Recent study published in Universitas Scientiarum, Gallego-Ramírez, Chica, and Rubio-Clemente explored the effectiveness 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, derived from Pinus patula pellets, in removing Crystal Violet (CV) dye from water. Biochar has shown promise as an adsorbent material for eliminating various water contaminants, including dyes. The study also investigated the regeneration capacity of biochar, which is crucial for its cost-effectiveness and sustainable application.  

The study revealed that biochar derived from Pinus patula pellets is highly effective in removing CV from water. Under optimal conditions, biochar removed more than 99.9% of the CV dye within 3 minutes. The rapid removal rate indicates a strong affinity between the biochar’s active sites and the CV molecules.  

The researchers explored various chemical reagents to regenerate the biochar, aiming to recover its adsorption capacity. The most effective solvent for desorbing CV from the biochar surface was a 95:5 mixture of 96% ethanol and concentrated acetic acid, achieving a desorption efficiency of 21.1%.  

The study further assessed the reusability of biochar through six consecutive adsorption-desorption cycles. While the biochar’s removal efficiency decreased over these cycles, it still maintained 54.4% removal efficiency after the sixth cycle. This indicates that biochar has a good regeneration capacity and can be reused multiple times, which can help reduce the costs associated with water treatment.  

The findings suggest that biochar is a promising material for sustainable and cost-effective removal of Crystal Violet dye from water. Its high removal efficiency and regeneration capacity make it a viable alternative to more expensive adsorbents. The use of biochar in wastewater treatment aligns with the principles of a circular bioeconomy, turning waste 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 into a valuable resource.  

Source: Gallego-Ramírez C, Chica E, Rubio-Clemente A. Regeneration of Pinus patula-derived biochar employed in crystal violet removal in water, Universitas Scientiarum, 30: 22-38, 2025.