Heavy-metal reduction and solidification in municipal solid waste incineration (MSWI) fly ash using water, NaOH, KOH, and NH4OH in combination with CO2 uptake procedure

Dongwoo Kang; Juhee Son; Yunsung Yoo; Sangwon Park; Il Sang Huh; Jinwon Park

doi:10.1016/j.cej.2019.122534

Heavy-metal reduction and solidification in municipal solid waste incineration (MSWI) fly ash using water, NaOH, KOH, and NH₄OH in combination with CO₂ uptake procedure

Dongwoo Kang, Juhee Son, Yunsung Yoo, Sangwon Park, Il Sang Huh, Jinwon Park

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

A new method for reducing heavy metals in municipal solid waste incineration (MSWI) fly ash was investigated. In many previous studies, acidic leaching was regarded as a standard method for metal-ion extraction. However, this process requires additional treatment of the wastewater containing heavy-metal components. Therefore, in this study, we used basic leaching solvents, i.e., 0.5 M aqueous NaOH, KOH, and NH₄OH. The leachates and remaining solids were qualitatively and quantitatively analyzed. To facilitate the handling of the extracted heavy-metal components, the leached metal ions were fixed and precipitated using a CO₂ uptake procedure. The solids were analyzed using X-ray fluorescence and X-ray diffraction, and scanning electron microscope images were obtained. The leachates were analyzed using inductively coupled plasma optical emission spectroscopy. In contrast to conventional acidic extraction, heavy-metal reduction and fixation, as well as the mass reduction of the waste, could be achieved with the proposed method.

Original language	English
Article number	122534
Journal	Chemical Engineering Journal
Volume	380
DOIs	https://doi.org/10.1016/j.cej.2019.122534
Publication status	Published - 2020 Jan 15

Bibliographical note

Funding Information:
Funding: This work was supported by the Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP); Ministry of Trade, Industry & Energy, Republic of Korea [grant number 20174010201640 ]; Korea Institute of Energy Technology Evaluation and Planning ( KETEP ); and Ministry of Trade, Industry & Energy ( MOTIE ) of the Republic of Korea [grant number 20152010201850 ].

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.cej.2019.122534

Cite this

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title = "Heavy-metal reduction and solidification in municipal solid waste incineration (MSWI) fly ash using water, NaOH, KOH, and NH4OH in combination with CO2 uptake procedure",

abstract = "A new method for reducing heavy metals in municipal solid waste incineration (MSWI) fly ash was investigated. In many previous studies, acidic leaching was regarded as a standard method for metal-ion extraction. However, this process requires additional treatment of the wastewater containing heavy-metal components. Therefore, in this study, we used basic leaching solvents, i.e., 0.5 M aqueous NaOH, KOH, and NH4OH. The leachates and remaining solids were qualitatively and quantitatively analyzed. To facilitate the handling of the extracted heavy-metal components, the leached metal ions were fixed and precipitated using a CO2 uptake procedure. The solids were analyzed using X-ray fluorescence and X-ray diffraction, and scanning electron microscope images were obtained. The leachates were analyzed using inductively coupled plasma optical emission spectroscopy. In contrast to conventional acidic extraction, heavy-metal reduction and fixation, as well as the mass reduction of the waste, could be achieved with the proposed method.",

author = "Dongwoo Kang and Juhee Son and Yunsung Yoo and Sangwon Park and Huh, {Il Sang} and Jinwon Park",

note = "Funding Information: Funding: This work was supported by the Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP); Ministry of Trade, Industry & Energy, Republic of Korea [grant number 20174010201640 ]; Korea Institute of Energy Technology Evaluation and Planning ( KETEP ); and Ministry of Trade, Industry & Energy ( MOTIE ) of the Republic of Korea [grant number 20152010201850 ]. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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AU - Yoo, Yunsung

AU - Park, Sangwon

AU - Huh, Il Sang

AU - Park, Jinwon

N1 - Funding Information: Funding: This work was supported by the Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP); Ministry of Trade, Industry & Energy, Republic of Korea [grant number 20174010201640 ]; Korea Institute of Energy Technology Evaluation and Planning ( KETEP ); and Ministry of Trade, Industry & Energy ( MOTIE ) of the Republic of Korea [grant number 20152010201850 ]. Publisher Copyright: © 2019 Elsevier B.V.

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N2 - A new method for reducing heavy metals in municipal solid waste incineration (MSWI) fly ash was investigated. In many previous studies, acidic leaching was regarded as a standard method for metal-ion extraction. However, this process requires additional treatment of the wastewater containing heavy-metal components. Therefore, in this study, we used basic leaching solvents, i.e., 0.5 M aqueous NaOH, KOH, and NH4OH. The leachates and remaining solids were qualitatively and quantitatively analyzed. To facilitate the handling of the extracted heavy-metal components, the leached metal ions were fixed and precipitated using a CO2 uptake procedure. The solids were analyzed using X-ray fluorescence and X-ray diffraction, and scanning electron microscope images were obtained. The leachates were analyzed using inductively coupled plasma optical emission spectroscopy. In contrast to conventional acidic extraction, heavy-metal reduction and fixation, as well as the mass reduction of the waste, could be achieved with the proposed method.

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