Unlocking the Potential of Biochar: A Comprehensive Analysis of its Role in Heavy Metal Remediation in Aquatic Environments

Explore the groundbreaking use of biochar for removing heavy metals from water bodies. This comprehensive study, utilizing bibliometric analysis, identifies research trends, popular topics like biochar reusability, and highlights the versatile applications of biochar, offering insights, but also revealing crucial knowledge gaps for future investigation.

February 11, 2024

1–2 minutes

Phiri, Moja, et al (2024) Utilization of biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More for remediation of heavy metals in aqueous environments: A review and bibliometric analysis. Heliyon. https://doi.org/10.1016/j.heliyon.2024.e25785

The global concern over heavy metal contamination in water bodies has sparked innovative research, with biochar emerging as a promising solution. In a recent study, researchers explored the potential of using biochar to remove heavy metals from aqueous environments. The investigation focused on metals such as Cr(VI), Pb(II), Cd(II), and Cu(II), revealing a growing scholarly interest in this field.

To gain a comprehensive understanding, the researchers employed bibliometric analysis, merging data from Scopus and the Web of Science Core Collection databases. The study, conducted between 2010 and 2022, identified five main clusters in the research, including adsorption, water treatment, adsorption models, analytical techniques, and hydrothermal carbonization. Keyword co-occurrence analysis highlighted trending topics like biochar reusability, modification, acid mine drainage, wastewater treatment, and hydrochar.

Biochar, a product of biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More carbonization, showed potential due to its versatile physical and chemical characteristics. With a stable carbon structure and strong adsorption properties, biochar becomes an effective and sustainable adsorbent for heavy metals. The study emphasized its low-cost, renewable nature, making it a valuable tool for wastewater treatment, soil improvement, carbon sequestration, and energy production.

The research also explored applications beyond heavy metal removal, showcasing the reutilization of heavy metal-loaded spent biochar in electrodes for supercapacitors or stable catalyst materials. While various wastewater treatment techniques exist, the study highlighted biochar’s operational flexibility, cost-effectiveness, and high efficiency in comparison.

Despite progress, the study identified knowledge gaps and limitations in the current understanding of biochar-based heavy metal remediation. To address these gaps, the researchers suggested future investigations into areas like biochar production, modification, adsorption mechanisms, environmental impact, and reusability.

In conclusion, the study provides a comprehensive overview of biochar’s role in heavy metal remediation in aquatic environments. By employing bibliometric analysis, the research not only showcases current trends and applications but also directs attention to areas where further exploration is needed. Harnessing the potential of biochar emerges as a sustainable and promising solution to combat the pressing issue of heavy metal contamination in water.