Preparation and Application of Efficient Biobased Carbon Adsorbents Prepared from Spruce Bark Residues for Efficient Removal of Reactive Dyes and Colors from Synthetic Effluents

Biobased carbon materials (BBC) obtained from Norway spruce (Picea abies Karst.) bark was produced by single-step chemical activation with ZnCl2 or KOH, and pyrolysis at 800 °C for one hour. The reagent had a significant impact on the properties of BBCs. KOH-biobased material (KOH-BBC) higher specific surface area (SBET), equal to 1067 m2 g?1, larger pore volume (0.558 cm3 g?1), more mesopores, hydrophilic than ZnCl2-BBC. However, yield KOH-BBC 63% lower Batch adsorption experiments were performed evaluate ability two BBCs remove dyes, reactive orange 16 (RO-16) blue 4 (RB-4), treat synthetic effluents. general order model most suitable modeling kinetics both dyes equilibrium parameters 22 calculated using Liu model. Upon RO-16, Qmax 90.1 mg g?1 ZnCl2-BBC 354.8 KOH-BBC. With RB-4, 332.9 582.5 Based characterization experimental data, it suggested that electrostatic interactions hydrogen bonds between RO-16 RB-4 played crucial role in process. biobased showed high efficiency removing comparable best examples literature. Additionally, KOH- purify effluents, but superior.