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Recovery of heavy metals from MSW molten fly ash by carrier-in-pulp method: Fe powder as carrier

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タイトル: Recovery of heavy metals from MSW molten fly ash by carrier-in-pulp method: Fe powder as carrier
著者: Alorro, Richard Diaz 著作を一覧する
Mitani, Shinichi 著作を一覧する
Hiroyoshi, Naoki 著作を一覧する
Ito, Mayumi 著作を一覧する
Tsunekawa, Masami 著作を一覧する
キーワード: Hydrometallurgy
Leaching
Cementation
Magnetic separation
Waste processing
発行日: 2008年12月
出版者: Elsevier Ltd.
誌名: Minerals Engineering
巻: 21
号: 15
開始ページ: 1094
終了ページ: 1101
出版社 DOI: 10.1016/j.mineng.2008.02.005
抄録: Municipal solid waste (MSW) molten fly ash is classified as a hazardous waste because it contains considerable amount of heavy metals, which pose environmental concern due to their leaching potential in landfill environments. This study proposes Carrier-in-Pulp (CIP) method as a new hydrometallurgical route to extract and recover Pb, Zn, Cu, and Cd from molten fly ash before landfilling. In this method, a carrier material, which recovers the extracted metals, is added simultaneously with fly ash to a leaching solution and is harvested from the pulp by physical separation method, such as magnetic separation or sieving. To demonstrate the effect of the CIP method, shaking flask experiments were conducted under various conditions using NaCl solution, iron powder as carrier, and molten fly ash. More than 99 wt% Pb, Zn, and Cd, and 97 wt% Cu were extracted from the ash. However, only Pb and Cu were recovered (96.3 wt% Pb and 94.3 wt% Cu) by the iron powder through cementation, leaving behind Zn and Cd ions in the solution phase. The leaching test conducted on the treated fly ash residue revealed that the CIP method suppressed the solublization of Pb to values below the landfill disposal guideline.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/38748
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: Richard Diaz Alorro

 

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