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Particle size: A missing factor in risk assessment of human exposure to toxic chemicals in settled indoor dust
POPs Research Center, School of Environment, Tsinghua University, Beijing, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing, China.
POPs Research Center, School of Environment, Tsinghua University, Beijing, China.
POPs Research Center, School of Environment, Tsinghua University, Beijing, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing, China.
POPs Research Center, School of Environment, Tsinghua University, Beijing, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing, China.
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2012 (English)In: Environment International, ISSN 0160-4120, E-ISSN 1873-6750, Vol. 49, 24-30 p.Article in journal (Refereed) Published
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Abstract [en]

For researches on toxic chemicals in settled indoor dust, selection of dust fraction is a critical influencing factor to the accuracy of human exposure risk assessment results. However, analysis of the selection of dust fraction in recent studies revealed that there is no consensus. This study classified and presented researches on distribution of toxic chemicals according to dust particle size and on relationship between dust particle size and human exposure possibility. According to the literature, beyond the fact that there were no consistent conclusions on particle size distribution of adherent fraction, dust with particle size less than 100 mu m should be paid more attention and that larger than 250 mu m is neither adherent nor proper for human exposure risk assessment. Calculation results based on literature data show that with different selections of dust fractions, analytical results of toxic chemicals would vary up to 10-fold, which means that selecting dust fractions arbitrarily will lead to large errors in risk assessment of human exposure to toxic chemicals in settled dust. Taking into account the influence of dust particle size on risk assessment of human exposure to toxic chemicals, a new methodology for risk assessment of human exposure to toxic chemicals in settled indoor dust is proposed and human exposure parameter systems to settled indoor dust are advised to be established at national and regional scales all over the world.

Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 49, 24-30 p.
Keyword [en]
Particle size; Settled dust; Toxic chemicals; Adherent fraction; Human exposure
National Category
Chemical Sciences Environmental Sciences
Research subject
Chemistry; Enviromental Science
Identifiers
URN: urn:nbn:se:oru:diva-47616DOI: 10.1016/j.envint.2012.08.010ISI: 000311600500004PubMedID: 22964460Scopus ID: 2-s2.0-84865971850OAI: oai:DiVA.org:oru-47616DiVA: diva2:901280
Note

Funding Agency:

Key Project of National Natural Science Foundation of China 50838002

Available from: 2016-02-07 Created: 2016-01-19 Last updated: 2017-10-17Bibliographically approved

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