Size-based analysis of incinerator fly ash using gravitational SPLITT fractionation, sedimentation field-flow fractionation, and inductively coupled plasma-atomic emission spectroscopy |
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| Authors: | Won-Suk Kim Mira Park Dai Woon Lee Myeong Hee Moon Heungbin Lim Seungho Lee |
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| Institution: | (1) Department of Chemistry, Yonsei University, 120-749 Seoul, Korea;(2) Department of Chemistry, Pusan National University, 609-735 Pusan, Korea;(3) Department of Chemistry, Dankook University, 140-714 Seoul, Korea;(4) Department of Chemistry, Hannam University, 306-791 Taejon, Korea;(5) Present address: Department of Chemistry and the Beckman Institute, University of Illinois, Urbana, Illinois 61801, USA |
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| Abstract: | 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 µm. 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. |
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| Keywords: | Incinerator fly ash Inorganic elements Inductively coupled plasma– atomic emission spectroscopy Sedimentation field-flow fractionation Size distribution SPLITT fractionation |
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