Summary
This narrative review examines nanomaterial-modified biochar—particularly biochar supported with metal nanoparticles—as an approach to overcome inherent limitations of pristine biochar in environmental remediation. The authors provide a comprehensive overview of synthesis and characterisation methods, applications across multiple environmental matrices, and underlying removal mechanisms, whilst critically assessing practical advantages and remaining technical and deployment challenges. The work contributes to understanding how nanomaterial incorporation can enhance biochar's adsorptive capacity, pH adaptability and resistance to competing ions, though field-scale applicability remains largely undetermined.
UK applicability
The findings are relevant to UK soil and water remediation contexts, particularly where heavy metal contamination or organic pollutants pose risks to land reuse and environmental protection. However, the review's focus on laboratory and bench-scale synthesis and characterisation suggests that practical adoption in UK farming systems or environmental remediation projects would require field-scale validation and cost-effectiveness analysis specific to UK conditions.
Key measures
Adsorption capacity, pH adaptability, removal efficiency for heavy metals and organic contaminants, resistance to competing ions, synthesis and characterisation methods
Outcomes reported
This narrative review synthesised evidence on the synthesis, characterisation, and application of nanomaterial-modified biochar—particularly biochar supported with metal nanoparticles—for removing heavy metals, organic contaminants, and inorganic pollutants from aqueous, soil, and air environments. The review evaluated underlying removal mechanisms, practical advantages, and technical and deployment challenges.
Topic tags
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