Size-based analysis of incinerator fly ash using gravitational SPLITT fractionation, sedimentation field-flow fractionation, and inductively coupled plasma-atomic emission spectroscopy.
Fly ash has been regarded as hazardous because of its high adsorption of toxic organic and/or inorganic pollutants. Fly ash is also known to have broad distributions of different chemical and physical properties, such as size and density. In this study, fly ash emitted from a solid waste incinerator was pre-fractionated into six sub-populations by use of gravitational SPLITT fractionation (GSF). The GSF fractions were then analyzed by sedimentation field-flow fractionation (SdFFF) and ICP-AES. SdFFF analysis showed the fly ash has a broad size distribution ranging from a few nanometers up to about 50 microm. SdFFF results were confirmed by electron microscopy. Inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analysis of the GSF fractions showed the fly-ash particles contain a variety of inorganic elements including Ca, Si, Mg, Fe, and Pb. The most abundant in fly ash was Ca, followed by Si then Mg. No correlations were found between trace element concentration and particle size.
Kim
Won-Suk
WS
Department of Chemistry, Yonsei University, 120-749 Seoul, Korea.
Park
Mira
M
Lee
Dai Woon
DW
Moon
Myeong Hee
MH
Lim
Heungbin
H
Lee
Seungho
S
D002244:Carbon / Q000032:analysis*; D060729:Coal Ash; D031521:Fractionation, Field Flow / Q000379:methods*; D006112:Gravitation; D008855:Microscopy, Electron, Scanning; D052638:Particulate Matter; D013054:Spectrophotometry, Atomic / Q000379:methods*
D060729:Coal Ash; D052638:Particulate Matter; D002244:Carbon