Fotodegradación de las aguas residuales con pesticida Mertect en la industria bananera empleando Fotocatálisis con Dióxido de Titanio y Lámpara de Luz Ultravioleta
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Date
2007
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Abstract
Introduction. Pesticides are synthetic chemical
compounds with the characteristic of being
persistent, thus helping to contaminate water
and incorporating pollutants to the soils and to edible
vegetables and animals that, when eaten, act as
pesticide transporters, accumulating that pesticide
in living organisms from all the links of the trophic
chain. This is the reason for the great importance of
the degradation and decontamination processes of
this kind of pollutants. Objective. To evaluate the
photodegradation of the Mertect pesticide by the use
of photocatalysis with titanium dioxide and ultra violet
light. Materials and methods. In the experiment, an
ultra violet light lamp, a glass bucket to store the pesticide to be degraded and a bomb to recirculate
the solution trough the treatment system were used.
The degradation of the pesticide was determined
by visible/ultraviolet spectrophotometry. For the
information analysis the 23 experimental factorial
designs was used, under complete balance.
Results. The highest removal percentage was
99.5%, obtained for two experimental conditions: 50
mg /L of titanium dioxide and 1% v/v of hydrogen peroxide, and 100mg/L of titanium dioxide and 1%v/
v of hydrogen peroxide. Conclusions. Advanced
oxidation processes are adequate to remove and
eliminate the Mertect pesticide in the waste waters
from the banana industry.
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Keywords
Fotodegradación