Photo degradation of the tartrazine dye by means of photofenton, using an ultra violet light lamp
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Date
2008
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. All of the production systems demand
natural resources to make goods and services, and
therefore requires environmental services as inputs
and for the disposal of its waste. Food industry is not
the exception to this problem, the generation of waste
with dyes has a negative impact on all of the water
sources in the country, the presence of color in the
water deteriorates the aesthetics of water bodies and
also generates environmental misbalances because
color is an obstacle to the pass of sunlight in the water
surface, avoiding the photo synthesis of algae in rivers
and brooks. When photo synthesis is avoided, as it
is the first link of the food chains, a general misbalance
takes place in the ecosystems, because zooplankton
and fish species feed from algae, and the economy
of villages and towns located at water shores in the
country depend mainly on those fish species.
Objetive. To evaluate the degradation of the
Tartrazine dye using photo catalysis with iron (iii) and
an ultra violet light lamp. Materials and methods.
An experimental randomized factorial design was
used; for the experimental development, we used a
photo reactor system, which consists on an ultra violet
light lamp, a glass container to keep the sample to
be treated and a submersible pump that allows the
re-circulation of the solution through the photo reactor
system. The degradation of the Tartrazine dye was
determined by the use of ultraviolet/visible
espectrophotometry. Results. A good percentage of
the Tarzatrine dye removal (100,0%) was obtained
for the combination of chemical oxidation by using 0
mg/L of Fe 3+ and 0,4 % v/v of hydrogen peroxide as
oxidation agent, and also the experimental
combination of the photo chemical process of
homogeneous photo catalysis and the experimental
rehearsal of 50 mg/L of Fe 3+ and 0,2 % v/v H2O2; It is
also considered that the combinations of 0 mg/L of
Fe 3+ and 0,2 %v/v H2O2 and 50 mg/L of Fe 3+ and 0,4
% v/v H2O2 reach very important removal percentages,
above 99,0 %, of degradation. Conclusion. Advanced
oxidation processes, as homogeneous photo
catalysis, are adequate for the removal and
elimination of the Tartrazine dye.
Description
Keywords
Fotodegradación, Tartrazina, Peróxido de hidrógeno (H2O2), Corporación Universitaria Lasallista, Colorante azoico, Industria alimenticia, Aguas residuales, Aguas residuales coloreadas, Aguas residuales industriales, Tratamiento de aguas residuales