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  • Title: Electrodialytic removal of heavy metals from municipal solid waste incineration fly ash using ammonium citrate as assisting agent.
    Author: Pedersen AJ, Ottosen LM, Villumsen A.
    Journal: J Hazard Mater; 2005 Jun 30; 122(1-2):103-9. PubMed ID: 15943932.
    Abstract:
    Electrodialytic remediation, an electrochemically assisted separation method, has previously shown potential for removal of heavy metals from municipal solid waste incineration (MSWI) fly ashes. In this work electrodialytic remediation of MSWI fly ash using ammonium citrate as assisting agent was studied, and the results were compared with traditional batch extraction experiments. The application of electric current was found to increase the heavy metal release significantly compared to batch extraction experiments at comparable conditions (same liquid-to-solid ratio, same assisting agent, and same extraction time). Up to 86% Cd, 20% Pb, 62% Zn, 81% Cu and 44% Cr was removed from 75 g of MSWI fly ash in electrodialytic remediation experiments using ammonium citrate as assisting agent. The time range for the experiments varied between 5 and 70 days.
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