Bioremediation of multiple heavy metals through biostimulation of microbial-induced calcite precipitation at varying calcium-to-urea concentrations
Carla Comadran‐Casas, Cise Unluer, Adrian M. Bass, John MacDonald, Elmira Khaksar Najafi, Liene Spruženiece, Caroline Gauchotte‐Lindsay
Abstract
= 0-50 mM (∼9) compared to 333 mM (∼8.5) favoured partition of Pb into the oxyhydroxide fraction. Instead, partition of Zn, Mn, Sr and Ba into the soil carbonate fraction increased with increasing calcium, whilst there was no evidence of Al carbonation. The results of this study evidence the feasibility of biostimulation approaches to remediate multiple contaminants simultaneously through MICP, provide insights into multiple element's behaviour during urea hydrolysis and MICP and demonstrate carbon and element mineralisation are maximised at equimolar calcium-to-urea ratio of 333 mM.
Topics & Concepts
BiostimulationBioremediationCalciteEnvironmental chemistryPrecipitationCalciumChemistryUreaEnvironmental scienceGeologyMineralogyBacteriaBiochemistryMeteorologyPaleontologyPhysicsOrganic chemistryMicrobial Applications in Construction MaterialsMine drainage and remediation techniquesMicrobial Fuel Cells and Bioremediation