ArticleFrontiers in microbiology2026
Biochar and urea enhance phytoremediation of PAH-Pb co-contaminated karst soil: bacterial and metabolic insights.
Article in Frontiers in microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The remediation of polycyclic aromatic hydrocarbon and lead co-contaminated soils in karst regions remains challenging because of strong soil buffering capacity, complex metal speciation, and the distinct transformation mechanisms of organic pollutants and heavy metals. Although urea and biochar are widely used as soil amendments, their interactive effects on plant-assisted remediation and the associated rhizosphere microbial and metabolic mechanisms remain unclear. In this study, urea and biochar were co-applied in a ryegrass pot experiment to evaluate their synergistic effects on the remediation of PAH and Pb co-contaminated karst soil. The combined treatments significantly enhanced PAH degradation within 80 days, with PBCN and PN achieving the highest degradation efficiencies of 49.5 and 38.4%, respectively. Biochar-plant integration also markedly reduced Pb availability, with PBCN showing the greatest reduction, reaching 24.52 mg kg
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