Can Microbially Induced Calcite Precipitation (MICP) through a Ureolytic Pathway Be Successfully Applied for Removing Heavy Metals from Wastewaters?
| Autor: | Laura Azócar, Carla Duarte-Nass, Rodrigo Mella-Herrera, Mariella Rivas, Álvaro Torres-Aravena, David Jeison |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
General Chemical Engineering 010501 environmental sciences 01 natural sciences Inorganic Chemistry 03 medical and health sciences chemistry.chemical_compound lcsh:QD901-999 calcium carbonate General Materials Science Ammonium heavy metals 0105 earth and related environmental sciences Calcite microbially induced calcite precipitation (MICP) Precipitation (chemistry) Ammonia volatilization from urea bioprecipitation Condensed Matter Physics wastewater treatment 030104 developmental biology Calcium carbonate Wastewater chemistry Bioprecipitation Environmental chemistry Sewage treatment lcsh:Crystallography |
| Zdroj: | Crystals, Vol 8, Iss 11, p 438 (2018) |
| ISSN: | 2073-4352 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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