Abstracts Book - IMRC 2018

• SD7-P032
CHARACTERIZATION OF THE POTASSIUM JAROSITE
SYNTHESIZED WITH AN IMPROVED METHOD. EFFECT OF TIME
AND TEMPERATURE
Elias Hermández Lazcano 1 , Juan Hernández Avila 1 , María Isabel Reyes Valderrama 1 , Eduardo
Cerecedo Saenz 1 , Ventura Rodriguez Lugo 1 , Eleazar Salinas Rodríguez 1
1 Universidad Autónoma del Estado de Hidalgo, Área Académica de Ciencias de la Tierra y
Materiales, Instituto de Ciencias Básicas e Ingeniería, Mexico.
The Jarosite is a mineral spread widely in the planet, belonging to the long
isoestructural family jarosite-alunite, with the formula: H 3 O-K Fe 3 (SO 4 ) 2 (OH) 6 ;
the jarosite group is a common alteration and a hydrothermal secondary
mineral phase, especially in oxidative environments of sulfide-rich minerals. It is
commonly used in industry as a waste dump of excess of Fe, Zn, Cu, As, Cr and
Cd acid leaching solutions, cataloging this mineral group as a good adsorbent
compared to other minerals in the elimination of dangerous metals, for what his
study turns out to be very interesting. This work tries to highlight the
modification of the conditions reported in the literature for the synthesis of
potassium jarosite, increasing viability in terms of saving energy and reduction
of costs for his application in the treatment of contaminated effluents. In this
work the effect of time and temperature on the specific formation of potassium
jarosite is presented. A serie of four syntheses was performed to evaluate the
effect of time working at 3, 6, 9 and 12 hours; and a serie of four synthesis to
evaluate the temperature effect working at 60, 75, 80 and 90°C. Yellowish
powders of each synthesis were obtained which were characterized by Scanning
Electron Microscopy to determine the average diameter of the precipitated
particles as well as their morphology and by X-ray Diffraction that based on the
Scherrer equation the crystal size of each powder was determined and a
comparison was realized by each of the samples. Concluding that the
modification of these parameters influences directly the morphology and size of
crystal of the particles precipitated giving way to the synthesis of potassium
jarosite with specific morphological and crystallographic properties without the
need to add external controllers.
Keywords: Jarosite, Reduction,, Time
Presenting authors email: elias.dezlaz@gmail.com