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Passive Sampling for Semi-Volatile O...

Li, Yuening,

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Passive Sampling for Semi-Volatile Organic Chemicals in the Atmosphere: Theory, Calibration, and Application /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Passive Sampling for Semi-Volatile Organic Chemicals in the Atmosphere: Theory, Calibration, and Application // Yuening Li.
Author:	Li, Yuening,
Description:	1 electronic resource (336 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
Contained By:	Dissertations Abstracts International86-05B.
Subject:	Environmental science. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31486377
ISBN:	9798342750592

Passive Sampling for Semi-Volatile Organic Chemicals in the Atmosphere: Theory, Calibration, and Application /
Li, Yuening,

Passive Sampling for Semi-Volatile Organic Chemicals in the Atmosphere: Theory, Calibration, and Application /Yuening Li. - 1 electronic resource (336 pages)

Source: Dissertations Abstracts International, Volume: 86-05, Section: B.

The need to monitor and control the emissions of semi-volatile organic chemicals (SVOCs) to the atmosphere has contributed to the widespread use of passive air samplers (PASs). Combining theoretical calculations, model simulations, and field and laboratory studies, the research described in this thesis endeavored to address important knowledge gaps that still hamper the confident use of PASs. Specifically, it aimed to assess uncertainties and offer guidance on PAS methodologies, enhance understanding of the performance of PAS, and delineate a practical field application of a PAS.An evaluation suggested that sampling with the polyurethane foam-based PAS (PUF-PAS) incurs uncertainties above 50%, mostly because of the need to know the sorbent capacity of a sampler operating outside of the linear uptake regime. Graphical tools were created using theoretical calculations and model simulations to provide guidance on the planning and interpretation of campaigns relying on the PUF-PAS. Uncertainties are lower for PAS with high uptake capacity that are more likely to remain in the linear uptake regime, such as the styrene-divinylbenzene co-polymeric resin-based PAS (XAD-PAS). A "gold standard" calibration study was, therefore, conducted for the XAD-PAS, which broadened the knowledge of this sampler's uptake kinetics in their dependence on meteorological conditions and chemical properties and of the limits of linear uptake of more volatile SVOCs. Sampling rates were obtained for 120 SVOCs. The performance of models was evaluated, and sorption and degradation rate constants were estimated by combining model simulations with experimental results. Furthermore, the broad utility of XAD-PAS in the atmospheric monitoring of organophosphate esters (OPEs) was investigated through the implementation of two expansive networks in Southern Canada. When combined with precipitation and active air sampling, the sources, partitioning and exchange between phases, spatial patterns, the influence of temperature and population, and the transport of OPEs in the atmosphere were revealed. 

English

ISBN: 9798342750592Subjects--Topical Terms:

677245
Environmental science.
Subjects--Index Terms:

Atmospheric monitoring

Passive Sampling for Semi-Volatile Organic Chemicals in the Atmosphere: Theory, Calibration, and Application /
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520 $a The need to monitor and control the emissions of semi-volatile organic chemicals (SVOCs) to the atmosphere has contributed to the widespread use of passive air samplers (PASs). Combining theoretical calculations, model simulations, and field and laboratory studies, the research described in this thesis endeavored to address important knowledge gaps that still hamper the confident use of PASs. Specifically, it aimed to assess uncertainties and offer guidance on PAS methodologies, enhance understanding of the performance of PAS, and delineate a practical field application of a PAS.An evaluation suggested that sampling with the polyurethane foam-based PAS (PUF-PAS) incurs uncertainties above 50%, mostly because of the need to know the sorbent capacity of a sampler operating outside of the linear uptake regime. Graphical tools were created using theoretical calculations and model simulations to provide guidance on the planning and interpretation of campaigns relying on the PUF-PAS. Uncertainties are lower for PAS with high uptake capacity that are more likely to remain in the linear uptake regime, such as the styrene-divinylbenzene co-polymeric resin-based PAS (XAD-PAS). A "gold standard" calibration study was, therefore, conducted for the XAD-PAS, which broadened the knowledge of this sampler's uptake kinetics in their dependence on meteorological conditions and chemical properties and of the limits of linear uptake of more volatile SVOCs. Sampling rates were obtained for 120 SVOCs. The performance of models was evaluated, and sorption and degradation rate constants were estimated by combining model simulations with experimental results. Furthermore, the broad utility of XAD-PAS in the atmospheric monitoring of organophosphate esters (OPEs) was investigated through the implementation of two expansive networks in Southern Canada. When combined with precipitation and active air sampling, the sources, partitioning and exchange between phases, spatial patterns, the influence of temperature and population, and the transport of OPEs in the atmosphere were revealed. 
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