Overview of HOMEChem: House Observations of Microbial and Environmental Chemistry

Author(s): D. K. Farmer ¹ ^, ² ^, ³ ^, ⁴ , M. E. Vance ⁵ ^, ⁶ ^, ⁷ ^, ⁸ , J. P. D. Abbatt ¹ ^, ⁹ ^, ¹⁰ ^, ¹¹ , A. Abeleira ¹ ^, ² ^, ³ ^, ⁴ , M. R. Alves ¹² ^, ¹³ ^, ¹⁴ , C. Arata ¹⁵ ^, ¹⁶ ^, ¹⁷ ^, ¹⁴ , E. Boedicker ¹ ^, ² ^, ³ ^, ⁴ , S. Bourne ¹⁸ ^, ¹⁹ ^, ²⁰ ^, ²¹ , F. Cardoso-Saldaña ¹⁸ ^, ¹⁹ ^, ²⁰ ^, ²¹ , R. Corsi ²² ^, ²³ ^, ²⁴ ^, ²⁵ ^, ²⁶ , P. F. DeCarlo ¹ ^, ²⁷ ^, ²⁸ ^, ¹⁴ ^, ²⁶ , A. H. Goldstein ¹⁵ ^, ¹⁶ ^, ¹⁷ ^, ¹⁴ ^, ²⁹ , V. H. Grassian ¹² ^, ¹³ ^, ¹⁴ , L. Hildebrandt Ruiz ¹⁸ ^, ¹⁹ ^, ²⁰ ^, ²¹ , J. L. Jimenez ³⁰ ^, ³¹ ^, ⁷ ^, ¹⁴ , T. F. Kahan ¹ ^, ³² ^, ³³ ^, ¹⁴ ^, ¹ , E. F. Katz ¹ ^, ²⁷ ^, ²⁸ ^, ¹⁴ , J. M. Mattila ¹ ^, ² ^, ³ ^, ⁴ , W. W. Nazaroff ²⁹ ^, ¹⁶ ^, ¹⁷ ^, ¹⁴ , A. Novoselac ²⁶ ^, ³⁴ ^, ³⁵ ^, ²⁰ ^, ³⁶ , R. E. O'Brien ¹ ^, ³⁷ ^, ³⁸ ^, ³⁹ , V. W. Or ¹² ^, ¹³ ^, ¹⁴ , S. Patel ⁵ ^, ⁶ ^, ⁷ ^, ⁸ , S. Sankhyan ⁵ ^, ⁶ ^, ⁷ ^, ⁸ , P. S. Stevens ⁴⁰ ^, ⁴¹ ^, ⁴² ^, ⁴³ , Y. Tian ¹⁵ ^, ¹⁶ ^, ¹⁷ ^, ¹⁴ , M. Wade ¹⁸ ^, ¹⁹ ^, ²⁰ ^, ²¹ , C. Wang ¹ ^, ⁹ ^, ¹⁰ ^, ¹¹ , S. Zhou ¹ ^, ³² ^, ³³ ^, ¹⁴ , Y. Zhou ⁴⁴ ^, ² ^, ³ ^, ⁴

Publication date (Electronic): 2019

Journal: Environmental Science: Processes & Impacts

Publisher: Royal Society of Chemistry (RSC)

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Abstract

The House Observations of Microbial and Environmental Chemistry (HOMEChem) study was a large-scale collaborative experimental investigation probing indoor air composition and chemistry.

Abstract

The House Observations of Microbial and Environmental Chemistry (HOMEChem) study is a collaborative field investigation designed to probe how everyday activities influence the emissions, chemical transformations and removal of trace gases and particles in indoor air. Sequential and layered experiments in a research house included cooking, cleaning, variable occupancy, and window-opening. This paper describes the overall design of HOMEChem and presents preliminary case studies investigating the concentrations of reactive trace gases, aerosol particles, and surface films. Cooking was a large source of VOCs, CO ₂, NO _x, and particles. By number, cooking particles were predominantly in the ultrafine mode. Organic aerosol dominated the submicron mass, and, while variable between meals and throughout the cooking process, was dominated by components of hydrocarbon character and low oxygen content, similar to cooking oil. Air exchange in the house ensured that cooking particles were present for only short periods. During unoccupied background intervals, particle concentrations were lower indoors than outdoors. The cooling coils of the house ventilation system induced cyclic changes in water soluble gases. Even during unoccupied periods, concentrations of many organic trace gases were higher indoors than outdoors, consistent with housing materials being potential sources of these compounds to the outdoor environment. Organic material accumulated on indoor surfaces, and exhibited chemical signatures similar to indoor organic aerosol.

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The National Human Activity Pattern Survey (NHAPS): a resource for assessing exposure to environmental pollutants.

N E Klepeis, W C Nelson, W R Ott … (2001)

Because human activities impact the timing, location, and degree of pollutant exposure, they play a key role in explaining exposure variation. This fact has motivated the collection of activity pattern data for their specific use in exposure assessments. The largest of these recent efforts is the National Human Activity Pattern Survey (NHAPS), a 2-year probability-based telephone survey (n=9386) of exposure-related human activities in the United States (U.S.) sponsored by the U.S. Environmental Protection Agency (EPA). The primary purpose of NHAPS was to provide comprehensive and current exposure information over broad geographical and temporal scales, particularly for use in probabilistic population exposure models. NHAPS was conducted on a virtually daily basis from late September 1992 through September 1994 by the University of Maryland's Survey Research Center using a computer-assisted telephone interview instrument (CATI) to collect 24-h retrospective diaries and answers to a number of personal and exposure-related questions from each respondent. The resulting diary records contain beginning and ending times for each distinct combination of location and activity occurring on the diary day (i.e., each microenvironment). Between 340 and 1713 respondents of all ages were interviewed in each of the 10 EPA regions across the 48 contiguous states. Interviews were completed in 63% of the households contacted. NHAPS respondents reported spending an average of 87% of their time in enclosed buildings and about 6% of their time in enclosed vehicles. These proportions are fairly constant across the various regions of the U.S. and Canada and for the California population between the late 1980s, when the California Air Resources Board (CARB) sponsored a state-wide activity pattern study, and the mid-1990s, when NHAPS was conducted. However, the number of people exposed to environmental tobacco smoke (ETS) in California seems to have decreased over the same time period, where exposure is determined by the reported time spent with a smoker. In both California and the entire nation, the most time spent exposed to ETS was reported to take place in residential locations.

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Volatile chemical products emerging as largest petrochemical source of urban organic emissions

Christopher D. Cappa, Brian C McDonald, Joost de Gouw … (2018)

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An Aerosol Chemical Speciation Monitor (ACSM) for Routine Monitoring of the Composition and Mass Concentrations of Ambient Aerosol

N. L. Ng, S C Herndon, A. Trimborn … (2011)

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Author and article information

Journal

Journal ID (publisher-id): ESPICZ

Title: Environmental Science: Processes & Impacts

Abbreviated Title: Environ. Sci.: Processes Impacts

Publisher: Royal Society of Chemistry (RSC)

ISSN (Print): 2050-7887

ISSN (Electronic): 2050-7895

Publication date Created: August 14 2019

Publication date (Electronic): 2019

Volume: 21

Issue: 8

Pages: 1280-1300

Affiliations

[1 ]Department of Chemistry

[2 ]Colorado State University

[3 ]Fort Collins

[4 ]USA 80523

[5 ]Department of Mechanical Engineering

[6 ]University of Colorado Boulder

[7 ]Boulder

[8 ]USA 80309

[9 ]University of Toronto

[10 ]Toronto

[11 ]Canada M5S 3H6

[12 ]Department of Chemistry and Biochemistry

[13 ]University of California San Diego

[14 ]USA

[15 ]Department of Environmental Science, Policy, and Management

[16 ]University of California

[17 ]Berkeley

[18 ]Center for Energy and Environmental Resources

[19 ]The University of Texas at Austin

[20 ]Austin

[21 ]USA 78758

[22 ]Maseeh College of Engineering & Computer Science

[23 ]Portland State University

[24 ]Portland

[25 ]USA 97201

[26 ]Department of Civil

[27 ]Drexel University

[28 ]Philadelphia

[29 ]Department of Civil and Environmental Engineering

[30 ]Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES)

[31 ]University of Colorado

[32 ]Syracuse University

[33 ]Syracuse

[34 ]Architectural and Environmental Engineering

[35 ]University of Texas at Austin

[36 ]USA 78712

[37 ]College of William and Mary

[38 ]Williamsburg

[39 ]USA 23185

[40 ]O'Neill School of Public and Environmental Affairs and Department of Chemistry

[41 ]Indiana University

[42 ]Bloomington

[43 ]USA 47405

[44 ]Department of Atmospheric Sciences

Article

DOI: 10.1039/C9EM00228F

PubMed ID: 31328749

SO-VID: 87aea95d-5cdd-433e-bb3e-a9ea1b6790a3

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http://creativecommons.org/licenses/by-nc/3.0/

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Overview of HOMEChem: House Observations of Microbial and Environmental Chemistry

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Abstract

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Microbial Genomics

Most cited references 88

The National Human Activity Pattern Survey (NHAPS): a resource for assessing exposure to environmental pollutants.

Volatile chemical products emerging as largest petrochemical source of urban organic emissions

An Aerosol Chemical Speciation Monitor (ACSM) for Routine Monitoring of the Composition and Mass Concentrations of Ambient Aerosol

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Cited by 54

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