Adsorption of volatile organic vapors by activated carbon derived from rice husk under various humidity conditions and its statistical evaluation by linear solvation energy relationships
Journal
Separation and Purification Technology
Journal Volume
170
Journal Volume
170
Pages
102-108
Start Page
102
End Page
108
ISSN
13835866
Date Issued
2016-10-01
Author(s)
Abstract
The adsorption of sixteen volatile organic compounds (VOCs) in the gas phase by activated carbon (AC) generated from waste rice husk was investigated under two different levels of relative humidity (RH) by inverse gas chromatography (IGC). R850 AC had the largest surface area and was characterized. Linear solvation energy relationship (LSER) was employed to understand the interactions between R850 AC and VOCs. The major functional groups on the surface of R850 AC were C=C, Si-O-Si, O-H, and C-O(H). IGC indicated that the gas/solid adsorption coefficients (log Kd) for the 16 VOCs lied in the range 4.0-6.1 (g g-1)/(g mL-1) under medium RH (around 55%), but decreased under high RH (90%). Moreover, the log Kd value predicted from our LSER equations was highly correlated to the experimental log Kd of the R850 AC. This study demonstrates that R850 AC is a promising material for VOC removal and the established LSER equations are useful to estimate VOC adsorption.
Subjects
Activated carbon
Adsorption
Agricultural biowastes
Linear solvation energy relationship
Volatile organic compound
SDGs
Publisher
Elsevier B.V.
Type
journal article