5 / 18
Environmental Science & Technology 2018
Journal of Environmental Research
Page 47
March 29-31, 2018
Vienna, Austria
4
th
Edition of International Conference on
Environmental Science
& Technology 2018
I
ron salts (e.g., FeCl
3
, FeSO
4
.7H
2
O and PFCl) have been
used widely as coagulant in drinking water treatment plant
for removal of turbidity, color and natural organic matters.
Simultaneously, large amounts of iron rich sludge are produced
by drinking water treatment plants worldwide. Considering the
high iron (ferric hydroxide) concentration in sludge, it could be
beneficially reused as iron source with tremendous potential to
prepare ferric oxide for catalysis of oxidation process. Persulfate
[e.g. peroxydisulfate (PDS) and peroxymonosulfate (PMS)] has
been increasingly recognized as a viable, alternative oxidation
process for
in situ
chemical oxidation (ISCO), groundwater/soil
remediation. Herein, we experimentally investigate the feasibility
of reusing amorphous iron sludge to prepare Fe
3
O
4
@C magnetic
particles (MPs), seen from characterization of XRD and FT-IR,
through a facile solvothermal and pyrolysis method. Morphologic
monitoring with a scanning electron microscope (SEM-EDS)
revealed that during the solvothermal and pyrolysis process
as-prepared Fe
3
O
4
@C aggregated to form surface of irregularly
shaped particles with fine grains and displayed porous structure.
The major chemical element components of Fe
3
O
4
@C contain C
(24±0.2%), O (41.1%), Si (7.3±1.1%) and Fe (22±2.5%). These as-
prepared sludge-derived particles are considered as an efficient
heterogeneous catalyst for the activation of persulfates. More
than 99% of methylene blue (MeB) was degraded within 15 min at
0.5 g/L PDS and 0.2 g/L Fe
3
O
4
@C, which was more efficient than
PMS under the same condition. This study provides alternative
iron sludge recycle method of converting water treatment
residuals to the cost efficient catalysts for degradation of azo-dye
and refractory organic contaminants.
Biography
Shijun Zhu is a Doctoral candidate in School of Municipal and Environmental
Engineering, Harbin Institute of Technology (HIT), China. He has completed
his Master’s degree from HIT. His major is Environmental Engineering and
his research focuses of environmental chemistry and materials, the devel-
opment of sustainable water recovery and reuse, advanced catalytic oxida-
tion of persistent organic contaminants in water and wastewater. He has
published more than four papers as first author or corresponding author in
domestic and foreign journals and has been invited by international journals
as a Reviewer. In the past few years, he has continuously reviewed for inter-
national top-ranked journals like
Journal of Hazardous Materials, Frontiers of
Environmental Science and Technology, Water Environment Research.
zhushijun_2010@126.comFacile synthesis of F
e
3
O
4
@C based on iron sludge as
heterogeneous persulfate catalyst for degradation of organic
contaminants
Shijun Zhu, Yongpeng Xu
and
Fuyi Cui
Harbin Institute of Technology, China
Shijun Zhu et al., J Environ Res, Volume 2