Remoción de colorantes en aguas residuales de la industria textil por medio de material bioadsorbente proveniente de concha de ostras
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Coronado Herrera, Carolanne | 2022
In the present work, the evaluation of a material from oyster shells called coral rock was carried
out: (Coquina), as a bioadsorbent for the removal of dye in wastewater from the textile industry.
Said material was taken to different particle diameters (300 um and less than 300 um) and
subsequently thermally modified using drying at 120°C and calcination at temperatures between
200°C and 800°C, to later be analyzed through different characterization techniques. To evaluate
the removal capacity, as well as the adsorption kinetics of the bioadsorbent, mountings were
made in the laboratory using the brilliant green dye. For the above, dye concentrations of 25, 50
and 75 mg/L, pH between 2 and 12 and doses of bioadsorbent material between 0.2 and 0.6 g/L,
with constant agitation, were evaluated. Aliquots were taken from each experiment at different
time intervals to which absorbance measurement was performed at a wavelength of 640 nm for
the subsequent determination of the dye concentration at each instant of time and determination
of the percentage and capacity of removal. Subsequently, a sweep was carried out through
various types of kinetic models in order to select the one that presented a better fit to the
experimental results, the Pseudo second order model being selected. Finally, the coquina rock
was selected as the best material at a temperature of 120ºC and with a diameter greater than 300
um, with which a removal percentage of 90% was obtained in a given time between 15 and 20
minutes at pH 7. The above allows to conclude that coquina rock is a viable and easily accessible
bioadsorbent material for dye removal in textile wastewater.
LEER