Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Leaching of metals from waste printed circuit boards (WPCBs) using sulfuric and nitric acids

    Access Status
    Fulltext not available
    Authors
    Kumar, M.
    Lee, J.
    Kim, M.
    Jeong, J.
    Yoo, Kyoungkeun
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Kumar, M. and Lee, J. and Kim, M. and Jeong, J. and Yoo, K. 2014. Leaching of metals from waste printed circuit boards (WPCBs) using sulfuric and nitric acids. Environmental Engineering and Management Journal. 13 (10): pp. 2601-2607.
    Source Title
    Environmental Engineering and Management Journal
    ISSN
    1582-9596
    School
    Dept of Mining Eng & Metallurgical Eng
    URI
    http://hdl.handle.net/20.500.11937/53655
    Collection
    • Curtin Research Publications
    Abstract

    This study aims to understand the acid-leaching behavior of metals from 2 to 4 mm waste printed circuit boards (WPCBs) containing 22.0% ± 1.1 Cu, 6.7% ± 0.2 Ca, 0.68% ± 0.02 Sn, 0.59 ± 0.01 % Pb, 2.71% ± 0.08 Al, 0.22% ± 0.01 Fe, etc.. Copper leaching was increased for sulfuric acid concentrations up to 1.2 mol/L and hydrogen peroxide concentrations of 10.0 vol% for a pulp density of 100 g/L at 50°C over 4 h, whereas for the same concentrations of sulfuric acid and hydrogen peroxide copper leaching was decreased from 75.7 to 56.7% with an increase in pulp density from 25 to 125 g/L. Under the same optimum conditions and a 100 g/L pulp density, the leached copper concentration was 16.66 g/L (75.7%) and the concentrations of Pb, Al, Fe, and Ca were 0.1 g/L, 0.64 g/L, 0.13 g/L, 0.79g/L, respectively. Above 50°C and 500 rpm, the amount of leached copper decreased. With nitric acid, 98.3% copper leaching was obtained under the optimum conditions of 3 mol/L nitric acid and an agitation speed of 800 rpm at 60°C for 5 h at 25 g/L pulp density. Under optimum conditions and 100 g/L pulp density, the concentration of Cu in the leachate was 21.12 g/L (96%), and the concentrations of Pb, Al, Fe and Ca were 0.52 g/L, 0.91 g/L, 0.13 g/L, 1.70 g/L, respectively. At the same pulp density, nitric acid enabled better leaching of copper and other metals than sulfuric acid with 10.0 vol% hydrogen peroxide. The solid precipitates obtained in the leach liquors of PCBs included stannic oxide and calcium aluminum oxide in nitric acid and gypsum in sulfuric acid.

    Related items

    Showing items related by title, author, creator and subject.

    • Sulfur dioxide leaching of zinc sulfide
      McGinnity, Justin (2001)
      Studies were conducted into the mechanism and kinetics of the dissolution of synthetic zinc sulfide and zinc concentrate in aqueous solutions containing sulfur dioxide.Experiments at ambient temperature established that ...
    • The use of methyl ethyl ketone in nitric acid leaching processes for enhancement of Ag recovery from used X-ray films
      Jo, H.; Yoo, Kyoungkeun; Kim, S.; Alorro, Richard (2018)
      A feasibility study was carried out to improve conventional recycling processes of used X-ray film, where silver was recovered mainly by concentrated nitric acid leaching. In the X-ray film, an emulsion layer containing ...
    • Leaching of copper from cuprous oxide in aerated sulfuric acid
      Park, I.; Yoo, Kyoungkeun; Alorro, Richard; Kim, M.; Kim, S. (2017)
      ©2017 The Japan Institute of Metals and Materials. The leaching behavior of copper from Cu 2 O in H 2 SO 4 solution was investigated to establish the leaching process for cathode powders produced by the recycling ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.