Mohammed A. A , Arivalagan Pugazhendhi , 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 Wastewater Treat- ment: Addressing Contaminants and Enhancing Sustainability: Challenges and Solutions, Journal of Hazardous Materials Advances (2024), doi: https://doi.org/10.1016/j.hazadv.2024.100504

Biochar is gaining recognition for its effectiveness in treating wastewater by addressing a range of contaminants. Derived from organic materials through 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, biochar is known for its high adsorption capacity due to its large surface area and porous structure. It is particularly effective in removing pollutants like heavy metals, nutrients, and emerging contaminants such as antibiotic-resistant bacteria.

When used in fixed filter columns, biochar has been shown to remove up to 80% of Chemical Oxygen Demand (COD), 71% of nitrogen-ammonium, and 57% of phosphorus-phosphate from wastewater, while also reducing pathogens. The efficacy of biochar depends on factors such as the type 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 used 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. Chemical modifications can further enhance biochar’s ability to absorb pollutants, making it a versatile tool in wastewater management.

In addition to wastewater treatment, biochar contributes to sustainability by utilizing waste materials and supporting bioenergy production. It can also improve soil health when used as a soil amendmentA soil amendment is any material added to the soil to enhance its physical or chemical properties, improving its suitability for plant growth. Biochar is considered a soil amendment as it can improve soil structure, water retention, nutrient availability, and microbial activity.   More, promoting nutrient retention and microbial activity.

However, there are challenges, such as biochar’s physical degradation over time and the need for optimizing its long-term performance in real-world applications. Ongoing research focuses on improving the durability and pollutant removal efficiency of biochar through chemical and physical modifications, making it a promising solution for sustainable water management and pollution control.