Zdenka Kwoczynski and colleagues, in their study published in 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 Conversion and Biorefinery , explore the potential of wheat dust (WD) and hexane-extracted rapeseed scrap (RS) 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 in promoting sustainable waste utilization. Their research highlights how these agricultural residues, when converted into biochar, can serve as effective soil amendments or adsorbents for organic pollutants.

The study involved pyrolyzing WD and RS to produce biochars, followed by steam activation at 350°C and 450°C. Structural analysis revealed that WD biochar developed a higher specific surface area , making it a promising adsorbent for contaminants like pesticides, dyes, and pharmaceuticals. Its well-developed pore structure and functional groups suggest strong adsorption capabilities, while its neutral pHpH is a measure of how acidic or alkaline a substance is. A pH of 7 is neutral, while lower pH values indicate acidity and higher values indicate alkalinity. Biochars are normally alkaline and can influence soil pH, often increasing it, which can be beneficial More ensures minimal impact on soil chemistry.

On the other hand, RS biochar exhibited exceptional nutrient content, with high levels of nitrogen , phosphorus , potassium , calcium, and magnesium. With a remarkable cation exchange capacity (CEC) , RS biochar enhances soil fertility, improves microbial activity, and supports long-term soil health.

This research underscores biochar’s role in the circular economy by converting agricultural waste into valuable materials for environmental remediation. WD biochar is best suited for wastewater treatment, while RS biochar can improve soil productivity. Future studies should explore large-scale applications and long-term effects on ecosystem sustainability.

SOURCE: Kwoczynski, Z., Burdová, H., Al Souki, K. S., & Čmelík, J. (2025). Wheat dust and extracted rapeseed scrap biochar: A comprehensive characterization and assessment of potential utilization in the context of the circular economy. Biomass Conversion and Biorefinery. https://doi.org/10.1007/s13399-025-06524-6