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    Can microbially induced calcite precipitation (MICP) through a ureolytic pathway be successfully applied for removing heavy metals from wastewaters?

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    Torres, Duarte, Azócar, Mella, Rivas, Jeison Can microbially...).pdf (972.6Kb)
    Date
    2018-11
    Author
    Torres-Aravena, Álvaro Esteban
    Duarte-Nass, Carla
    Azócar, Laura
    Mella-Herrera, Rodrigo
    Rivas, Mariella
    Jeison, David
    Publisher
    MDPI
    Description
    Artículo de publicación ISI
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    Abstract
    Microbially induced calcite precipitation (MICP) through a ureolytic pathway is a process that promotes calcite precipitation as a result of the urease enzymatic activity of several microorganisms. It has been studied for different technological applications, such as soil bio-consolidation, bio-cementation, CO2 sequestration, among others. Recently, this process has been proposed as a possible process for removing heavy metals from contaminated soils. However, no research has been reported dealing with the MICP process for heavy metal removal from wastewater/waters. This (re)view proposes to consider to such possibility. The main characteristics of MICP are presented and discussed. The precipitation of heavy metals contained in wastewaters/waters via MICP is exanimated based on process characteristics. Moreover, challenges for its successful implementation are discussed, such as the heavy metal tolerance of inoculum, ammonium release as product of urea hydrolysis, and so on. A semi-continuous operation in two steps (cell growth and bio-precipitation) is proposed. Finally, the wastewater from some typical industries releasing heavy metals are examined, discussing the technical barriers and feasibility.
    URI
    http://repositoriodigital.ucsc.cl/handle/25022009/1872
    Ir a texto completo en URI:
    https://doi.org/10.3390/cryst8110438
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