Title: | Recovery of Lead and Zinc from Zinc Plant Leach Residues by Concurrent Dissolution-Cementation Using Zero-Valent Aluminum in Chloride Medium |
Authors: | Silwamba, Marthias Browse this author |
Ito, Mayumi Browse this author |
Hiroyoshi, Naoki Browse this author |
Tabelin, Carlito Baltazar Browse this author |
Hashizume, Ryota Browse this author |
Fukushima, Tomoki Browse this author |
Park, Ilhwan Browse this author |
Jeon, Sanghee Browse this author |
Igarashi, Toshifumi Browse this author |
Sato, Tsutomu Browse this author |
Chirwa, Meki Browse this author |
Banda, Kawawa Browse this author |
Nyambe, Imasiku Browse this author |
Nakata, Hokuto Browse this author →KAKEN DB |
Nakayama, Shouta Browse this author →KAKEN DB |
Ishizuka, Mayumi Browse this author →KAKEN DB |
Keywords: | lead |
zinc |
zinc plant leach residues |
zero-valent aluminum |
leaching |
cementation |
Issue Date: | Apr-2020 |
Publisher: | MDPI |
Journal Title: | Metals |
Volume: | 10 |
Issue: | 4 |
Start Page: | 531 |
Publisher DOI: | 10.3390/met10040531 |
Abstract: | 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. |
Rights: | © 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/). |
https://creativecommons.org/licenses/by/4.0/ |
Type: | article |
URI: | http://hdl.handle.net/2115/78722 |
Appears in Collections: | 獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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