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

Microorganisms, Journal Year: 2025, Volume and Issue: 13(1), P. 174 - 174

Published: Jan. 15, 2025

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 bacterial growth, urease activity, calcite formation compared to nutrient broth brown sugar media. Optimal MICP conditions, at pH 8–9 30 °C, supported efficient biomineralization. The process facilitated removal Cd2+ (99.10%) Ni2+ (78.33%) while producing stable crystals that enhanced strength. Thermal analyses (thermogravimetric analysis (TGA) differential scanning calorimetry (DSC)) confirmed successful production CaCO3 its role in improving stability. DSC revealed endothermic exothermic peaks, including a significant peak 444 corresponding thermal decomposition into CO2 CaO, confirming formation. TGA results showed steady weight loss, consistent with breakdown CaCO3, supporting carbonates. treatment significantly increased strength, highest surface strength observed 440 psi, correlating content (18.83%). These findings underscore effectiveness stabilization, pollutant removal, geotechnical properties.

Language: Английский

Using Machine Learning to Identify Environmental Factors that Collectively Determine Microbial Community Structure of Activated Sludge

Environmental Research, Journal Year: 2024, Volume and Issue: 260, P. 119635 - 119635

Published: July 16, 2024

Language: Английский