Biochar From Agricultural Waste Products Can Adsorb Wastewater Contaminants

Biochar — a charcoal-like substance made primarily from agricultural waste products — holds promise for removing emerging contaminants such as pharmaceuticals from treated wastewater. That's the conclusion of a team of researchers that conducted a novel study that evaluated and compared the ability of biochar derived from two common leftover agricultural materials — cotton gin waste and guayule bagasse — to adsorb three common pharmaceutical compounds from an aqueous solution. Guayule, a shrub that grows in the arid Southwest, provided the waste for one of the biochars tested in the research. More properly called Parthenium argentatum, it has been cultivated as a source of rubber and