Textile wastewater, known for its high organic load, salinity, and toxic compounds, poses a significant environmental challenge. While constructed wetlands (CWs) are a low-cost and sustainable treatment option, their efficiency can be improved. A recent study explored the use 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 the wetland plant Phragmites, to enhance the pollutant removal capabilities of horizontal flow constructed wetlands (HFCWs).

Researchers established three HFCW setups: one without vegetation, one with Phragmites but no biochar, and one with both Phragmites and biochar. The biochar-amended wetland outperformed the others, achieving an 83.45% reduction in chemical oxygen demand (COD) and a 73.98% decrease in color within 72 hours. These results were significantly better than the non-amended system, which reduced COD by 73.71% and color by 53.81%.

Biochar’s porous structure and high surface area make it an effective adsorbent, slowing contaminant movement and enhancing plant and microbial interactions. However, potassium removal was slightly lower in the biochar system due to ion leachingLeaching is the process where nutrients are dissolved and carried away from the soil by water. This can lead to nutrient depletion and environmental pollution. Biochar can help reduce leaching by improving nutrient retention in the soil.   More.

This study highlights the dual benefits of biochar: it improves wetland performance while repurposing spent plant 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, aligning with sustainable and circular bioeconomy principles. The findings suggest that integrating biochar into constructed wetlands offers a cost-effective and eco-friendly solution for textile wastewater remediation.

By demonstrating the potential of biochar-enhanced wetlands, this research contributes to advancing sustainable practices in industrial wastewater management.