Removal of contaminants of emerging concern from multicomponent systems using carbon dioxide activated biochar from lignocellulosic feedstocks

• Adsorption from multicomponent CEC solution by three activated biochars was studied. Biochar porosity and hydrophobicity both influenced the removal efficiency. Predominantly microporous peach stone biochar showed lowest overall capacity. Hydrophilic CECs adsorbed best on ash-rich wheat straw biochars. of hydrophobic highest softwood biochar. six contaminants emerging concern (CECs) – caffeine, chloramphenicol, carbamazepine, bisphenol A, diclofenac, triclosan a studied using obtained lignocellulosic feedstocks: straw, softwood, stones. Structural parameters related to ash content properties were found influence adsorption For biochar, activation resulted in more developed mesoporosity, whereas increased only microporosity. The most hydrophilic studied, caffeine displayed (22.8 11.3 mg g ?1 ) onto which had adsorbents (20 wt%). A triclosan, relatively substances, (31.6 30.2 well-developed mesoporosity low content.