Valorizing Waste Bamboo Tar to Novel Bead Carbonaceous Adsorbent for Volatile Organic Compound Removal
Journal
Journal of Environmental Engineering (United States)
Journal Volume
145
Journal Issue
12
Date Issued
2019
Author(s)
Abstract
Activated phenol-formaldehyde (PF) beads were successfully synthesized using waste bamboo tar as the raw material via suspension polymerization method and adequate carbonization and activation. The activated PF beads were then examined by toluene adsorption tests at 2,500–20,000 ppmv by using a thermogravimetric system at operating temperatures between 25°C and 90°C. Saturated activated PF beads were also regenerated under 150°C for five cycles to understand their feasibility for adsorption-desorption applications. The experimental results showed that the activated PF beads with specific surface area >600 m2/g were achieved, mostly contributed by micropores. Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherm models could well fit the toluene adsorption data, with the Langmuir isotherm being the most suitable (R2>0.999). Superior thermal regeneration efficiency after five adsorption-desorption cycles further suggests that the activated PF beads derived from waste bamboo tar have great potential to recover volatile organic compounds from solvents for industrial applications.
Type
journal article