Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
Volume 1, Issue 1, Pages 60-64Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ez400165g
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- Australian Research Council via its Discovery Projects Scheme
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This study reports the aerodynamic properties of ground biochar particles produced from the slow pyrolysis of mallee biomass at 400 degrees C, considering grinding times from 10 s to 16 min. The data show that extensive grinding (e.g., >= 1 min) substantially increases the amounts of particulate matter with an aerodynamic diameter of <10 mu m (PM10) and <2.5 mu m (PM2.5) in the ground biochars. Whereas the aerodynamic particle size distribution (PSD) of PK in biochar after grinding for 10 s shows no obvious peak, a bimodal PSD is observed for PM10 in the biochars after grinding for 1-16 min. The results suggest that care must be taken during biochar grinding to minimize the PM10 and PM2.5 produced. PK10 and PM2.5 in a biochar should also be quantified to assess environmental risks during biochar transport and applications.
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