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

    Recovery of Heavy Metals from MSW Molten Fly Ash by CIP Method

    Access Status
    Fulltext not available
    Authors
    Alorro, Richard
    Hiroyoshi, Naoki
    Ito, Mayumi
    Tsunekawa, Masami
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Alorro, Richard and Hiroyoshi, Naoki and Ito, Mayumi and Tsunekawa, Masami. 2009. Recovery of Heavy Metals from MSW Molten Fly Ash by CIP Method. Hydrometallurgy. 97: pp. 8-14.
    Source Title
    Hydrometallurgy
    DOI
    10.1016/j.hydromet.2008.12.007
    ISSN
    0304386X
    URI
    http://hdl.handle.net/20.500.11937/43480
    Collection
    • Curtin Research Publications
    Abstract

    Molten fly ash (MFA), generated by the melting process of municipal solid waste incineration (MSWI) solid residues in Japan, contains considerable amounts of heavy metals such as Pb, Zn, Cu and Cd. Therefore, MFA is classified as a hazardous waste and needs treatment for detoxification or recovery of heavy metals as secondary sources. Carrier-in-Pulp (CIP) method, which is similar in principle with the Carbon-in-Pulp technology for gold recovery from ores, was proposed to recover these heavy metals from molten fly ash. Unlike the traditional Carbon-in-Pulp process, the carrier or adsorbent in the Carrier-in-Pulp method is not only limited to carbon; other materials such as Fe powder can also be used. Moreover, other physical separation techniques such as magnetic separation can also be employed to harvest the carrier from the leach pulp.The present study, which can be regarded as a batch mode Carbon-in-Pulp process, investigated the application of the CIP technique to recover heavy metals from MSW molten fly ash containing 10.2 wt.% Zn,2.78 wt.% Pb, 0.14 wt.% Cu, and 0.12 wt.% Cd. Granular activated carbon (GAC) was utilized as an adsorbent in batch adsorption tests and experiments involving the CIP method using NaCl as lixiviant. The effects of activated carbon dosage, pH, NaCl concentration, and treatment time were determined. Adsorption tests showed that the competition of metal ions present in a multi-component system suppressed the adsorption of Pb, Zn, Cu and Cd on GAC but the suppression can be minimized by increasing the GAC dosage. Around 90–100% of Pb, Zn, Cu and Cd were extracted from MFA at various conditions. At the optimum conditions (5 kmolm-3NaCl,10 g GAC, pH 5–6, and 3 h treatment time), GAC recovered 57% Zn, 40% Pb, 90% Cu, and 54% Cd. The leaching test confirmed that the extraction of Pb from the CIP-treated residue was below the standard, thus, satisfying the land-filling guidelines in Japan.

    Related items

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

    • Rejection and Recovery of Heavy Metals from MSW Melting Fly Ash by Carrier-in-Pulp Method
      Alorro, Richard; Hiroyoshi, N.; Mitani, S.; Ito, M.; Tsunekawa, M. (2008)
      Melting has become a popular pretreatment method for municipal solid waste (MSW) incineration residues in Japan. Although the method is effective in stabilizing the hazardous organic substances such as dioxin in the ...
    • Simultaneous removal process for humic acids and metal ions by adsorption
      Terdkiatburana, Thanet (2007)
      Humic substances are macromolecules that naturally occur in all environments in which vegetation matter are present. In general, humic acid is part of humic substances which form the major fraction of the dissolved organic ...
    • Heavy Metals: Toxicity and Removal by Biosorption
      Mudhoo, A.; Garg, V.; Wang, Shaobin (2012)
      Industrialization, urbanization and various anthropogenic activities such as mining and agriculture have increased releases of toxic heavy metals into the natural environment such as soils, lakes, rivers, groundwaters and ...
    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.