and reduction in daytime levels of VOCs, CO2, and PM10 and PM2.5. This study, therefore, has significant implications for the future design of outdoor air filtration systems that can be combined with natural ventilation strategies for optimum IAQ.

Original languageEnglish (US)
Title of host publication16th Conference of the International Society of Indoor Air Quality and Climate
Subtitle of host publicationCreative and Smart Solutions for Better Built Environments, Indoor Air 2020
PublisherInternational Society of Indoor Air Quality and Climate
ISBN (Electronic)9781713823605
StatePublished - 2020
Event16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020 - Virtual, Online
Duration: Nov 1 2020 → …

Publication series

Name16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020

Conference

Conference16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020
CityVirtual, Online
Period11/1/20 → …

Keywords

  • Air quality monitoring
  • CAM plants
  • Hydrogel filters
  • Indoor air quality (IAQ)
  • Natural ventilation

ASJC Scopus subject areas

  • Building and Construction
  • Computer Science Applications
  • Health, Toxicology and Mutagenesis
  • Pollution

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