Adsorptive removal of atmospheric pollutants over Pyropia tenera chars
관리자2016-08-01조회 2932
As a replacement for activated carbon, biochar was synthesized and used for the adsorptive
removal of formaldehyde and nitrogen oxide. Biochar was produced from the fast pyrolysis
of the red marine macro alga, Pyropia tenera. The P. tenera char was then activated with
steam, ammonia and KOH to alter its characteristics. The adsorption of formaldehyde, which
is one of the main indoor air pollutants, onto the seaweed char was performed using 1-ppm
formaldehyde and the char was activated using a range of methods. The char activated with
both the KOH and ammonia treatments showed the highest adsorptive removal efficiency,
followed by KOH-treated char, ammonia-treated char, steam-treated char, and non-activated
char. The removal of 1000-ppm NO over untreated char, KOH-treated char, and activated
carbon was also tested. While the untreated char exhibited little activity, the KOH-treated
char removed 80% of the NO at 50°C, which was an even higher NO removal efficiency than
that achieved by activated carbon.
Key words: Pyropia tenera char, activation,
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