論文

査読有り
2020年4月

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

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

10
4
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3390/met10040531
出版者・発行元
MDPI

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.

リンク情報
DOI
https://doi.org/10.3390/met10040531
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000531826500110&DestApp=WOS_CPL
ID情報
  • DOI : 10.3390/met10040531
  • eISSN : 2075-4701
  • Web of Science ID : WOS:000531826500110

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