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 (BC) is gaining recognition as a powerful tool in tackling environmental issues. In a comprehensive review published in Green Technologies and Sustainability, researchers Farah Amalina and colleagues explore how BC—produced through the pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More of biomass—can revolutionize agriculture, water treatment, and renewable energy.

Biochar’s benefits start with soil. Rich in carbon, it improves fertility, retains moisture, and enhances microbial activity. Farmers can use BC to increase crop yields while reducing the need for chemical fertilizers. But its applications don’t stop at agriculture. In water treatment, BC removes pollutants, including heavy metals and organic contaminants, thanks to its porous structure and adsorption properties.

One of the most exciting developments in BC research is the rise of nano-biochar. By modifying BC at the nanoscale, scientists are improving its capacity to filter pollutants and store energy. This could open new doors for sustainable wastewater treatment and carbon sequestration technologies. Additionally, the integration of BC into energy production—such as co-firing with biomass—offers a cleaner alternative to fossil fuels, further reducing greenhouse gas emissions.

However, challenges remain. The composition and effectiveness of BC vary depending on the 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 source and pyrolysis conditionsThe conditions under which pyrolysis takes place, such as temperature, heating rate, and residence time, can significantly affect the properties of the biochar produced.   More. Some forms of BC may introduce contaminants into the soil, necessitating strict quality standards. Ongoing research is refining production techniques to ensure safety, efficiency, and scalability.

With its multifunctional applications, BC stands at the intersection of sustainability and innovation. As research advances, it could become a key player in the global transition to greener practices.

SOURCE: Amalina, F., Krishnan, S., Zularisam, A.W., & Nasrullah, M. (2025). An extensive analysis and environmental sustainability applications of multifunctional biochar developments: Current trends and technological advances. Green Technologies and Sustainability, 3, 100174. https://doi.org/10.1016/j.grets.2025.100174