Recovery of Lead and Zinc from Zinc Plant Leach Residues by Concurrent Dissolution-Cementation Using Zero-Valent Aluminum in Chloride Medium

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

Recovery of Lead and Zinc from Zinc Plant Leach Residues by Concurrent Dissolution-Cementation Using Zero-Valent Aluminum in Chloride Medium

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

Metals, 2020, 10(4), 531

Permalink : https://hdl.handle.net/2115/78722

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アクセス権	open access
URI	https://hdl.handle.net/2115/78722
タイトル	Recovery of Lead and Zinc from Zinc Plant Leach Residues by Concurrent Dissolution-Cementation Using Zero-Valent Aluminum in Chloride Medium
著者	Silwamba, Marthias ; Ito, Mayumi ; Hiroyoshi, Naoki ; Tabelin, Carlito Baltazar ; Hashizume, Ryota ; Fukushima, Tomoki ; Park, Ilhwan ; Jeon, Sanghee ; Igarashi, Toshifumi ; Sato, Tsutomu ; Chirwa, Meki ; Banda, Kawawa ; 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 Chirwa, Meki
著者名 Banda, Kawawa
著者名 Nyambe, Imasiku
e-Rad_Researcher 60815273 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	lead
	zinc
	zinc plant leach residues
	zero-valent aluminum
	leaching
	cementation
発行日	2020-04
出版者	MDPI
収録物名	Metals
巻(号)	10(4)
ページ	531
抄録	Zinc plant leach residues (ZPLRs) contain significant amounts of metal compounds of lead (Pb), zinc (Zn), iron (Fe), etc., hence, they are considered as a secondary source of metals. On the other hand, ZPLRs are regarded as hazardous materials because they contain heavy metals that pollute the environment. Resources and environmental concerns of ZPLRs were addressed in this study by removing/recovering Pb and Zn using a concurrent dissolution and cementation technique. To cement the dissolved Pb and Zn in leaching pulp, zero-valent aluminum (ZVAl) was added during ZPLRs leaching in the hydrochloric (HCl)-sodium chloride (NaCl) solution. The resulting cemented metals were agglomerated and separated by sieving. Lead removal increased with increasing both NaCl and HCl concentrations. However, when ZVAl was added, significant Pb removal was achieved at a low concentration. Zinc was not cemented out of the pulp using ZVAl and its recovery from ZPLRs was dependent on the HCl concentration only. By applying a concurrent dissolution and cementation technique, both Pb and Zn were removed using a low concentration of NaCl, and most importantly Pb-the most toxic metal in ZPLRs-was captured and separated before the solid-liquid separation, hence, eliminating the need for extensive washing of the generated residues to remove the inherent residual solution.
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	© 2020 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/).
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/met10040531