Date fruit has a significant role in Sahara countries' economies. In this study, a bunch of empty dates waste was used to produce biochar, which will be used to adsorb Eriochrome black T (EBT) and methylene blue (MB) dyes from aqueous solution. The dates bunch was washed, dried, and ground into small particles. Then it was heated in a muffle furnace at 850 °C. The biochar from empty date bunches (BEDB) characteristics before and after adsorption was determined by using scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The experiment has used different parameters notably initial concentration (25 – 100 mg L-1), contact time (0 – 90 min), BEDB amount (0.01 – 0.05 g), and different solutions pH (2 – 10) in batch adsorption. This investigation has shown that Langmuir and pseudo-second-order isotherm models were well-fitted than Freundlich and pseudo-first-order. The maximum capacity of adsorption was 58.47 and 80.64 mg g-1 for EBT and MB removal, respectively at 25°C. The results obtained show that BEDB sorbent has an important adsorption capacity of dyes removal and has a performance to eliminate EBT and MB dyes from aqueous solution.

This paper studies the efficiency of biochar prepared from waste verbena foumanat (BWV) to adsorb phenolfrom aqueous solution. The waste verbena foumanat were collected from cafeterias, after then it was washedand dried at 70 °C. The dried verbena carbonized in muffle furnace at 800 °C. The characterizations of BWVbefore and after sorption were determined by using scanning electron microscopy (SEM) and Fouriertransform infrared (FTIR). Batch adsorption process were conducted at contact time (0 – 120 min), BWVamount (0.2 to 1 gl-1), phenol initial concentration (25 - 150 mgl-1), pH solutions (2 – 12) and temperature (20– 50°C). The adsorption isotherm and the kinetic models were used in these investigations to fit dataanalysisBWV equilibrium data was fitted by Freundlich isotherm model. Although, a pseudo-second orderwas the better model to fit the adsorption kinetic. The maximum adsorption capacity calculated was 43.29mgg-1. The following investigation indicates that biochar from waste verbena (BWV) is an effective adsorbentwith an important adsorption capacity. It could be used as bio sorbent to eliminate phenol from industrialwastewater.