Continuous fractionation of fly ash particles by SPLIT for the investigation of PCDD/Fs levels in different sizes of insoluble particles
SCIE
SCOPUS
- Title
- Continuous fractionation of fly ash particles by SPLIT for the investigation of PCDD/Fs levels in different sizes of insoluble particles
- Authors
- Moon, MH; Kang, DJ; Lim, HB; Oh, JOE; Chang, YS
- Date Issued
- 2002-10-15
- Publisher
- AMER CHEMICAL SOC
- Abstract
- A combined analytical method has been developed to characterize the size dependent levels of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) contained in fly ash particles from a municipal solid waste incinerator (MSWI). Gravitational SPLITT fractionation (GSF), a relatively new technique for the fast and continuous separation of micron sized particles, was used to fractionate a fly ash sample, directly collected from a bag-filter house of MSWI in Korea, into six different size groups (< 1.0, 1.0-2.5, 2.5-5.0, 5.0-10, 10-20, and 20-53 mum in diameter) in water solution, and the resulting fractions are examined by high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS) in order to determine the concentration of PCDD/Fs according to these particle sizes. The results from SPLITT fractionation show that approximately 54% of the fly ash particles (sieved fraction < 53 mum) by weight have been found to be smaller than 5.0 mum excluding the water soluble matter in the sample. From the HRGC/HRMS measurements, particle fractions in the size range of PM 1.0-2.5 and 2.5-5.0 appear to carry about 76 and 79 ng/g of PCDD/Fs which are relatively larger than those found in other diameter ranges. Principal component analysis (PCA) shows that particles larger than 5.0 mum are clustered into a group predominantly containing low chlorinated dioxins and fractions smaller than 5.0 mum into another group with lower chlorinated furans. This study demonstrated that the combining GSF with a secondary analytical method such as HRGC/HRMS has the potential to obtain size dependent information of particulate materials in relation to their production processes, chemical compositions, environmental fates, and other factors.
- Keywords
- MUNICIPAL WASTE INCINERATOR; DIBENZO-P-DIOXINS; ATMOSPHERIC PARTICLES; VEGETATION; EMISSIONS; SOIL; ENVIRONMENT; TAIWAN; IMPACT
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18872
- DOI
- 10.1021/ES011145O
- ISSN
- 0013-936X
- Article Type
- Article
- Citation
- ENVIRONMENTAL SCIENCE & TECHNOLOGY, vol. 36, no. 20, page. 4416 - 4423, 2002-10-15
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