“…The large adsorption capacity of CNTs has been mainly attributable to their pore structure, surface area and the existence of a wide spectrum of surface functional groups [24]. CNTs surface area is approximately as large as that of activated carbon, their advantage lies in the fact that they have a better arrangement of carbon atom [25]. In addition, the superior adsorption capacity of CNTs compared to activated carbon is credited to the presence of aggregated pores with large mesopores volume and the presence of less negative surface charge [26].…”