Abstract
Floatable activated carbon (AC) monoliths were fabricated from waste printing paper (WPP) using a facile method. Coal tar pitch (CTP) and K2CO3 were adopted as the additive and activation agent, respectively. The AC monolith was characterized by N2-adsorption/desorption, Fourier transform infrared spectroscopy and Raman spectroscopy. The adsorption isotherms of methylene blue by the AC monolith were also investigated. The experimental data demonstrated that the product had a high surface area up to 2007 m2 g−1 and a total pore volume of 1.207 cm3 g−1. The addition of CTP led to a higher mechanical rigidity and the formation of more micropores compared with the single WPP. Also, the AC monolith had a more developed aromatic structure caused by adding CTP. The adsorption equilibrium data followed Langmuir model with a high monolayer adsorption capacity up to 699 mg g−1. This study provides a reference for the utilization of WPP as a promising precursor of floatable AC monolith, which has the potential to be used as a high-performance and easy-separation adsorbent due to its high surface area and excellent floatability.
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