Alkaline Leaching and Concurrent Cementation of Dissolved Pb and Zn from Zinc Plant Leach Residues

Silwamba, Marthias; Ito, Mayumi; Hiroyoshi, Naoki; Tabelin, Carlito Baltazar; Hashizume, Ryota; Fukushima, Tomoki; Park, Ilhwan; Jeon, Sanghee; Igarashi, Toshifumi; Sato, Tsutomu; Nyambe, Imasiku; Nakata, Hokuto; Nakayama, Shouta; Ishizuka, Mayumi

Alkaline Leaching and Concurrent Cementation of Dissolved Pb and Zn from Zinc Plant Leach Residues

Silwamba, Marthias; Ito, Mayumi; Hiroyoshi, Naoki et al.

Minerals, 2022, 12(4), 393

Permalink : https://hdl.handle.net/2115/85607

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https://doi.org/10.3390/min12040393

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アクセス権	metadata only access
URI	https://hdl.handle.net/2115/85607
タイトル	Alkaline Leaching and Concurrent Cementation of Dissolved Pb and Zn from Zinc Plant Leach Residues
著者	Silwamba, Marthias ; Ito, Mayumi ; Hiroyoshi, Naoki ; Tabelin, Carlito Baltazar ; Hashizume, Ryota ; Fukushima, Tomoki ; Park, Ilhwan ; Jeon, Sanghee ; Igarashi, Toshifumi ; Sato, Tsutomu ; Nyambe, Imasiku ; Nakata, Hokuto ; Nakayama, Shouta ; Ishizuka, Mayumi
著者名 Silwamba, Marthias
著者名 Ito, Mayumi
著者名 Hiroyoshi, Naoki
著者名 Tabelin, Carlito Baltazar
著者名 Hashizume, Ryota
著者名 Fukushima, Tomoki
著者名 Park, Ilhwan
著者名 Jeon, Sanghee
著者名 Igarashi, Toshifumi
著者名 Sato, Tsutomu
著者名 Nyambe, Imasiku
著者名 Nakata, Hokuto
e-Rad_Researcher 90647629 著者名 Nakayama, Shouta
e-Rad_Researcher 50332474 著者名 Ishizuka, Mayumi
言語	英語
キーワード	leaching
	cementation
	lead
	zinc
	Al metal powder
	zinc plant leach residues
発行日	2022-03-23
出版者	MDPI
収録物名	Minerals
巻(号)	12(4)
ページ	393
抄録	Zinc plant leach residues (ZPLRs), particularly those produced using old technologies, have both economic importance as secondary raw materials and have environmental impacts because they contain hazardous heavy metals that pose risks to human health and the environment. Therefore, the extraction and recovery of these metals from ZPLRs has both economic and environmental benefits. In this study, we investigated the removal of lead (Pb) and zinc (Zn) from ZPLRs by alkaline (NaOH) leaching and the concurrent cementation of dissolved Pb and Zn using aluminum (Al) metal powder. The effects of the leaching time, NaOH concentration, solid-to-liquid ratio (S/L), and dosage of Al metal powder on the extraction of Pb and Zn were investigated. Pb and Zn removal efficiencies increased with increasing NaOH concentrations and decreasing S/Ls. The Pb and Zn removal efficiencies were 62.2% and 27.1%, respectively, when 2.5 g/50 mL (S/L) of ZPLRs were leached in a 3 M NaOH solution for 30 min. The extraction of Pb and Zn could be attributed to the partitioning of these metals in relatively more mobile phases-water-soluble, exchangeable, and carbonate phases-in ZPLRs. Around 100% of dissolved Pb and less than 2% of dissolved Zn were cemented in leaching pulp when Al metal powder was added. Minerals in the solid residues, particularly iron oxides minerals, were found to suppress the cementation of extracted Zn in leaching pulp, and when they were removed by filtration, Zn was recovered by Al metal powder via cementation.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
権利情報	© 2022 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/)
PISSN	2075-163X
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/min12040393