Partic. vol. 10 no. 1 pp. 35-41 (February 2012)
doi: 10.1016/j.partic.2011.05.006

Porous carbon from vinegar lees for phenol adsorption

Mei Zhong^a,b, Yin Wang^a,*,Jian Yu^a, Yajun Tian^a, Guangwen Xu^a,*

wangyin@home.ipe.ac.cngwxu@home.ipe.ac.cn

Abstract

An effective technology for utilizing vinegar lees (VL), a biomass waste generated during its production, is much needed in China due to the huge consumption of vinegar. This study investigates the preparation of porous carbon (PC) from VL, now reporting on the adsorption capability of PC in removing phenol from its aqueous solution. The preparation of PC consists of carbonization of VL in N₂ and activation in CO₂. The results show that the optimal activation temperature and time in CO₂ for VL char carbonized at 800°C were 875°C and 1 h, respectively. The PC prepared was found to have large specific surface area and micropore volume, with an adsorptive capacity for phenol from its aqueous solution much higher than that of commercial coconut shell activated carbon (CSAC). Adsorption of phenol from its aqueous solution by the VL-based PC was found to follow the isothermal Langmuir equation.

Graphical abstract

Keywords

Porous carbon; Carbonization; Vinegar lees; Phenol; Waste water