Degradation of organic pollutants using nanomaterials and electrochemical advanced oxidative processes
This work describes the use of both carbon modified with
nanostrucutres (nanoparticles, nanowires and nanospheres)
containing metal and metals oxides and boron doped diamond
electrodes for degradation of cyprofloxacine, fenol, dypirone, blue –
Evans dye. The main materials prepared are related to: Carbon materials
modified with functional groups by acidic and alkaline treatment and
nanomaterials modifying carbon support. The effects of increasing
H2O2 electrogeneration are associated to the surface properties of the
two materials which are completely different from those ones of pure
carbon for further production of hydroxil radicals. For this reason,
we have been developing changes of the carbon materials with acidic
and alkaline treatment and using nanostructures of different oxides
and metals with very small amounts on carbon and base materials
for H2O2 electrogeneration. The main surface chemistry phenomena
of this work is to discuss the modification of the carbon properties
such as hydrophilicity, conductivity, structure and composition of the
surface species when we use both different carbon treatments and
different proportions of nanostructures with several oxides and metals
on carbon. In the case of the use of Boron-Doped Diamond Surfaces
using Solar Photo-Electron-Fenton Processes is same as in the case of
cyprofloxacione in synthetic urine. At the latter case we are capable
to promote the electrochemical incineration of the molecule yielding
96% ciprofloxacin removal and 98% mineralization after 360 min of
electrolysis at optimum values of pH 3.0 and current density of 66.6
mA cm?2. The evolution of released inorganic ions was followed by
ion chromatography.
