Volume 3, Issue 7 (July 2006)

    Efficiency of Arsenic Removal Unit Working in Bangladesh and Cement Stabilization of Its Sludge

    (Received 31 March 2005; accepted 24 October 2005)

    CODEN: JAIOAD

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    Abstract

    To supply safe water to the arsenic affected community, an arsenic removal unit, gravel sand filter (GSF), was developed by modifying the pond sand filter (PSF) so that it can be used to overcome the dry season low flow problem of it. Performance data of that arsenic removal unit shows that it can be the most suitable option to solve that problem of the PSF. GSF uses the naturally occurring iron to remove arsenic by coprecipitation. In this process it produces arsenic rich iron sludge. Disposal of this sludge to the nature may pose a risk of secondary contamination to the stratum. Leaching tests of the arsenic rich iron sludge and the solidified sludge with cement indicates that arsenic leaching ratio of sludge ranges between 3 and 13 % and that of cement stabilized sludge is between 1 and 6 %. This means that the arsenic has a strong bond with the iron sludge and its treatment may not be difficult.


    Author Information:

    Hussainuzzaman, MM
    Ph.D. Student, University of Miyazaki, Miyazaki,

    Yokota, H
    Professor, University of Miyazaki, Miyazaki,


    Stock #: JAI13324

    ISSN: 1546-962X

    DOI: 10.1520/JAI13324

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    Author
    Title Efficiency of Arsenic Removal Unit Working in Bangladesh and Cement Stabilization of Its Sludge
    Symposium Contaminated Sediments: Evaluation and Remediation Techniques, 2006-05-25
    Committee D18