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Volume 3, Issue 2 (Suppl)
Trends in Green chem
ISSN: 2471-9889
Environmental & Green Chemistry 2017
July 24-26, 2017
Page 107
5
th
International Conference on
6
th
International Conference on
July 24-26, 2017 Rome, Italy
Environmental Chemistry and Engineering
Green Chemistry and Technology
&
Hydrophobic sorption of the soil treated with
giant Miscanthus
-derived biochar as a function of
aging period
Seunghun Hyun, Chanyang Kim
and
Juhee Kim
Korea University, South Korea
B
iochar produced from at three different pyrolysis temperatures (400ºC, 500ºC and 700ºC) of giant miscanthus was treated
in the ratio of 5% (w/w) in soil (namely, GMC-400, GMC-500, and GMC-700, respectively) and their sorption (kinetics
and isotherm) with two hydrophobic model solutes (phenanthrene (PHE) and 9-phenanthrol (9-PTR)) was evaluated as a
function of aging periods (0, 3, and 6 months). Physicochemical properties of samples were assessed through the analyses
of elemental composition, FT-IR, and SEM. The magnitude of PHE sorption (Kd) by samples was in the order of GMC-
500
≥
GMC-400>>GMC-700. Sorption kinetics of PHE was apparently biphasic and GMC-500 had the largest slow sorption
domain. Field aging resulted in the decreased PHE sorption (Kd) over time. Sorption of 9-PTR also decreased over time
whereas its hydrophilic sorption increased from 20% up to 30% with aging period. Analyses of FTIR and SEM show that the
number of O-containing functional groups increased and the deformation (or blockage) of micropores occurred after 6months.
The aging effect was most apparent for GMC-500. The result of this study strongly supports that giant miscanthus–biochar
produced at 500ºC is efficient adsorbent for both PHE and 9-PTR, due to its large hydrophobic surface and microporous
structure. However, the sample surface became less hydrophobic due to the formation of hydrophilic functional group and the
deformation of microporous structure over time due to weathering processes.
Biography
Seunghun Hyun is a Professor in the Department of Environmental Science and Ecological Engineering at Korea University since 2006. He received PhD degree
from Purdue University in 2003, and received both BS and MS degrees from Korea University. His expertise is contaminant fate/clean-up in contaminated sites
such as abandoned mines, landfills, spilled sites, etc. His recent research project funded by Korean Government is “Assessing long-term fate of heavy metal by
understanding non-equilibrium characteristics of natural attenuation process”.
soilhyun@korea.ac.krSeunghun Hyun et al., Trends in Green chem, 3:2
DOI: 10.21767/2471-9889-C1-003