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Formaldehyde Adsorption-Desorption of Poplar Bark
Zoltán Pásztory1, Katalin Halász2, Zoltán Börcsök1
1Innovation Center, University of Sopron, 4 Bajcsy Zs. str., Sopron, 9400, Hungary.
Bulletin of Environmental Contamination and Toxicology
|September 26, 2019
Summary
Populus × euramericana cv. Pannónia bark effectively adsorbs formaldehyde, reaching equilibrium within days. This bark can act as a formaldehyde sink, though some residual formaldehyde is released over time.
Area of Science:
- Wood Science
- Environmental Chemistry
Background:
- Formaldehyde is a common indoor air pollutant.
- Poplar bark's potential for formaldehyde adsorption is not well-understood.
Purpose of the Study:
- To investigate formaldehyde adsorption and desorption by Populus × euramericana cv. Pannónia bark.
- To determine the kinetics and equilibrium of formaldehyde binding to poplar bark.
Main Methods:
- Poplar bark prisms were exposed to a formaldehyde-contaminated atmosphere for varying durations (1-36 days).
- Quantified adsorbed and desorbed formaldehyde using analytical methods.
- Measured initial formaldehyde content in uncontaminated bark.
Main Results:
- Uncontaminated bark had 0.0036 mg/g formaldehyde.
- Formaldehyde adsorption followed a saturation curve, reaching an equilibrium of 0.9 mg HCHO/g bark.
- Formaldehyde emission from contaminated bark followed an exponential decay, with residual content remaining.
Conclusions:
- Poplar bark demonstrates significant formaldehyde adsorption capacity.
- The adsorption process reaches equilibrium, indicating a potential use in formaldehyde remediation.
- A portion of adsorbed formaldehyde is persistently retained by the bark.
