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Biochars as effective sorbents for pollutant removal.
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This study tested four biochar sorbents—derived from sunflower husks, seaweed, microalgae, and commercial activated carbon—for removing diclofenac and triclosan from water at environmentally relevant concentrations. Results found that all biochar sorbents performed comparably to activated carbon, with waste-derived biochars offering a cost-effective alternative for contaminant removal.
Contaminants in water, various drugs, detergents or microplastics, have been a constant problem. One of the effective methods of their removal is sorption by various active sorbents such as biochar. Four various sorbents were tested in this study. Three biochars prepared from different waste plant biomass (sunflower husks, seaweed and microalgae) and commercial activated carbon - Supersorbon. The effectiveness of the sorbents was tested by diclofenac (active substance) and triclosan (disinfectant) removal. The concentration 1 ppm, which corresponed to the commonly occurring concentration was chosen for tests. Based on obtained results, it was found that all biochar sorbents were comparatively effective as activated carbon and thanks to their lower price, also economically advantageous.
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