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Environmental Science & Technology 2018
Journal of Environmental Research
Page 46
March 29-31, 2018
Vienna, Austria
4
th
Edition of International Conference on
Environmental Science
& Technology 2018
T
he Pd–Cu/γAl
2
O
3
catalysts were prepared by impregnation
method and introduced into the cathode chamber of a divided
electrochemical denitrification cell with two graphite plates as the
cathode and anode, to enhance the nitrate removal efficiency and
N
2
selectivity. The Pd–Cu/γAl
2
O
3
catalysts were characterized by
transmission electron microscope (TEM), x–ray diffraction (XRD),
specific surface area measurements using BET and inductively
coupled plasma–atomic emission spectrometry (ICP–AES).
In the rationally designed electrochemical–catalytic (ECC)
system, the as–prepared catalyst could significantly enhance
the nitrate degradation rate to 1.08 mg/L at current density
of 10 mA/cm
2
, which was approximately 2.5 times compared
with the electrochemical (EC) system without catalysts adding
in. Additionally, a higher nitrogen selectivity of 80.37% was
obtained under the same experiment condition. The improved
performances were likely due to the presence of a catalytic
reduction reaction of nitrate with the appropriate amount of
hydrogen generated by electrolysis as reductant. Significantly,
the current efficiency was calculated and enhanced value of 20%
to 40% (depended on current density) was obtained in the ECC
process with a catalyst content of 1.0 g/L.
Biography
Zhiqiang Zhang is a PhD student from School of Municipal and Environ-
mental Engineering, Harbin Institute of Technology. His research direction is
novel catalyst development and application in the field of environmental sci-
ence and technology, especially in the removal of oxyanion, such as nitrate,
perchlorate and bromate from water by catalytic hydrogenation reduction
method using Pd- or Pt-based catalyst.
zhangzq2013@yeah.netElectrochemical–catalytic reduction of nitrate over Pd–
Cu/
γ
Al
2
O
3
catalyst in cathode chamber: enhanced removal
efficiency and N
2
selectivity
Zhiqiang Zhang, Wenxin Shi
and
Fuyi Cui
Harbin Institute of Technology, China
Zhiqiang Zhang et al., J Environ Res, Volume 2