Activated carbon prepared from soybean straw for phenol adsorption

作者：Miao, Qingqing; Tang, Yingmao; Xu, Jing; Liu, Xinping; Xiao, Liren; Chen, Qinghua^*

来源：Journal of the Taiwan Institute of Chemical Engineers, 2013, 44(3): 458-465.

DOI：10.1016/j.jtice.2012.12.006

• Activated carbon (AC)
• Soybean straw (SS)
• Zinc chloride (ZnCl2)
• Activation

Soybean [Glycine max (L) Men.] straw (SS) was employed as a precursor for the preparation of activated carbon by zinc chloride (ZnCl2) activation. Thermogravimetric analysis (TGA) of ZnCl2, SS and ZnCl2/SS mixtures were carried out. And the morphology of the activated carbon derived from soybean straw (SSAC) was tested by scanning electron microscopy (SEM). The nitrogen adsorption-desorption experiments were performed at 77 K to determine the pore structure of SSAC. alpha(s)-plot and DR-plot were used to calculate the micropore volume of SSAC to investigate the effect of the additive amount of ZnCl2 on the pore structure. It was shown that the maximum surface area of SSAC calculated by BET was as high as 2271 m(2)/g. The pore distribution analyzed by BJH was between 1.73 and 3.95 nm. The Langmuir and Freundlich equilibrium isotherm theories were applied to describe phenol adsorption respectively. Maximum monolayer adsorption capacity of phenol was 278 mg/g. The value of R-L was found to be below 1.0, indicating that the resultant activated carbon was favorable for phenol adsorption.

• 出版日期2013-5
• 单位福建师范大学