Remoción del colorante azoico amaranto de soluciones acuosas mediante electrocoagulación
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Date
2009
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista
Abstract
Introduction. Residual water from the dye, food,
textile and pharmaceutical industries, indiscriminately
dumped into water bodies, are responsible of many
harmful effects for the environment, the flora and
the fauna that live in those waters. Among those
effects, some very important ones are the reduction
of the dissolved oxygen, eutrophication, recalcitrant
compounds, which are harmful for cells, the
obstruction of the light that should come into the water
and an aesthetic deterioration. Electro coagulation is
a technology that has been being developed recently,
and can be seen as an alternative for the treatment of
residual waters from the industries mentioned above.
It offers many advantages if compared to traditional
technologies. Objective. To study the removal of the
amaranth azo dye from aqueous solutions by the
use of electro coagulation. Materials and methods.
Synthetic residual waters were treated with electro
coagulation, by using a factorial experimental model
3X2X3 which obeys to pH variations, stream density
and time of treatment. The response variables
measured were the percentages of chemical
demand of oxygen and color. Results. The removals
of chemical demand of oxygen were 98.3% and
those of the color, 99.3% at a pH of 4. The stream
density was 40.86 A/m2y in a 15 minutes treatment.
Conclusion: The results allow establishing that,
from a technical point of view, electro coagulation
can be used in aqueous solutions with amaranth red
dye, for removing the color.
Description
Keywords
Electroquímica, Corporación Universitaria Lasallista, Colorante azoico amaranto, Aguas residuales, Contaminación del agua, Aguas residuales industriales, Electrocoagulación, Tratamiento de aguas residuales