Urease-catalyzed microbial and enzymatic carbonate precipitation for eco-friendly heavy metal remediation.

Heavy metal contamination significantly threatens environmental and public health, necessitating effective and sustainable remediation technologies. This review explores two innovative bioremediation techniques: microbially induced calcium carbonate precipitation (MICP) and enzyme-induced calcium carbonate precipitation (EICP). Both techniques show promise for immobilizing heavy metals in laboratory and field settings.

Enhanced MICP for Soil Improvement and Heavy Metal Remediation: Insights from Landfill Leachate-Derived Ureolytic Bacterial Consortium.

This study investigates the potential of microbial-induced calcium carbonate precipitation (MICP) for soil stabilization and heavy metal immobilization, utilizing landfill leachate-derived ureolytic consortium. Experimental conditions identified yeast extract-based media as most effective for bacterial growth, urease activity, and calcite formation compared to nutrient broth and brown sugar media. Optimal MICP conditions, at pH 8-9 and 30 °C, supported the most efficient biomineralization.