Locating sources of hazardous gas emissions using dual pollution rose plots and open path Fourier transform infrared spectroscopy

Sung, Lung Yu; Shie, Ruei-Hao; Lu, Chia Jung

doi:10.1016/j.jhazmat.2013.11.006

Cited by 14 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The principle of AVL'SESAM FTIR system is shown as follow [32]: after absorbing the energy, the molecular vibrations of the substance lead to the energy level transitions. Then the process was recorded and the infrared absorption spectrum of the molecular was measured.…”

Section: Principle Of Fourier Transform Infra-red (Ftir)mentioning

confidence: 99%

Comparative study on measurements of formaldehyde emission of methanol/gasoline fueled SI engine

Geng

Zhang

Yang

et al. 2015

Fuel

View full text Add to dashboard Cite

Section: Principle Of Fourier Transform Infra-red (Ftir)mentioning

confidence: 99%

Comparative study on measurements of formaldehyde emission of methanol/gasoline fueled SI engine

Geng

Zhang

Yang

et al. 2015

Fuel

View full text Add to dashboard Cite

“…Ma and Zhang 78 improved the source parameters estimation, of a simple Gaussian model, by combining an integrated Gaussian-Machine Learning model with the particle swarm optimization approach and later 79 introducing the Tikhonov regularization approach. Further improvement and increasing of the accuracy of the results may be gained by including in the formulation observations from multiple time periods, instead of a single time-integration (dose) per location (sampling point) as it was demonstrated in other cases 80 and herein. Finally, pre-calculated response (health impact) databases could be combined with stochastic methods such as artificial neural networks to develop response-source correlations which then could be used with real-time observations to reconstruct the source-parameters, similarly to dispersion pattern recreation without the source knowledge 81 .…”

Section: Discussionmentioning

confidence: 89%

Source reconstruction of airborne toxics based on acute health effects information

Argyropoulos

Elkhalifa

Fthenou³

et al. 2018

Sci Rep

View full text Add to dashboard Cite

The intentional or accidental release of airborne toxics poses great risk to the public health. During these incidents, the greatest factor of uncertainty is related to the location and rate of released substance, therefore, an information of high importance for emergency preparedness and response plans. A novel computational algorithm is proposed to estimate, efficiently, the location and release rate of an airborne toxic substance source based on health effects observations; data that can be readily available, in a real accident, contrary to actual measurements. The algorithm is demonstrated by deploying a semi-empirical dispersion model and Monte Carlo sampling on a simplified scenario. Input data are collected at varying receptor points for toxics concentrations (C; standard approach) and two new types: toxic load (TL) and health effects (HE; four levels). Estimated source characteristics are compared with scenario values. The use of TL required the least number of receptor points to estimate the release rate, and demonstrated the highest probability (>90%). HE required more receptor points, than C, but with lesser deviations while probability was comparable, if not better. Finally, the algorithm assessed very accurately the source location when using C and TL with comparable confidence, but HE demonstrated significantly lower confidence.

show abstract

“…Fourier transform infrared (FTIR) spectrometry is an optical sensing technology that can detect multi-gaseous pollutants on a continuous basis and is therefore suitable for use in VOC or odor emission source investigation (Russwurm et al, 1991;Sung et al, 2014). It can allow real-time monitoring and analysis of several compounds simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Application of Factor and Cluster Analyses to Determine Source–Receptor Relationships of Industrial Volatile Organic Odor Species in a Dual-Optical Sensing System

Yang¹,

Chang²,

Ho³

et al. 2019

Preprint

View full text Add to dashboard Cite

Abstract. Most odor nuisance investigations rely on either human olfactory examination or on-site sampling and analytical techniques, but these methods are often subject to spatial and temporal limitations and thus impractical for locating odor emission sources. This study developed an alternative approach with a dual-optical sensing system, a meteorological station, and the combination of factor and cluster analyses to identify and characterize emission sources of multiple air contaminants. Factor and cluster analyses were employed to establish the emission profile of multiple odorous substances from each emission source. Both receptor and source continuous monitoring data were reciprocally compared to characterize the emission sources of various odorous substances. Open-path Fourier transform infrared (OP-FTIR) as a receptor path detected concurrent trends of several organic solvents with concentrations higher than the reference odor threshold values, indicating that these compounds were potential causes of odor nuisance. Qualitative source apportionment by factor and cluster analyses suggested that these odorous substances were used as organic solvents in surface coating or painting processes. Closed-cell Fourier transform infrared (CC-FTIR) at two nearby surface-coating companies indicated that only one company’s stack exhibited the same odorous substance profile found by the OP-FTIR receptor path. The major odor emission source was thus identified in this study. This study demonstrated the feasibility of using the alternative investigative framework to successfully identify emission sources from an industrial odor nuisance site. The major emission sources were identified, and future enforcement plans can be conducted to enhance odor investigation efficiency and improve overall air quality.

show abstract

Locating sources of hazardous gas emissions using dual pollution rose plots and open path Fourier transform infrared spectroscopy

Cited by 14 publications

References 32 publications

Comparative study on measurements of formaldehyde emission of methanol/gasoline fueled SI engine

Comparative study on measurements of formaldehyde emission of methanol/gasoline fueled SI engine

Source reconstruction of airborne toxics based on acute health effects information

Application of Factor and Cluster Analyses to Determine Source–Receptor Relationships of Industrial Volatile Organic Odor Species in a Dual-Optical Sensing System

Contact Info

Product

Resources

About